Elevator Mechanic Exam 2018
When you are welding with less than 200 Amps. What shade glass should be in your welding hood? 120 Pg 34
#10 Shade
Shunt Overloads 425 All Pages
(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.
Area of a plunger 815 Pg 15
(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
Convert Inches to Millimeters 305 Pg Reference Card
1 inch is equal to 2.54 cm 1 inch is equal to 25.4 mm
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?
1.33 Hz.
What is an ok substitute for a top rail for a barricade? 131 Pg 9
1/4 Inch wire rope
You are installing horizontal sliding doors with guides in each door panel. How much should the guide engage the sill groove? 525 Pg 23
1/4" inch
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
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
OSHA requires that workers have fall protection when working on scaffolding how many feet above the ground? 137
10' Ft.
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?
12 Floors x 3 Elevators= 36 PI's - (3 from 3 floors)9 =27
Weight of rails Question: I you have 15 full 16 lbs. rails and two 8' sections. How much do they weigh?
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
You are testing an elevator with a rated car speed of 500 fpm. At what minimum speed should the car safeties set.
15% 575Fpm 15% is the minimum tripping speed for safties 90 % for electronic trip device 15 x 500 ÷ 100 = 75 75 + 500 = 575
a 75 Ohm resistor has blow and you don't have a replacement, What can you use?
3 - 225 Ohm resistors in parallel
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
3 Feet
How often are extension cords checked for continuity? 129 Pg 20
3 Months
How many points of contact should be maintained on a ladder? 132 Pg 13
3 Points of contact shall be maintained.. Note. Ladder should extend 3 feet above upper landing. 1/4 away from height Step ladders: Never step on top two steps.
Which sling angles are dangerouse 128 Pg 18
30° and smaller. It is recommended to use 45° or greater.
Two controllers in a small motor room face each other with the voltages of 500Volts. What is the minimum clearance? 235 Pg 9
36 Inches
OSHA requires that most scaffold be designed to support How many times there maximum intended load? 137 Pg 18
4 Times
A team is installing a 200Fpm. car with spring buffers. What is the minimum stroke? 215 Pg 4 Figure 5
4" inches 100 or less 1½ 101 to 150 2½ 151 to 200 4
When installing travelling cables what is the minimum length of vertical suspension at both ends before the loop forms? 515 Pg 9
4' ft.
What should the dimensions of the top rail, mid rail and toe board be on an Osha approved barricade? 131 Pg 9
42" 21" 3" toeboard
Your Fluke Digital Meter reads 440VAC What value are you reading?
440 VAC RMS
When using personal fall protection, The life line should be made of a synthetic material or wire rope with a minimum breaking strength of ?
5000 Lbs.
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
5000 Lbs. per worker attached
Your installing an simplex Hydro Elevator with a total rise of 48'. How many rails will you need if you stack them staggered?
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
How long is you body harness lanyard? 131 pg 19
6' Ft.
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?
6000 Lbs.
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
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
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
A Isolation Transformer Isolation transformers are used to minimize electrical noise from being reflected back onto supply lines.
When working in a hoistway, which of the following statement is correct? 110 Pg 5,6
A Lanyard must be hooked above the shoulders
Which relay do you need to Order 710 Pg, 7
A Latching relay: Used for call registration,direction selection or as selector relays Two types are: Set/Rest are electrical and Mechanical Latching relays Need to know latching relay symbol, Its a box with shaded triangle in lower right hand corner.
SCR Example: 635 Pg 14 Figure 26
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
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
A paste flux and solid soldier
Encoder Waveform Question : You get a Sawtooth reading on oscilloscope out of encoder. Is it good? 350 Pg 16,17 630 Pg 18,19
A perfect Encoder Wave Form will have a square wave. A Sawtooth Wave Form is produced when the rise and fall of the Encoder has a fault,
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
The Straight line wiring diagram
Traveling Cable 515 Pg 8,9
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.
Bridal Hitch 128 Pg 17
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.
Category 1 Oil Buffer test, How many seconds should it take for the buffer to fully come back. 215 Pg 10
The car should be run down until it strikes the buffer plunger and compresses the plunger to the limit. The car is then raised rapidly and the return of the plunger to its normal operating position is observed. If the plunger returns to its normal position within 90 Seconds, the buffer is operating satisfactorily
The freight door motor is spinning but the door wont move, Why? 535 Pg. 9
The correct lube must be used on chains.
