Electrical Overall review questions (a-b-c-d)
A voltmeter is connected _____ with circuit being tested. a. in parallel b. in series c. in a sequential configeration d. in a looped configuration
a
An ammeter is used to measure _____. a. current b. voltage c. resistance d. insulation valve
a
Ch1 Class 0 rubber gloves are used when working with voltages less than _____. a. 1,000 volts b. 7,500 volts. c. 17,500 volts. d. 26,500 volts.
a
Ch1 What is the proper distance from the feet of a straight ladder to the wall? a. one-fourth the working height of the ladder b. one-half the height of the ladder c. three feet d. one-fourth of the square root of the height of the ladder
a
Ch11 Older switches marked CU/AL should be used for _____. a. copper wire only b. aluminum wire only c. either copper or aluminum wire d. aluminum-clad copper wire only
a
Ch11 Typical dimmer switch ratings include all of the following EXCEPT _____. a. 100W b. 600W c. 1,000W d. 1,500W
a
Ch12 Type NM cable may not be used in _____. a. shallow chases of masonry used for below-grade walls b. the framework of a building c. protective strips d. attic spaces
a
Ch2 A hickey is used for bending _____. a. RMC and IMC b. EMT and IMC c. PVC conduit d. RMC, EMT, IMC, and PVC conduit
a
Ch2 After bending PVC, the bend can be set by using _____. a. a damp sponge or cloth b. dry ice c. ice-cold water d. a blow dryer
a
Ch2 To prevent the ends of the conduit from being staggered, what additional information must be used when making parallel offset bends? a. center-to-center spacing and tangent of 1/2 the offset angle b. length of the conduit and size of the conduit c. stub-up distance and take-up distance d. offset angle and length of conduit
a
Ch3 Washers are used to _____. a. distribute the load over a larger area b. attach an item to a hollow surface c. anchor materials that expand due to temp cahnges d. allow the bolts to expand with temp changes
a
Ch3 When tightening bolts, nuts, or screws, always use the proper _____. a. tightening sequences b. bolt pattern c. ratchet wrench d. lubrication
a
Ch4 A resistor with a color of red/ red/ orange indicates the value of _____. a. 22,000 ohms b. 66 ohms c. 223 ohms d. 220 ohms
a
Ch4 A type of subatomic particle with a positive charge is a _____. a. proton b. neutron c. electron d. nucleus
a
Ch4 The color band that represents tolorence on a resistor is the _____. a. 4th band b. 3rd band c. 2nd band d. 1st band
a
Ch4 The quality that Ohm's law does not express relationships in an electrical circuit is _____. a. charge b. resistance c. voltage d. current
a
Ch5 The formula for calculating the total resistance in a series circuit with 3 resistors is _____. a. Rt = R1 + R2 + R3 b. Rt = R1 - R2 - R3 c. Rt = R1 x R2 x R3 d. Rt = 1/R1 + 1/R2 + 1/R3
a
Ch7 The NEC provides the _____ requirements for the installation of electrical systems. a. minimum b. most stringent c. design specification d. complete
a
Ch8 Flexible metal conduit _____. a. is made from a single strip of steel or aluminum b. can be used in wet locations if lead covered conductors are insulated c. can be used in underground locations d. is available in sizes up to six inches in diameter
a
Ch8 When conduit is joined to metal boxes, _____ protect the wires from the sharp edges of the conduit. a. washers b. locknuts c. bushings d. couplings
a
Ch8 _____ is the lightest duty and most widely used non-flexible metal conduit available for enclosing and protecting electrical wiring. a. Electrical b. Rigid metal conduit c. Aluminum conduit d. Plastic-coated rigid metal conduit
a
Ch9 How many wires are contained in the three configurations of stranded cable? a. 7, 19, and 37 b. 5, 7, and 9 c. 3, 5, and 7 d. 6, 18, and 36
a
Ch9 What service conductor may be green or green with a yellow stripe? a. The grounding conductor of a multi conductor cable b. The neutral conductor of a multi conductor cable c. The ungrounded conductor of a multi conductor cable d. The high leg of a four-wire, delta connected secondary
a
Parallel circuit has: a. more than one path for current b. one path only for current
a
Voltmeters use a _____ to measure values higher than one volt. a. multiple resistor b. rectifier bridge c. transformer coil d. shunt
a
Which formula finds Total amperage in a parallel circuit? a. It = I1 + I2 + I3 b. It = I1 = I2 = I3 c. It = 1/I1 + 1/I2 + 1/I3 d. It = 1/I1 = 1/I2 = 1/I3
a
Which formula finds Total resistance in a series circuit? a. Rt = R1 + R2 + R3 b. Rt = R1 = R2 = R3 c. Rt = 1/R1 + 1/R2 + 1/R3 d. Rt = 1/R1 = 1/R2 = 1/R3
a
Which formula finds Total voltage in a series circuit? a. Et = E1 + E2 + E3 b. Et = E1 = E2 = E3 c. Et = 1/E1 + 1/E2 + 1/E3 d. Et = 1/E1 = 1/E2 = 1/E3
a
Ch1 The majority of injuries due to electrical shock are caused by electrical shock are caused by _____. a. electrically operated hand tools. b. contact with low-voltage conductors. c. contact with high-voltage conductors. d.lighting.
