Elevator Mechanic Study 278
Car Sling to Platform
In order to properly bond an isolation platform Where would you connect the bonding straps. 515 Pg 31
35" to 79"
A residential elevator self holding is between what?
4" inches 100 or less 1½ 101 to 150 2½ 151 to 200 4
A team is installing a 200Fpm. car with spring buffers. What is the minimum stroke? 215 Pg 4 Figure 5
5000 Lbs. per worker attached
An anchorage for workers PFAS (Personal Fall Arresting System) must be independent of any anchorage used to support or suspend platforms and must be capable of supporting 131 Pg 20
High MICA
Armature question
Same
Current is always the same or different in series?
An Escape Hatch is not necessary UNLESS manual operation is not provided!
Does a residential lift require an Escape Hatch 845 Pg 6
High-rises Gate circuit
Door lock circuit is 1.8 Ohms
Incorrect column line or incorrect benchmark
Escalator is 10 inches too low, what was wrong? 825 Pg 12
Temperature
Flash Point is a ? 136 Pg 9
1/4"
How much distance should you have between the door and the strike?
Down
If the car is at the bottom limit, Which way will the car not run?
36 Inches
Two controllers in a small motor room face each other with the voltages of 500Volts. What is the minimum clearance? 235 Pg 9
ANSI Rule 112.3 states that the Closing Force exerted by a passenger elevator door can not be greater than 30 Lbs.
Upon receiving an inspection report, One of the violations noted is the door closing force. When checked with a force gauge, you find the reading to be 50 lbs. Does this comply with ansi code? What should you do to bring it into compliance? 530 Pg10
Relief Valve : Must be tested Annually Its is simply Pressure relief (If car strikes obstruction,Overloaded Car,Car hits stop ring) If set to light Car may not move! Check Valve: It is simply a one way valve permitting oil to flow in one direction Up Valve: The most complicated valve in system Controls Up Start and acceleration to high speed, up slow down, up leveling speed, and up stopping. Down Valve: Because the elevator is not running when on the down direction the down valve depends on system pressure. Bypass and Relief Valve: Have been combined into one
Valve Operation 815 Pg 16,17
When the Generator and Hoist motor armature are connected in parallel they form a closed loop.In this configuration car speed is controlled by controlling the amount of current passing thru the generator shunt field. To achieve nearly constant speed under changing loads , The Ward Leonard System of automatic armature voltage control has been in use for 1/2 century. This system also regenerates power back thru the generator to the AC mains, and an energy cost is realized.
Ward Leonard System 425 Pg 7,17
Run High Speed
Ward Leonard System (See unit 425 Pg 18 Figure 17) Question : If all three contacts close what will happen? 425 Pg 18 Figure 17
15 (Rails) ,16 Lbs., 2 8Ft sections 2 x 8 = 16 total rails are now 16 16 lbs. x 16 ft. (Length of standard rail) = 256 Lbs. 256 Lbs x 16 =4096
Weight of rails Question: I you have 15 full 16 lbs. rails and two 8' sections. How much do they weigh?
3
What are the max amount of 90° pipe bends you can have before a box?
Negative and Positive
What are two types of respirator fit checks? 127 Pg 19
3 25 Ohm resistors in series
What could also be used instead of a 75 Ohm resistor?
Brake pads are worn.
What could cause a car to drift 125%?
A bad inductor
What could cause a noisy motor?
The generator
What do Scars replace?
Acceleration
What do resistors control in the Car run circuit?
leave it alone
What do you do if an Armature is lightly sparking
Skirt board switches are required at both upper and lower ends of escalator. Gap of no more than 3/16ths or (4.8mm) Answer: 3/16" of an inch
What does the AMSE Code specify regarding the clearance between the skirt panel and the side of the step tread? 825 Pg63
The plunger to the car
What does the platen plate connect?
move slower and extreme wear on the sheave
What happens when one rope on a Sheave is lower then the others?
Moving walkway Max angle is 12° Escalator Max angle is 30°
What is Maximum Incline of Moving Walkway? (Example) The moving walkway is at 10° in the field, how much more of an angle could it be at? 830 Pg 6
Replacing ropes/cables
What is a repair job
1/4 Inch wire rope
What is an ok substitute for a top rail for a barricade? 131 Pg 9
Safeties
What is needed for a False Platform 225 Pg 9
Less than .372 and more than .378 Tolerance in one two directions is Bi Lateral while in one direction it is unilateral
What is out of tolerance for 3/8 or .003 ? 180 Pg 11'12
Distance between the counterweight and the buffer
What is runby?
6'
What is the Max length for motor leads?
Power Law P = V∙ I 500 ÷ 2 = 250 Volts
What is the Maximum voltage drop that can occur across a 500 Watt resistor carrying 2 Amps of current?
A DC machine
What is the VVVF drive replacing?
3/8"
What is the distance between the floor sill and the car sill?
Permeability
What is the ease in which a material can pass magnetic lines of force?
Horizontal support for the door hangers
What is the header?
Detects imbalance in the current between hot and neutral
What is the purpose of the GFCI ? 129 Pg 12
150%
What is the relief pressor max?
.3
What is the voltage drop for germanium?
.07
What is the voltage drop on a silicone diode?
Hydraulic Valve Solenoid An electromechanical device operated by a coil and having an iron or steel plunger as an armature
What item in a Hydro Elevator uses electrical power utilizing the principal of electromagnetism. 815 Pg 26
Pull the Main Line Switch
What must be done before checking drive belts on a hydro? 820 Pg 1
1 is hot and 35 is ground
What numbers are hot and ground test points usually on prints?