Extension tubes 850 Pg 16
The extension tubes provide necessary clearance for placement of concrete forms
How do you test incoming power 715 Pg 8
The first voltage to check is incoming voltage, usuallly three phase AC. All three voltages should be checked with an AC voltmeter using the the following procedure. 1. Line 1 to Line 2 2 Line 1 to Line 3 3.Line 2 to Line 3 On most hydraulic elevators the easiest place to take these readings is at the Pump Starter. On a traction the the wires from the disconnect switch usually terminate at three terminals on the controller that are labeled L1, L2, L3
If a Rack and Pinion Hoist (Outside Hoist) is not Plumb ,Level and Square what can happen? 850 Pg Unknown
The hoist can go on safeties!
When using a clevis with a screw type pin, what must you do before each lift? 210 Pg 9
Tighten or inspect the pin
If a Hoist Motor is making noise, What is the problem 625 Pg 12 Figure 18
To help prevent distortion to the building AC supply, INDUCTORS can be used on the AC input section of a solid state drive. These INDUCTORS can serve dbl duty. They operate as transformers to match input voltage or provide voltage isolation, as well as performing filtering on notch effect
Escalator step demarcation lights are required by code for what reason? 825 Pg44
To provide the passenger a visual indication of the entering and exciting
Safeties (What type of safeties would you have on a car that goes 300 FPM? 240 Pg 36
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.
Your about to install duct in the hoistway. What method will give you straightest line? 510 Pg 8
Use a Plumb Line, Snap a Line or measure off the Rail
In a modernization, they plan on moving the controller 30 Feet away which ends up resulting in a voltage drop. What do you do?
Use larger Wire
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
Verify the notch on the dip chip matches the notch on the board.
You are working with eye bolts. What would you check to determine the safe working load? 210 Pg 24 last paragrah
We never use to hoist / Otherwise known as in line load
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
Welded Cover
Ward Leonard System 425 Pg 7,17
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.
Where do you connect a Ammeter to read total circuit current? 405 Pg 9
You can ONLY place an Ammeter in Series with a circuit where you could safely place a piece of wire.
If you get on top of Dumbwaiter what must be done? 545 Pg 14
You never get on top and you work only partially in with the main line OFF
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
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
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
the annual cylinder test (Static Load Test) is required on unexposed cylinders.The test is performed after the relief pressure test by placing the empty car at any location and marking the location of the sill or jack to determine if there is any movement. Any movement that can not be accounted for by temperature change,valve leakage,or visible leaks after 15 minutes indicates an underground leak.
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
ANSI Rule 112.3 states that the Closing Force exerted by a passenger elevator door can not be greater than 30 Lbs.
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
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%
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
Add another wrap to the winch
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
Adjust the door track chains
When should safety barricades be installed across hoistway openings? 131 Pg8
After the rough or finished floors are put in place
Does a residential lift require an Escape Hatch 845 Pg 6
An Escape Hatch is not necessary UNLESS manual operation is not provided!
The three major components of a personal fall arrest system are? 110 Pg 6
Anchorage, Lanyard, Body Harness
You have been told to measure the outside diameter of a pipe. What tool would you use? 205 Pg 4
Caliper Rule
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
Car Door
In order to properly bond an isolation platform Where would you connect the bonding straps. 515 Pg 31
Car Sling to Platform
You are installing elevator machine and sheave. Where would the machine and secondary sheaves be aligned. 230 Pg 17
Center of Rail Measrements
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
Change the Phase Sequencing
You need to speed up a AC motor that has a fixed number of poles. Using the formula PRM = 60 ∙ ƒ ÷ by p/2
Change the frequency HZ
Before you can move the piston in a hydro elevator start up What do you need to do? 805 Pg 25
Check Piston for debris and tightness of the head
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
Check the fuse feeding AC to the rectifier
After Lockout and Tagout , what will be done before maintenance is performed? 550 Pg 8
Check to see that voltage is removed with a meter
When using scaffolding in the shaftway,what must the planks have to keep from moving? 137 Pg 11
Cleats
Your Installing multiple travelers on a high rise car installation. Where should the #1 travelling cable be located? 515 Pg 8
Closest to the rail
As a mechanic, you are sent to install an escalator. What point of reference would you use to square the unit? 825 Pg 5
Column Line
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
Compare the blown fuse to the fuse rating in the straight line wiring diagram
Every time rigging is used, it must be inspected by a? 128 Pg 10
Competent Person
Which of the following air contaminants can easily be filtered by most respirator? 127 Pg 13,14
Concrete Dust
Which of the following maintenance procedures addresses the issue of proper DC Generator commutation? 430 Pg 6'7
Continued contact between brushes and commutator
Which one of the following moving Hazards is called the silent killer? 120 Pg 6
Counterweight
How much should Counterweight way? 240 Pg. 14
Counterweights (Typically) are hung to counter balance the weight of the car PLUS 40% of Capacity Load.
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
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.
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?