b
Ch1 Which of these conditions applies to a permit-required confined space, but not to a permit-required space controlled by ventilation? a. a hazard review checklist must be completed b. an attendant, whose job is to monitor the space, must be stationed outside the space c. unacceptable atmospheric conditions must be eliminated d. atmospheric testing must be conducted
b
Ch1 Which of these statements correctly describes a double-insulated power tool? a. there is twice as much insulation on the power cord. b. it can safely be used in place of a grounded tool. c. It is made entirely out of plastic or other nonconducting material. d. the entire tool is covered in rubber.
b
Ch10 What is the minimum size RNC allowed by the specifications? a. 1/2 inch b. 3/4 inch c. 1 inch d. 5/16 inch
b
Ch11 Four-way switches can be used to control lights from more than _____location(s). a. one b. two c. three d. four
b
Ch11 NEMA Type 1 enclosures _____. a. can be used in all locations b. can only be used indoors c. are dust- tight d. are designed for use outdoors
b
Ch11 The designation for a double-pole, single-throw switch is _____. a. S1 b. S2 c. S3 d. S4
b
Ch12 A service conductor without an overall jacket must have a clearance of not less than _____above a window that can be opened. a. two feet b. three feet c. eight feet d. ten feet
b
Ch12 NEC Section 230.6 considers conductors installed under at least _____inch(es) of concrete to be outside the building. a. one b. two c. four d. five
b
Ch12 Type SE cable is available with _____ for interior wiring systems. a. a non-insulated ground or neutral conductor b. an insulated grounded conductor c. no ground conductor d. guard strips
b
Ch2 A back-to-back bend is _____. a. a two-shot 90* bend b. two 90* bends made back-to-back c. an offset with 4 bends d. a segment bend
b
Ch2 A plug set is typically used to prevent _____ PVC when bending it. a. pressurizing b. flattening c. corroding d. cutting
b
Ch2 In a right triangle, the side directly opposite the 90* angle is called the _____. a. right side b. hypotenuse c. altitude d. base
b
Ch2 The field bending of PVC requires a _______. a. hickey b. heating unit c. segmented bender d. one-shot bender
b
Ch2 What is the key to accurate bending with a hand bender. a. correct size and length of handle b. constant foot pressure on the back piece c. using only the correct brand of bender d. correct inverting of the conduit bender
b
Ch2 When making a saddle bend, the center of the saddle will cause the conduit to shrink _____ for every inch of saddle depth. a. 3/8" b. 3/16" c. 3/4" d. 3/32"
b
Ch3 The purpose of a jam nut is to _____. a. hold a piece of material stationary b. lock a standard nut in place c. stop rotation of a machine quickly for safety reasons d. compress a lock washer in place
b
Ch3 When fastening a device or fixture to concrete using concrete/masonary screws, the screws _____. a. need not be installed in predrilled holes because they are self tapping. b. are installed using specially designed carbide drill bits and installation tools made for use with screws c. are installed by hammering them into a drilled or punched hole of the proper size. d. are installed in a hole drilled with a standard masonary drill bit
b
Ch3 When installing a pannel in concrete using a lag screw, you would also use a _____. a. drop-in anchor b. lag shield c. caulk-in anchor d. double-expansion anchor
b
Which formula finds Total resistance in a parallel circuit? a. Rt = R1 + R2 + R3 b. Rt = R1 = R2 = R3 c. Rt = 1/R1 + 1/R2 + 1/R3 d. Rt = 1/R1 = 1/R2 = 1/R3
c
Ammeters use a _____ to measure values higher than 10mA. a. multiple resistor b. rectifier bridge c. transformer coil d. shunt
d
Ch1 If a person's heart begins to fibrillate due to an electric shock, the solution is to _____. a. leave the person alone until the fibrillation stops. b. administer heart massage. c. use the Heimlich maneuver (drop kick the b*tch). d. have a qualified person use emergency defibrillation equipment.