Dialectic
What prevents arching in a capacitor?
Abstract
What print will show you the location and how many fixtures? 175 Pg 8
42" 21" 3" toeboard
What should the dimensions of the top rail, mid rail and toe board be on an Osha approved barricade? 131 Pg 9
Schedule 80
What size pipe should you use to block up a hydro before working in the pit?
Pal nut
What type of but is used to double nut that will crush the other nut?
Gear Oil, Non Detergent, Single Viscosity
What type of oil do you put in a machine?
You had more control over your floor stops
What was the benefit of a two speed AC motor when it first came out?
Leave the machine room
When answering a call, you walk into a machine room and find 2 inches of water on the floor. What do you do? 115
Verify no voltage is on the capacitor banks
When changing a VVF drive, after LOTO and verifying no voltage, What should you check next?
4' ft.
When installing travelling cables what is the minimum length of vertical suspension at both ends before the loop forms? 515 Pg 9
10 % is desired of each set of wires 15 x 10 ÷ 100 = 1.5 or 2 27 x 10 ÷ 100 = 2.7 or 3 57 x 10 ÷ 100 = 5.7 or 6 Answer: 2 #14, 3 #16, 6 #18
When pulling Hoistway wiring a 10% spare is desirable. If the wiring required (15 - #14 Awg) (27 - #16 Awg) (57 - #18Awg) What is the best selection of wires? 515 Pg 26
Remove weight from the counterweight
When removing a cab for a Mod, What else should you do?
Electrostatic discharge (ESD) and using a ground strap.
When replacing a circuit board in a controller, what should you do after the power is Off? 645 Pg 14
Decreases
When resistors are placed parallel the total resistance increases or decreases?
The Pump Motor
When responding to a service call on a hydro elevator, you determine that the 50 Amp. circuit breaker that feeds the controller has tripped. Which component of the elevator system had the capability of causing this problem?
Swivel Hook
When rigging what do you use to keep the load from spinning?
After the rough or finished floors are put in place
When should safety barricades be installed across hoistway openings? 131 Pg8
Low speed, no load
When testing safeties annually, How would you run the car?
Tighten or inspect the pin
When using a clevis with a screw type pin, what must you do before each lift? 210 Pg 9
A Lanyard must be hooked above the shoulders
When working in a hoistway, which of the following statement is correct? 110 Pg 5,6
#10 Shade
When you are welding with less than 200 Amps. What shade glass should be in your welding hood? 120 Pg 34
You can ONLY place an Ammeter in Series with a circuit where you could safely place a piece of wire.
Where do you connect a Ammeter to read total circuit current? 405 Pg 9
Base of the fire
Where would you point a fire extinguisher?
Set the function to V~~ , Put the red lead to VΩ Port and the black lead to the COM Port
Which of the following actions should be taken to measure AC voltage with a digital multi-meter ? 405 Pg 4
Concrete Dust
Which of the following air contaminants can easily be filtered by most respirator? 127 Pg 13,14
Continued contact between brushes and commutator
Which of the following maintenance procedures addresses the issue of proper DC Generator commutation? 430 Pg 6'7
Counterweight
Which one of the following moving Hazards is called the silent killer? 120 Pg 6
Respirators
Which piece of PPE requires prior authorization and training before you are permitted to use it? 127 Pg 14
Its a box with shaded triangle in lower right hand corner.
Which relay do you need to Order 710 Pg, 7
30° and smaller. It is recommended to use 45° or greater.
Which sling angles are dangerouse 128 Pg 18
Direct Current motors If shunt field voltage is increased , the motor speed will be reduced and torque increased If shunt voltage decreased the reverse is true Increasing the armature voltage of the door motor increases speed Answer: Vary Armature Voltage
While adjusting a passenger elevator door operator equipped with a permanent magnet DC motor, Which operation would you perform to achieve control of the motor? 530 Pg 16
Add another wrap to the winch
While hoisting a rail with a capstan winch with a single whip line, the apprentice has a hard time lifting the rail. What can be done? 210 Pg 17
Safety Edge retracting mechanism
While on a routine maintenance visit you observe the mechanical style safety edges on center opening doors bumping each other and causing the door to reopen. Where would you look to repair this problem? 530 Pg31
Compare the blown fuse to the fuse rating in the straight line wiring diagram
While responding to a trouble call on an elevator door, you find a fuse blown in the DC circuit feeding the door motor. When picking a replacement fuse what should you do? 530 Pg 37
Inputs output A B C D 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 1 1 1 According to our truth table we should have a 1, so the gate is malfunctioning! Answer: The And gate has failed
While troubleshooting a 3 Input And Gate circuit, you see that all 3 inputs are High 1, yet the output of the And Gate is Low 0, Whats the problem? 645 Pg 6
Your elevator Company Superintendent/Manager
Who can you demand a MSDS sheet from to check chemicals in a cleaning product. 110 PG 13
OSHA
Who gives you a rite to a safe workplace? 125 Pg 1,2
Your Employer
Who provides PPE 127 Pg 2
Chains over Lubricated
Why would a freight door motor spin, but not open the doors?