Cup
Omega Rails 220 Pg 8
DO NOT TORQUE them at joints Torque limits are required to maintain the shape of the rail.
While testing for a locked rotor condition, what would happen to the motor if the test was carried out to long? 435 Pg 13
Damage the stator or rotor
What is the purpose of the GFCI ? 129 Pg 12
Detects imbalance in the current between hot and neutral
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
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
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
Door Interlock
A class C fire extinguisher can put out what type of fires? 136 Pg 22
Electrical equipment including motors and switches
When replacing a circuit board in a controller, what should you do after the power is Off? 645 Pg 14
Electrostatic discharge (ESD) is commonly known a static electricity. Any form of (ESD) can destroy solid state assemblies and components.Unless directed you should handle all PSBs using a ground strap. Never Remove or install a PCB unless the power is removed from the system!
What print will show you the location and how many fixtures? 175 Pg 8
Elevator constructors receive the elevator Abstract. It Specifies the number of Rails,Hall lanterns,Push Buttons, Ect.... Included is details such as quantity,color,type of materials and special features unique to installation.
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
Entrant
A car keeps blowing a 3(Amp) fuse at the same point in the hoist way, What is the problem?
Exposed traveling Cable
Rack and Pinion Hoist (Outside Hoist) Contractor wants to move the hoist, what do you need? 850 pg 11,12
Extension tubes and ties
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
Falls
Your apprentice ask you what the DBG is for a new installation you are on. Where would you find this information? 175 Pg 11
Final Layout/ hoistway plan view drawing
If your cutting something with a power saw, which way does the piece you are cutting face 225 Pg 5
Finished side down!
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
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)
The Escape Hatch opens which way?
From the outside in, Preventing those in the cab from getting out on their own.
A fire needs thee elements to burn What are they? 136 Pg 4
Fuel, Oxygen, Heat
What type of oil do you put in a machine?
Gear Oil, Non Detergent, Single Viscosity
Exciter voltage comes from what source ? 425 Pg 2
Generator
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
Give a reasonable explanation as to what you must do and most customers will withdraw the request.
In an elevator system of 2 or more cars, what is needed to coordinate the movement and the hall dispatch calls? 720 Pg 19
Group Dispatch
What item in a Hydro Elevator uses electrical power utilizing the principal of electromagnetism. 815 Pg 26
Hydraulic Valve Solenoid An electromechanical device operated by a coil and having an iron or steel plunger as an armature
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
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
Know what a Megger is and what it does 636 Pg. 13
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
If someone on the job smells of alcohol, what do you do? 120 Pg 5
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.
Inductance In A DC Brake Circuit 625 Pg 7 Figure 11
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.
Escalator is 10 inches too low, what was wrong? 825 Pg 12
Incorrect column line or incorrect benchmark
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
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
A "0" in the yellow square of the NFPA label means? 136 pg 19
Is Not reactive
When answering a call, you walk into a machine room and find 2 inches of water on the floor. What do you do? 115
Leave the machine room
What is out of tolerance for 3/8 or .003 ? 180 Pg 11'12
Less than .372 and more than .378 Tolerance in one two directions is Bi Lateral while in one direction it is unilateral
You are preparing to replace a resistor on a car out of service. What should you do first?
Lock Out / Tag Out
Read Lula and Dumb waiters 545 Pg 1
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
How do you measure an Escalator Hand Rail 835 Pg 14 (Figure 14)
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 to determine the correct angle from the vertical for placing a ladder? 132 Pg 16
Measure out the distance of ¼ of height
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
Mechanical detail Drawings
In a vertical lift how many sensors are required (Pan Switches) 845 Pg Unknown
Minimum is 2 switches 15 lbs. and must stop the lift within 2"
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
Move the Hanger POST WISE
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
Moving walkway Max angle is 12° Escalator Max angle is 30°
What are two types of respirator fit checks? 127 Pg 19
Negative and Positive
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
Non Interference timer circuit
Pulling Spare Wires (Example) 10% of 52 Wires 515 Pg.26
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
PSI Formula and Gallons (Example) How much oil to move a 6" jack 25' 815 Pg 10
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
Who gives you a rite to a safe workplace? 125 Pg 1,2
OSHA
Off Delay and On Delay Timer Cicuits 710 Pg 16
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.
In a series circuit with a 10K resistor and a 2mA current flow , what is the applied Voltage?
Ohm Law E= I∙R I x R = 20 20 Volt
During Hydraulic pit maintenance, what are the three major hazards?
Oil, Tripping and electricity
the Counterweight and the frame that weighs 10000 Lbs. needs to be increased by 5%, What would the new counterweight and frame weigh?