d
Ch1 The most life-threatening hazards on a construction site typically include all of the following except _____. a. falls b. electrocution c. being crushed pr struck by a falling or flying object d. chemical burns
d
Ch10 Which of the following tasks is NOT covered under Division 16? a. Lighting fixtures b. New lay-in ceiling in the corridor of Building B c. Concrete pad for power company transformers Telephone cable d. Telephone cable
d
Ch11 A three-way switch is a type of _____ switch. a. SPST b. DPDT c. DPST d. SPDT
d
Ch11 Which of the following is NOT true regarding modern safety switches? a. They include arc shields b. They have removable interiors c. They have coilproof dual-defeatable d. They are called open knife switches
d
Ch12 Type AC cable may not be used in _____. a. concrete or plaster where dry b. dry masonry c. attic spaces d. wet locations
d
Ch12 When sizing electrical services, at what percentage is the first 3,000VA rated? a. 20% b. 45% c. 80% d. 100%
d
Ch2 Prior to making a 90* bend, what two measurements must be known? a. length of conduit and size of conduit b. desired rise and length of conduit c. size of bender and size of conduit d. stub-up distance and take-up distance
d
Ch2 What tool is used to cut threads in RMC or IMC? a. thread gauge b. cutter c. tap d. die
d
Ch3 The quality of some fasteners can be determined by the _____ on the head of a bolt or screw. a. number of groves cut b. number of sides c. length of the lines d. grade markings
d
Ch3 What type of fasteners are commonly used as lifting devices? a. toggle bolts b. anchor bolts c. j-bolts d. eye bolts
d
Ch4 An electron has _____ coulombs of charge. a. 1.6 x 10 to the power of -9 b. 1.6 x 10 to the power of 9 c. 1.6 x 10 to the power of 19 d. 1.6 x 10 to the power of -19
d
Ch4 The basic unit of power is the _____. a. volt b. ampere c. coulomb d. watt
d
Ch5 Find the total resistance in a series circuit with 3 resistance of 10, 20,and 30. a. 15 ohms b. 1 ohm c. 20 ohms d. 60 ohms
d
Ch5 In a parellel circuit, the voltage across each path is equal to the _____. a. total circuit resistance times path current b. source voltage minus path voltage c. path resistance times total current d. source voltage
d
Ch5 The formula for calculating the total resistance in a parellel circuit with 3 resistors is _____. a. Rt = R1 + R2 + R3 b. Rt = R1 - R2 - R3 c. Rt = R1 x R2 x R3 d. Rt = 1/R1 + 1/R2 + 1/R3
d
Ch7 All of the following groups are usually represented on the Code Making Panels EXCEPT _____. a. trade associations b. electrical inspectors c. insurance organizations d. government lobbyists
d
Ch8 Pancake raceways are a type of _____. a. rigid tubing b. flexible metal conduit c. surface metal raceway d. surface nonmetallic raceway
d
Ch8 When storing raceway, it is best to _____. a. lay it on the floor so that there is no chance that it will fall and injure someone b. store all raceway together regardless of the type of raceway material c. stand it on end so that it does not collect moisture d. cover it with a tarpaulin or other suitable covering to prevent contamination and corrosion
d
Ch8 When transporting threaded metal conduit, it is best to _____. a. remove your gloves so that you do not contaminate the conduit b. remove the thread protection caps so that they do not get lost c. place the metal conduit inside a larger raceway to keep it from bending d. keep the thread protection caps on to prevent damage to the threads
d
Ch8 _____ are rigid rectangular raceways used for housing electric wires and cables. a. Troughs b. Gutters c. Pull boxes d. Conduits
d
Ch9 All of the following help to determine how good a material will be for the construction of the wire EXCEPT _____. a. availability b. cost c. conductivity d. molecular weight
d
Ch9 The purpose of stranding is to _____. a. stiffen the wire b. increase the conductivity of the wire c. decrease the conductivity of the wire d. increase the flexibility of the wire
d
Ch9 Type NMC cable is suitable for all of the following EXCEPT _____. a. dry locations b. damp locations c. corrosive locations d. embedding in concrete
d
Ch9 What letter must be included in the marking of a conductor if it is to be used in a wet, outdoor application? a. D b. O c. I d. W
d
Ch1 Which of the following applies in a lockout/tagout procedure? a. Only the supervisor can install lockout/tagout devices. b. if several employees are involved, the lockout/tagout equipment is applied only by the first employee to arrive at the disconnect. c. Lockout/tagout devices applied by one employee can be removed by another employee as long as it can be verified that the first employee has left for the day. d. Lockout/tagout devices are installed by every authorized employee involved in the work.
d.