Ring Test
You are about to replace the abrasive wheel on your grinder. What is the test that should be performed prior to using. 130 Pg 20
Non Interference timer circuit
You are called to a building with a pressure button control freight, The problem is when you run the car to the floor, before you can open hall doors a person on another floor can call the car and have it run. What circuit do you look at? 725 Pg 3
Center of Rail Measrements
You are installing elevator machine and sheave. Where would the machine and secondary sheaves be aligned. 230 Pg 17
1/4" inch
You are installing horizontal sliding doors with guides in each door panel. How much should the guide engage the sill groove? 525 Pg 23
Tamper Proof
You are installing push buttons and notice they have snake eye screws. What tool must be used? 205 Pg 10
Cup
You are on a callback and you find the pulley came off the Pump Motor and the set screw is missing.What type of set screw is needed to replace the missing one?
The Governor Cable
You are preparing to hoist the car for cable installation, before doing this, you need to install which of the following. 520 Pg 3
Lock Out / Tag Out
You are preparing to replace a resistor on a car out of service. What should you do first?
A paste flux and solid soldier
You are replacing a DC motor that requires the use of a (500 watt Solder Iron) on the terminals What is needed to ensure good conductivity? 550 Pg 33
Entrant
You are sent to an industrial plant to perform a repair in an elevator pit that has been determined to be a confined space, What general level of training must you have to perform your task? 133 Pg 14
15% 575Fpm 15% is the minimum tripping speed for safties 90 % for electronic trip device 15 x 500 ÷ 100 = 75 75 + 500 = 575
You are testing an elevator with a rated car speed of 500 fpm. At what minimum speed should the car safeties set.
Bad Ground
You are using a Temp Run Box and you get shocked! Why! 520 Pg. 4
3 Feet
You are using a portable ladder to get from landing to the machine room level. How far above the upper level must the side rails of the ladder extend? 132 Pg 13
Give a reasonable explanation as to what you must do and most customers will withdraw the request.
You are working on a service job in an occupied building and the customer ask you much longer it will take before you finish and weather you can take a shortcut or something Which response would be appropriate? 155
We never use to hoist / Otherwise known as in line load
You are working with eye bolts. What would you check to determine the safe working load? 210 Pg 24 last paragrah
Change the Phase Sequencing
You attempt to adjust a new variable voltage, variable frequency door operator, but it operates in the wrong direction, What corrective actions must you take? 530 Pg 21
Kill the main line and put your meter on Ohms
You expect a normal limit to be faulty, How would you test it?
Remove the elevator from service
You find an elevator data tag halfway ripped off, What should you do?
If bad LOTO, and measure the ropes for replacement
You find rouge on a governor rope, What should you do?
A Sawtooth Wave Form is produced when the rise and fall of the Encoder has a fault,
You get a Sawtooth reading on oscilloscope out of encoder. Is it good? 350 Pg 16,17 630 Pg 18,19
Machine lifts 1500lbs and the counterweight lifts 3500
You have a 2500lbs car and a car capacity of 2500, How much does the machine and counterweight lift?
6000 Lbs.
You have a hoist rated at 3000 Lbs. If you used a double block to single block reeving , what would your total lifting capacity be?
If a rotor bar becomes loose at the ring connection, or if a rotor bar should crack current can not flow thru that bar and the entire rotor field is disrupted. Causing a Loud Growling Noise or Humm
You have attempted to start up a 3 Phase AC Motor and the motor stalls than growls or hums. What would be the probable cause? 435 Pg 14
Caliper Rule
You have been told to measure the outside diameter of a pipe. What tool would you use? 205 Pg 4
Frequency from Time or Period ƒ = 1 ÷ T Time period being .5 Usually you will be told how long it takes to complete a single oscillation in which case you would divide the number 1 by the time period given T On a calculator 1 ÷ .5 = 2(Hz)
You have determined that the period of an oscillation that you feel on the car is .5 seconds. What is the frequency of the oscillation? 350 Pg 5
Strain supports are required in the vertical raceway every 100 Feet Begin fastening the strain devices at the LOWEST one and work upward to adjust tension.
You just pulled multi-cords down the hoist way of a high rise installation How should you provide strain relief for the multi cords? 510 Pg 36,37
Clamp on meter across each single line
You keep popping an overload, what is the proper way to test your lines?
Reverse two of the incoming motor phases.
You momentarily actuate the motor starting relay. The direction of rotation is not correct. What do you need to do?
kVa sizing must often be calculated from Primary or Secondary Winding Voltage and Amperage information Formula for single Phase is: kVA = (V∙I) ÷ 1000 220 Volts x 5 ÷ 1000 = 1.1 KVA Now Double this 2.2 KVA
You need to replace an unmarked Single Phase Transformer who primary voltage is 220 Vac. and field measured current is 5 Amps. What size transformer would you order if you size it for twice the field measured values? Found Online
48"
You need to shorten ropes with 24" of runny ropes 2:1, How many inches do you need to shorten the cables?
Change the frequency HZ
You need to speed up a AC motor that has a fixed number of poles. Using the formula PRM = 60 ∙ ƒ ÷ by p/2
Yes, .7 voltage drop
You put a jumper on a transistor and a meter across it and it reads 7.43 volts. is it good?
Standard rails are 16Ft. Long Each Foot weighs 22Lbs 27 x 16 = 432 total feet of rails 432 x 22lbs per foot = 9504Lbs.
You receive 26 22Lb. standard lenght rails and 2 8Ft. sections. How much weight will the rails place on the floor?
The Gate Switch is activated by the drive door and the relating device has failed
You receive a call that an elevator with center opening doors is running with one door partially open, How can this happen? 530 Pg 29 (Last Paragraph)
Put the barricade back, inform the Super, and make a written report
You see a barricade out of place, What should you do?