On a calculator 10000 x 5 ÷ 100 = 500 10000 + 500 = 10500
The scaffold built in your hoistway must be inspected by a competent person. How does OSHA define a competent person? 125 Pg 17
One who is capable of identifying existing and predictable hazards and who has authorization to take prompt, corrective measurements
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
Permeability The ability of a substance to pack in lines of magnetic flux within a given space.
Your about to do Brake maintenance at a building. How do you start this procedure.
Position the car at the top floor with the doors closed, and land the counterweights. Lock and tag Out
What is the Maximum voltage drop that can occur across a 500 Watt resistor carrying 2 Amps of current?
Power Law P = V∙ I 500 ÷ 2 = 250 Volts
What must be done before checking drive belts on a hydro? 820 Pg 1
Pull the Main Line Switch
Know the formula for RPM 435 Pg. 5
RPM = 60 ∙ ƒ ÷ P÷2 = Step 1. 60 x Frequency (Hz.) = Step 2. Poles ÷ 2 = Take answer 1 and ÷ by answer 2 =
Hand Signals for Moving Boom of Crane and Extend signal. 128 Pg 12
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
Valve Operation 815 Pg 16,17
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
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
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!
Which piece of PPE requires prior authorization and training before you are permitted to use it? 127 Pg 14
Respirators
You suspect a phasing problem with the building power. Which one of the following controller devices would you check first? 820 Pg 5
Reverse Phase Relay The reverse phase device will detect if the incoming power has a loss of phase or phase reversal
You momentarily actuate the motor starting relay. The direction of rotation is not correct. What do you need to do?
Reverse two of the incoming motor phases.
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
Ring Test
What kind of drill method do we use in soft soil? 805 Pg 5,6,7
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.
Traction & Hydraulic elevator machines have many hazards, Which of the following would you consider the most dangerous?
Rotating Equipment
Ward Leonard System (See unit 425 Pg 18 Figure 17) Question : If all three contacts close what will happen? 425 Pg 18 Figure 17
Run High Speed
SCR's 635 Pg12
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.
What is needed for a False Platform 225 Pg 9
Safeties
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
Safety Edge retracting mechanism
On a traction elevator the bottom guide shoes or roller guides are fastened to the ? 240 Pg 4
Safety Plank
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
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
Scaffolding, You have 32' of rise, you are using 3x5 scaffolding. Where will the tie off points be ? 140 PG. 287-288
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'.
Which of the following actions should be taken to measure AC voltage with a digital multi-meter ? 405 Pg 4
Set the function to V~~ , Put the red lead to VΩ Port and the black lead to the COM Port
Amplifiers (Inverting and Non Inverting) 640 Pg 11
Simply: In a Inverting Op Amp (INPUT) is supplied to the Negative In a Non Inverting Op Amp (INPUT) is supplied to Positive
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
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=
What does the AMSE Code specify regarding the clearance between the skirt panel and the side of the step tread? 825 Pg63
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
You receive 26 22Lb. standard lenght rails and 2 8Ft. sections. How much weight will the rails place on the floor?
Standard rails are 16Ft. Long Each Foot weighs 22Lbs 27 x 16 = 432 total feet of rails 432 x 22lbs per foot = 9504Lbs.
Escalator Step Level Switch 825 Pg 37
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.
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
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 are installing push buttons and notice they have snake eye screws. What tool must be used? 205 Pg 10
Tamper Proof
Flash Point is a ? 136 Pg 9
Temperature
And Gates(And) and Exclusive Or Gates(XOR) 645 Pg 5 , 9
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
How would you connect on Ohmmeter to check load resistance? 335 Pg 12
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.
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)
The Gate Switch is activated by the drive door and the relating device has failed
You are preparing to hoist the car for cable installation, before doing this, you need to install which of the following. 520 Pg 3
The Governor Cable
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
The Machine Room Plan View Drawing
Micrometer Reading 170 Pg 17
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.)
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?
The Pump Motor
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?
Block the upper panel securely
Your PFAS must be inspected for damage how often. 131 Pg 19
BEFORE EACH USE
You are using a Temp Run Box and you get shocked! Why! 520 Pg. 4
Bad Ground
When using hoisting materials, How often should they be checked for defects?
Before every pick
If you arrive at site with freight doors and one side is hanging down, what is the first thing that you do?
Block the doors up1
Governor Info: 235 Pg 5
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
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
The primary safety circuit
A "4" in the red square of the NFPA label means ? 136 Pg 19
The product is a severe fire hazard
Series Brake Circuit (345 Pg 8 Figure 11) 345 Pg 8 Figure 11
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.
Who provides PPE 127 Pg 2
Your Employer
Who can you demand a MSDS sheet from to check chemicals in a cleaning product. 110 PG 13
Your elevator Company Superintendent/Manager