Ch3 When using power-actuated tools and fasteners, _____. a. higher-numbered power level loads are used to drive into soft materials b. use only power loads and fasteners that are specifically designed for use with the installation tool c. you may use power loads interchangeably between different tools d. you may used standard fasteners
b
Ch4 An ammeter is placed in _____ with the circuit being tested. a. parallel b. series
b
Ch4 Like charges _____ each other. a. attract b. repel c. have no effect on d. complement
b
Ch4 The power in a circuit with 120 volts and 5 amps is _____. a. 24 watt b. 600 watt c. 6,000 watt d. 1/24 watt
b
Ch5 Kirchhoff's voltage law states that the algebraic sum of the voltages around any closed path is _____. a. infinity b. zero c. twice the current d. always less than the individual voltages due to voltage drop
b
Ch8 Because the wall thickness of _____is much less than that of rigid conduit, it is often referred to as thinwall conduit. a. intermediate metal conduit b. electrical metallic tubing c. rigid nonmetallic conduit d. galvanized rigid steel conduit
b
Ch8 Bending intermediate metal conduit is often easier than bending the same size and quantity of rigid metal conduit because intermediate metal conduit has a slightly _____. a. larger outside diameter b. larger internal diameter c. smaller outside diameter d. smaller internal diameter
b
Ch8 Flexible metal conduit cannot be used in _____ locations. a. dry b. wet c. underground d. outdoor
b
Ch8 Surface metal raceways are designed primarily to protect conductors that run to devices _____ in a room. a. located near the walls and outlets b. located on the surface of the walls and ceilings c. not located near the walls and outlets d. not located near the walls and ceiling
b
Ch8 The type of conduit that provides the best physical protection for the wire inside is _____. a. flexible metal conduit b. rigid metal conduit c. electrical metallic tubing b. intermediate metal conduit
b
Series circuit has: a. more than one path for current b. one path only for current
b
Which formula finds Total amperage in a series circuit? a. It = I1 + I2 + I3 b. It = I1 = I2 = I3 c. It = 1/I1 + 1/I2 + 1/I3 d. It = 1/I1 = 1/I2 = 1/I3
b
Which formula finds Total voltage in a parallel circuit? a. Et = E1 + E2 + E3 b. Et = E1 = E2 = E3 c. Et = 1/E1 + 1/E2 + 1/E3 d. Et = 1/E1 = 1/E2 = 1/E3
b
Ch1 An important use of a hot stick is to _____. a. replace busbars b. test for voltage c. replace fuses d. test for continuity
c
Ch1 What are the minimum and maximum distances (in inches) that a scaffold plank can extend beyond its end support? a. 4;8 b. 6;10 c. 6;12 d. 8;12
c
Ch12 Type SER cable may be used _____. a. in overhead applications b. underground c. as a subfeed under certain conditions d. in hazardous locations
c
Ch2 The formula for calculating the circumference of a circle is _____. a. pi x R2 b. 2pi x R2 c. pi x D d. 2pi x D
c
Ch2 To ensure the conduit enters straight into the junction box, a(n) _____ may be required. a. back-to-back bend b. saddle bend c. offset d. take-up
c
Ch2 When using a pipe cutter, always rotate the cutter _____ to start cut. a. in a clockwise direction b. with the grain c. in a counter clockwise direction d. against the grain
c
Ch2 You would use _____ to smooth the sharp inside edge of metal conduit after it has been cut. a. a flat file b. rough sandpaper c. a reamer d. a pocket knife
c
Ch3 Torque is normally expressed in _____. a. pounds per square inch (psi) b. gallons per minute (gpm) c. foot pounds (ft. lbs.) d. cubic feet per minute (cpm)
c
Ch3 Wedge and sleeve anchors are classified as _____ anchors. a. bolt b. hollow-wall c. one-step d. screw
c
Ch4 A type of subatomic particle with a negative charge is a(n) _____. a. proton b. neutron c. electron d. nucleus
c
Ch8 A Type LB conduit body has the cover on _____. a. the left b. the right c. the back d. both sides
c
Ch8 Wireways must not be installed where they are subject to _____. a. physical damage b. corrosion and sunlight c. hazardous locations d. physical damage, corrosive vapors, and hazardous locations
c
Ch9 The most common conductor material is _____. a. silver b. aluminum c. copper d. platinum
c
Ch9 Type USE cable can be used for _____. a. above-ground installation only b. underground installation within a special PVC pipeline c. underground installation including direct burial d. indoor applications only
c
Ch9 What are the colors of insulation on the conductors for a three-conductor NM cable? a. One white or gray, one red, and one black b. Two white or gray, and one red c. One white or gray, one red, one black, and a grounded conductor d. One green, one white or gray, one blue, and a grounding conductor
c
Electromotive force is measured using a _____. a. ammeter b. wattmeter c. voltmeter d. ohmmeter
c
What formula is used in Ohms law? a. I/ExR b. R/IxE c. E/IxR d. E/RxI
c
What is the formula for power? a. P = I/E b. P = I + E c. P = I x E d. P = I - E
c