Verify the notch on the dip chip matches the notch on the board.
You supervisor tells you to change the software on a hydro elevator microprocessor board. The software is in a 24 pin DIP package.To properly orient the new chip on the processor board, what must you do. 645 Pg 11
Reverse Phase Relay The reverse phase device will detect if the incoming power has a loss of phase or phase reversal
You suspect a phasing problem with the building power. Which one of the following controller devices would you check first? 820 Pg 5
One of the resistors is not charging the capacitor, Dialectic failure
You've replaced a capacitor on a door timing circuit and it's still failing, What could be the problem?
440 VAC RMS
Your Fluke Digital Meter reads 440VAC What value are you reading?
Closest to the rail
Your Installing multiple travelers on a high rise car installation. Where should the #1 travelling cable be located? 515 Pg 8
BEFORE EACH USE
Your PFAS must be inspected for damage how often. 131 Pg 19
Position the car at the top floor with the doors closed, and land the counterweights. Lock and tag Out
Your about to do Brake maintenance at a building. How do you start this procedure.
Use a Plumb Line, Snap a Line or measure off the Rail
Your about to install duct in the hoistway. What method will give you straightest line? 510 Pg 8
Deflector Sheave
Your about to install machine beams. What holes should be drilled first?
The Straight line wiring diagram
Your about to troubleshoot an elevator that has shut down. What Print would you use to help you make it easier to trace the circuits and solve the problem
Final Layout/ hoistway plan view drawing
Your apprentice ask you what the DBG is for a new installation you are on. Where would you find this information? 175 Pg 11
A Isolation Transformer Isolation transformers are used to minimize electrical noise from being reflected back onto supply lines.
Your customer is complaining that your older SCR Drive powered elevator is causing noise in the building power lines. What do you need. 410 Pg 11
6 Rails are 16 feet standard length Hydros only have car rails , so a SET of rails 48 ÷ 16 = 3 and we need a SET so x 2 = 6
Your installing an simplex Hydro Elevator with a total rise of 48'. How many rails will you need if you stack them staggered?
Move the Hanger POST WISE
Your sent to replace a traveling cable that is a different size than the original. What must be done to the hanger on the car, so the loop clears the edge of the platform? 515 Pg 9
3 - 225 Ohm resistors in parallel
a 75 Ohm resistor has blow and you don't have a replacement, What can you use?
On a calculator 10000 x 5 ÷ 100 = 500 10000 + 500 = 10500
the Counterweight and the frame that weighs 10000 Lbs. needs to be increased by 5%, What would the new counterweight and frame weigh?
First
Off delay relay opens first or second?
Watts
P is?
Shunt overloads kill the power remotely
What happens if the sprinklers go off in the machine room?
Voltage will double
What happens if you add a resistor in series with a brake coil?
Before every pick
When using hoisting materials, How often should they be checked for defects?
5000 Lbs.
When using personal fall protection, The life line should be made of a synthetic material or wire rope with a minimum breaking strength of ?
Cleats
When using scaffolding in the shaftway,what must the planks have to keep from moving? 137 Pg 11
Lower carriage
Where do you tighten step chains?
Damage the stator or rotor
While testing for a locked rotor condition, what would happen to the motor if the test was carried out to long? 435 Pg 13
The Machine Room Plan View Drawing
You are installing Machines, Governors and Generators and need to know the location where this equipment is to be installed. Where do you Look? 175 Pg 7
ASME Rule 207.8 requires that an elevator shall be able to lower , stop and HOLD 125% of rated load safely. 3000 Lbs. x 125% ÷ 100 = 3750 3750 Lbs. which is 125%
You are installing an elevator with a capacity load of 3000 Lbs.How much of a load should the brake stop and hold if properly adjusted? 230 Pg 2
Not enough runby
You are running a traction elevator to the top floor, but it won't go up anymore, What could be the problem?
The primary safety circuit
Your arriving at a building to perform routine maintenance, you find a traction elevator in the overhead. In order to move the car out of the overhead, you need to jump which of these circuits? 720 Pg 28
Low oil switch
A low pressure switch could also be a what?
Permanent Ceramic Magnetic
Disk brakes are what?
OFF delay circuit
Doors open and close right away. What may be the problem?
Step Level switches (Sometimes referred to as Sag Switches) are located within the step band of both upper and lower truss assemblies.The switches function is to prevent a step that is sagging more than 1/8 inch at the riser end of either side of the step. This is generally caused by worn, damaged or missing step wheels. This switch is manually reset to be able to run.
Escalator Step Level Switch 825 Pg 37
To provide the passenger a visual indication of the entering and exciting
Escalator step demarcation lights are required by code for what reason? 825 Pg44
6' Ft.
How long is you body harness lanyard? 131 pg 19
20Hz?
If you have an elevator that goes 1760 RPM at 60Hz, What Hz do we need for it to go 600 RPM's
Notes:(Pi) π is 3.1416 and 231 Cubic inches to the Gallon Area: Remember to ÷ 6" ÷ 2 = 3 to get Radius Area = π∙ r² Area = 3.1416 x 3 x 3 = 28.27 inches or 3.146 x 9 = 28.27 Volume Multiple are times height to solve for Volume V = A∙H V = 28.27 x 300 (25" feet x 12" = 300) V = 8481 Cubic Inches Since we already know there are 231 cubic inches to the gallon 8481 ÷ 231 = 36.71 Gallons
PSI Formula and Gallons (Example) How much oil to move a 6" jack 25' 815 Pg 10
Polyurethane
U grooves on a Sheave provide better traction with what?
Insert with brackets
What do you mount rail brackets to in cinder block?
Improves the life span of relays
What does a RC network do?
1/2"
What is the max Gap on center doors?
Rotary (Auger Drill) It is generally used on dirt, clay, quicksand and other soft soils Rotary (Core Drill) is generally used on hard compacted soil such as clay, shale or slate and on some gravel and rocks. NOTE: For rocky conditions we use (Percussion Drilling) A more efficient way is with : For hard rock we use (Percussion Rotary) Drilling. This method uses a special bit called a Button Bit which has water and compressed air coming out of bit.
What kind of drill method do we use in soft soil? 805 Pg 5,6,7
grounding wire strap
When changing circuit boards, what should you always have?
x4 and x8 the diameter of the rope
Where do you put the clips when shackling a rope?
Welded Cover
You have finished digging a Hydro Hole. The jack is not on site. Before you leave you must cover the hydro hole with what. 805 Pg 10
12 Floors x 3 Elevators= 36 PI's - (3 from 3 floors)9 =27
12 Floor Building with three cars, 3 floors will not get PI's. How many PI's in total do you need to order for this job?
Bad resistor 2Fl 8/9
3rd floor PI problem
Is Not reactive
A "0" in the yellow square of the NFPA label means? 136 pg 19
The product is a severe fire hazard
A "4" in the red square of the NFPA label means ? 136 Pg 19
High speed with full capacity
A Category 5 elevator test is down how?
Check the fuse feeding AC to the rectifier
A DC door motor supplied from a three phase rectifier runs slow. The DC voltage (Normally 320 Volts) is 220 Volts. What should you do? 530 Pg 16
Exposed traveling Cable
A car keeps blowing a 3(Amp) fuse at the same point in the hoist way, What is the problem?
Electrical equipment including motors and switches
A class C fire extinguisher can put out what type of fires? 136 Pg 22
Car Door
A customer informs you that his elevator has a door mechanical problem at all landings. Where would you look first for the first probable solution? 525
Bad access door switch
A dumbwaiter is still moving after opening the access door, What could be wrong?
Bad non reversal timer
A dumbwaiter returns after you send it away with the load still on it, What could be wrong?
Fuel, Oxygen, Heat
A fire needs thee elements to burn What are they? 136 Pg 4
Relief Valve not adjusted properly
A hydro elevator runs up with a full load, but won't come down, What could be wrong?
Counterweights typically are hung to counter balance the weight of the car plus 40% of capicity load. 3500 (Capacity) x 40 ÷ 100 = 1400 Lbs 1400 (40 % of capcity) + 7000 (Car Weight) = 8400Lbs.
A mechanic has a car that weighs 7000 Lbs. with a capacity load of 3500 Lbs. The counter weight balance is 40%, What does the counterweight weigh? 204 Pg 14
1.33 Hz.
A newly modernized car has a noticeable vibration, The application engineer has asked you to determine the frequency (HZ) of your 24" drive sheave. (Roped 1:1 with a contract speed of 500 Fpm.) What is the frequency?
7.5"
A pump and motor pulley is 6" and 12" the motor is running at 100 rpm. What size pulley is needed to run at 125 rpm?
Check to see that voltage is removed with a meter
After Lockout and Tagout , what will be done before maintenance is performed? 550 Pg 8
Stop switch and light
All elevator pits should have what?
Simply: In a Inverting Op Amp (INPUT) is supplied to the Negative In a Non Inverting Op Amp (INPUT) is supplied to Positive
Amplifiers (Inverting and Non Inverting) 640 Pg 11
A dry sleeve bearing
An elevator has been running fine for months, but when you go to start it, it blows a fuse, What could be the problem?
Bad Wye-delta timer
An elevator runs slowly up on a 6 stop, but it shuts down just after the 5th floor, What could be the problem?
The (AND) gate is manufactured so that its output is High ONLY with all Inputs HIGH Inputs Outputs A B C Low 0 Low 0 Low 0 Low 0 High 1 Low 0 High 1 Low 0 Low 0 High 1 High 1 High 1 The Exclusive Or Gate (XOR) is referred to as the any but not all gate.Note: That if any but not ALL of the inputs are High 1 ,Than the output will be High 1 This is also called a Comparator Gate. Inputs Outputs A B C D Low 0 Low 0 Low 0 Low 0 Low 0 High 1 High 1 High 1 High 1 Low 1 High 1 High 1 High 1 High 1 High 1 Low 0
And Gates(And) and Exclusive Or Gates(XOR) 645 Pg 5 , 9
(Pi) 3.1416 x (R)radius ²(squared) Plunger diameter is 10" So you divide ÷ by 2 = 5 3.1416 x 5² (25)= 78.54 inches
Area of a plunger 815 Pg 15
Column Line
As a mechanic, you are sent to install an escalator. What point of reference would you use to square the unit? 825 Pg 5
Block the upper panel securely
As part of a repair team, you arrive to make repairs on damaged freight doors and find that the panels are racked. To safely enter the car what precautions should be taken?
Check Piston for debris and tightness of the head
Before you can move the piston in a hydro elevator start up What do you need to do? 805 Pg 25
The bridle hitch can consist of two,three, or four single hitches (fig. 3-22), used together to form a bridle hitch for hoisting an object A sling with two legs used to lift a 1,000 pound object will have 500 pounds of the load on each leg when the sling angle is 90 degrees. The load stress on each leg increases as the angle decreases; and if the sling angle was 30 degrees lifting the same 1,000 pound object, the load will be 1,000 pounds on each leg. Try to keep all sling angles greater than 45 degrees; sling angles approaching 30 degrees are considered extremely hazardous and must be avoided at all cost.
Bridal Hitch 128 Pg 17
90 Seconds
Category 1 Oil Buffer test, How many seconds should it take for the buffer to fully come back. 215 Pg 10
1 inch is equal to 2.54 cm 1 inch is equal to 25.4 mm
Convert Inches to Millimeters 305 Pg Reference Card
Find the neutral position
Dump switch. given a print. where would the car be?
Oil, Tripping and electricity
During Hydraulic pit maintenance, what are the three major hazards?
Voltage
E is?
Competent Person
Every time rigging is used, it must be inspected by a? 128 Pg 10
Generator
Exciter voltage comes from what source ? 425 Pg 2
The extension tubes provide necessary clearance for placement of concrete forms
Extension tubes 850 Pg 16
200°
Fire wire in the door locks has a fire rating of what?
Door Interlock
Five people are trapped between floors 16 and 17 in the Miller building. Upon arriving you find the 17th Floor door can be pulled open. What is broken? 525 Pg 27,28
Have both lines LOTO
Freight doors have a separate mainline then the rest of the car, What should you do before maintenance?
The main function of the governor is to grip the governor rope. This action applies the safety stopping device on the care or the counterweight. To do this the governor must first sense an over-speed condition and than apply a braking action. Tripping Speed: Minimum tripping speed to be not less than 115% of rated speed. A 400 Ft/min car would have a minimum governor tripping speed of 400 x 1.15 = 460 Ft/min Elevators having a speed over 150Ft/min shall also have a OVER SPEED Switch When the safeties have set,they can no longer move. Its necessary to stop the machine from turning and wearing the cables and drive sheave. Therefore all elevators with type A and B Safeties shall have a Over Speed switch which will open at not more than 90% of mechanical tripping
Governor Info: 235 Pg 5
Raise Boom / Arm out straight to side with thumb pointed up. Lower Boom / Arm out straight to side with thumb pointed down. Extend Boom / Thumbs pointed out Retract Boom / Thumbs pointed in Hoist up / Forefinger up rotating clockwise Hoist down / Forefinger out facing down rotating counterclockwise
Hand Signals for Moving Boom of Crane and Extend signal. 128 Pg 12
Sandpaper
How are motor brushes seated?
A Megger
How do you check high voltage to ground?
from the Car looking out
How do you determine what hand the car door is?
Eye protection, slow and steady drilling, sharp bit, with cutting oil
How do you drill stainless doors?
Mark along the top portion of incline and bottom. (Not on curved section)Measure in between. Measure Down! Advance the escalator till the bottom line is at the top and place new line at bottom using first measurement. Continue to do this till you reach first measurement. Add all together. Note: Last measurement will be shorter than the rest.
How do you measure an Escalator Hand Rail 835 Pg 14 (Figure 14)
Spider bob
How do you plumb holes?
Using a digital multimeter, place a jumper across the anode and gate, and between the base and emitter. You should read .7 VDC
How do you test a transistor?
. 1. Line 1 to Line 2 2 Line 1 to Line 3 3.Line 2 to Line 3
How do you test incoming power 715 Pg 8
9
How many 100w lights can you put on a 10 Amp breaker.
18"
How many inches above and below should rails be filed?
2"
How many inches does an elevator door need to be made up before closing?
3 Points of contact
How many points of contact should be maintained on a ladder? 132 Pg 13
Counterweights (Typically) are hung to counter balance the weight of the car PLUS 40% of Capacity Load.
How much should Counterweight way? 240 Pg. 14
3 Months
How often are extension cords checked for continuity? 129 Pg 20
Measure out the distance of ¼ of height
How to determine the correct angle from the vertical for placing a ladder? 132 Pg 16
The Black lead is plugged into COMMON The Red Lead is plugged into vΩ Set the Switch to Ω Power removed from the circuit. At least one lead disconnected from load being measured. The Ohmmeter is connected in Parallel across the load. With a digital meter just set and measure. With a Analog meter you have to zero out the meter by touching leads together.
How would you connect on Ohmmeter to check load resistance? 335 Pg 12
Current/ Amps
I is?
INDUCTORS
If a Hoist Motor is making noise, What is the problem 625 Pg 12 Figure 18
The hoist can go on safeties!
If a Rack and Pinion Hoist (Outside Hoist) is not Plumb ,Level and Square what can happen? 850 Pg Unknown
Dislodge the motor
If a Rack and Pinion is not adjusted properly, What could happen?
If you see a co worker with any signs, you must take action. Talk to the mechanic in charge, call you business representative, or call your supervisor.
If someone on the job smells of alcohol, what do you do? 120 Pg 5
Block the doors up
If you arrive at site with freight doors and one side is hanging down, what is the first thing that you do?
You never get on top and you work only partially in with the main line OFF
If you get on top of Dumbwaiter what must be done? 545 Pg 14
A Shortening bar
If you need to have more then one wire in a terminal, What should you have?
Finished side down!
If your cutting something with a power saw, which way does the piece you are cutting face 225 Pg 5
Use larger Wire
In a modernization, they plan on moving the controller 30 Feet away which ends up resulting in a voltage drop. What do you do?
Ohm Law E= I∙R I x R = 20 20 Volt
In a series circuit with a 10K resistor and a 2mA current flow , what is the applied Voltage?
Minimum is 2 switches 15 lbs. and must stop the lift within 2"
In a vertical lift how many sensors are required (Pan Switches) 845 Pg Unknown
Group Dispatch
In an elevator system of 2 or more cars, what is needed to coordinate the movement and the hall dispatch calls? 720 Pg 19
In this figure 11 (Pg 7 Unit 625) it shows R¹ which controls the rate that the magnetic field builds. R¹ controls the time it takes for the brake to energize after BR contact closes. R² is in the discharge path of the brake coil. It controls the time it takes for the brake to set after the BR contact opens. R² also controls voltage spikes from the collapsing magnetic lines of the brake coil when discharging. Thus reducing spikes from reaching other parts of the circuit.
Inductance In A DC Brake Circuit 625 Pg 7 Figure 11
Mechanical detail Drawings
Installing the limit cam on the car, you notice holes in different locations on the mount. Where do you find the correct measurements to set it? 175 Pg 8
Saturated When a given piece of material contains all the lines of force it can hold, it is said to be saturated.Once saturation occurs in a piece of magnetic material, an increase in current flow will not increase its magnetic streangth
It is sometimes necessary to increase the output of a DC Generator to over-speed an elevator as part of the safety test. If the maximum output is reached where the speed can not be increased further, the generator fields are said to be what? 415 Pg 6
RPM = 60 ∙ ƒ ÷ P÷2 = Step 1. 60 x Frequency (Hz.) = Step 2. Poles ÷ 2 = Take answer 1 and ÷ by answer 2 =
Know the formula for RPM 435 Pg. 5
If you are referring to a megohm meter, it is a test of the insulation properties of such things as electric wiring, motor windings and high power antenna mounts. We use a "megger" or "meg out" electrical wiring and equipment to see if it is shorted to ground or the frame in any way. The megger uses much higher voltages to check resistance than a normal Volt-ohm meter. Minimum resistance is 1 Meg Ohm
Know what a Megger is and what it does 636 Pg. 13
The Micrometer is an instrument for measuring very small lengths using the movement of a finely threaded rotating screw. The Metric Mike is graduated and read in hundredths of a millimeter (0.01 mm) The US Mike is graduated and read in thousandths on an inch (0.001 in.)
Micrometer Reading 170 Pg 17
4 Times
OSHA requires that most scaffold be designed to support How many times there maximum intended load? 137 Pg 18
10' Ft.
OSHA requires that workers have fall protection when working on scaffolding how many feet above the ground? 137
Off Delay Timing Circuit: A typical door timing circuit is shown Figure 30 By installing the diode across the discharge resistor(RD) The capacitor will charge fast.This ensures full door timing should the closing cycle be interrupted. When the contacts are open the capacitor discharge can not flow thru the diode but must flow thru the (RD) resistor. The timer described is OFF Delay which means the relay picks as soon as the switch or contact closes. Timing begins when the current from the feed is removed. ON Delay Timing Circuit: Figure 31 When the switch or contacts close the relay is delayed being energized until the capacitors charged.In an On Delay circuit the capacitor is connected in parallel.
Off Delay and On Delay Timer Cicuits 710 Pg 16
DO NOT TORQUE them at joints Torque limits are required to maintain the shape of the rail.
Omega Rails 220 Pg 8
Safety Plank
On a traction elevator the bottom guide shoes or roller guides are fastened to the ? 240 Pg 4
First
On delay Capacitor charges first or second?
Falls
One of the many hazards in the elevator industry is one of the most obvious dangers you could face in construction and modernization, Which of the following is that one? 105 Pg 2
Note: We do not use wire smaller than #20 in travelling cables and #24 outside travelers. Largest wires are feeders to Hoist /Pump motor We always have 10 % spares 10% of 52 = 5.2 On a calculator Multiply the percent 10 by the number you have and ÷ by 100 10 X 52 ÷ 100 = 5.2
Pulling Spare Wires (Example) 10% of 52 Wires 515 Pg.26
Ohms
R is?
Extension tubes and ties
Rack and Pinion Hoist (Outside Hoist) Contractor wants to move the hoist, what do you need? 850 pg 11,12
Lula: Limited use/Limited Access (Example Wheelchair Lifts) Max Rise 25' Max Speed 30 Ft/Min Max Capacity 1400 Lbs. Max Platform Area 18 Sq/Ft. Residential Elevator: Max Rise 50 ' Max Speed 40 Ft/min Max Capacity 940 Lbs. Max Platform Area 19 Sq/Ft 840 Pg 2 Dumbwaiters: Platform limited to 9 Sq/Ft Inside height is limited to no more than 4 Feet Capacity is limited to 500Lbs No Riders
Read Lula and Dumb waiters 545 Pg 1
A Meter with the positive lead on the Anode and the negative lead on the Cathode. A jumper is placed across the Anode and Gate as well This should show .7 Volts an indication of a Good SCR
SCR Example: 635 Pg 14 Figure 26
SCRs are used in DC door motor control and more commonly in Direct Drives (Replacing DC Generators) SCR is a three terminal device. It basically acts as an on/off switch by pulsing the gate of the SCR with a positive voltage. Once an SCR is turned on it remains on, till anode and cathode voltages equalize or the anode and cathode are reversed biased or voltage is removed from the anode and cathode.
SCR's 635 Pg12
Type B / Safeties which apply limited pressure on the guide rails during stopping interval. Continuous tension in the governor rope may or may not be required Note: Type A are for under 150 and are instantaneous type.. Type C are Type A with Oil Buffers. The stopping distance is equal to the effective stroke of the buffer.
Safeties (What type of safeties would you have on a car that goes 300 FPM? 240 Pg 36
Safety circuit
Safety switch electrically open what circuit?
Scaffolding should be tied to the structure using #9 wire or tie-in devices. The first vertical tie should be at the maximum height of 4 times the narrowest base dimension. Additional ties are not to exceed 26' vertically. Maximum horizontal distance between ties is not to exceed 30'.
Scaffolding, You have 32' of rise, you are using 3x5 scaffolding. Where will the tie off points be ? 140 PG. 287-288
You open contact E to reduce the current. Contact E opens when the brake is lifted and inserts more of the brake resistance in this series circuit, reducing the value of the brake current. This circuit places a small portion of the break resistor in series with the brake coil at the start to limit the initial current into the coil, After the coil is fully energized, the full resistor is introduced to further reduce the coil current. That is the current has to gradually build up in the coil and once it does ,it does not require as much current to keep it energized.Like a flywheel, it takes alot to get it going but once its rotating not much is needed, The final current value prevents the brake coil from saturating and thus allow it it to drop quicker and more gently when applying mechanical brake.
Series Brake Circuit (345 Pg 8 Figure 11) 345 Pg 8 Figure 11
(1) A parallel connection. (2) A resistive element placed across the terminals of an armature to bypass a portion of the current. (3) A flexible electrical conductor designed to conduct current around the mechanical joint between two conductors. (4) The resistive element (Usually of very low resistance) used in parallel with a DC ammeter movement to bypass a calibrated portion of the total circuit current.
Shunt Overloads 425 All Pages
underground leak.
Static Load test (Hydraulic Elevator) A car is given a Annual Static Load Test. The car drifts down 15 inches in ten minutes with no noticeable oil leak. Where is it leaking? 820 Pg 12
7' 3" ½ DBG is 6'6" 15 Lbs rail is 3½ inches deep x 2 = 7" ¼ of shims x 2 = ½ of shim combined 6' 6" + 7 = 7' 3" plus the ½ of shim and = 7' 3" ½
The DBG is 6' 6" using a 15 Lb. rail and 1/4 of shims. What is the distance between the angle brackets on the buffer support channel? 220 Pg 1 Figure 3, 215 Pg 5
From the outside in, Preventing those in the cab from getting out on their own.
The Escape Hatch opens which way?
An AC relay
The UTD relay is burnt out, What kind of relay should you order.?
Bad Reed leveling switch
The car is not leveling on the lobby floor, it's about 3" off,What could be the problem?
The correct lube must be used on chains.
The freight door motor is spinning but the door wont move, Why? 535 Pg. 9
Adjust the door track chains
The freight elevator doors are binding because they are hanging slightly out of square. What adjustments can you make to correct the problem? 535 Pg 39
Remove the SCR from the circuit and use an Ohm Meter to check for High Resistance between Anode and Cathode. Connect the positive lead from the Ohmmeter to the Anode and the negative lead to the Cathode. The resistance should be very high!
The fuses on a 3 Phase input to a DC Direct Drive are open and the elevator does not run. What needs to be done to check for a shorted SCR? 635 Pg 14
Permeability The ability of a substance to pack in lines of magnetic flux within a given space.
The motor field winding on a DC Motor are wound around a laminated core piece. This piece is necessary to obtain the needed magnetic field . The composition of the core material is dependent on which characteristics ? 415 Pg 6
One who is capable of identifying existing and predictable hazards and who has authorization to take prompt, corrective measurements
The scaffold built in your hoistway must be inspected by a competent person. How does OSHA define a competent person? 125 Pg 17
Leveling zone plus 3"
The sill guard is equal to the distance of what?
Anchorage, Lanyard, Body Harness
The three major components of a personal fall arrest system are? 110 Pg 6
Transistor or resistor is bad
They give you a print with a SCR and multiple resistors to ground and ask what's wrong?
Single Phase Transformers and Three Phase Transformers require 2 pieces of information: 1. The Load Line to Line voltage (V) volts 2. The Maximum Load phase current (I) current For a Single Phase Transformer (Calculation) KVA = (V x I) ÷ 1000 = For A Three Phase Transformer (Calculation) Note: (1.732) is the numerical value for the (square root of 3) or (3√) KVA = (V x I x 1.732) ÷ 1000 = KVA = (V x I x 3√) ÷ 1000=
They give you a voltage of 480 on Primary and 216 on secondary and a current and asked which transformer you would need to order. 1KVA 1-1 , 2KVA 2-1 , 3KVA 2-1 To Answer Current is needed. also helps to know if Single Phase or Three Phase
Series
To test for current you would place the meter in what?
Rotating Equipment
Traction & Hydraulic elevator machines have many hazards, Which of the following would you consider the most dangerous?
The Travelling cable is connected to the car hanger to form a loop.Generally this loop should be at least 30 times the diameter of the traveling cable,The Hanger may have to be adjusted POST WISE so the loop clears the edge of the platform.The cable must have a minimum of FOUR feet vertical suspension at both the hoist-way and car hanger attachments before it starts to form into its loop.
Traveling Cable 515 Pg 8,9