General Knowledge 002
100 Questions
1 Hour Time Limit

Code Test Preparation Course

Number of Questions 100
Pass mark = 75 %.

You can press the Score Test  button at the bottom of the page to have the test marked.


1.  Locknuts are sometimes used in making electrical connections on studs. In these cases the purpose of the locknuts is to ____.
a)  be able to connect several wires to one stud
b) make it difficult to tamper with the connection
c) make a tighter connection
d) prevent the connection from loosening under vibration

2.  To cut rigid conduit you should ____
a) use a 3-wheel pipe cutter
b) use a cold chisel and ream the ends
c) use a hacksaw and ream the ends
d) order it cut to size

3.  In the course of normal operation the instrument which will be least effective in indicating that a generator may overheat because it is overloaded, is ____
a) a wattmeter
b) a voltmeter
c) an ammeter
d) a stator thermocouple

4.  Two switches in one box under one face-plate is called a ____
a) double-pole switch
b) two-gang switch
c) 2-way switch
d) mistake

5.  A conduit body is ____
a) a cast fitting such as an FD or FS box
b) a standard 10 foot length of conduit
c) a sealtight enclosure
d) a LB or T, or similar fitting

6.  A dwelling unit is ____
a) one unit of an apartment
b) one or more rooms used by one or more persons
c) one or more rooms with space for eating, living, and sleeping
d) A single unit, providing complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping, cooking, and sanitation.

7.  Enclosed means, surrounded by a ____ which will prevent persons from accidentally contacting energized parts.
    I. wall
    II. fence
    III. housing or case
a) I only
b) II only
c) III only
d) I, II or III

8.  Where the conductor material is not specified in the Code, the conductors are specified as ____.
a) bus bars
b) aluminum
c) copper-clad aluminum
d) copper

9.  The voltage lost across a portion of a circuit is called the ____.
a) power loss
b) power factor
c) voltage drop
d) apparent va

10.  In a series circuit ____ is common throughout the circuit.
a) resistance
b) current
c) voltage
d) wattage

11.  Batteries supply ____ current.
a) positive
b) negative
c) direct
d) alternating

12.  Electron flow produced by means of applying mechanical pressure to a material is called ____.
a) photo conduction
b) electrochemistry
c) piezoelectricity
d) thermoelectricity

13.  Raceways shall be provided with ____ to compensate for thermal expansion and contraction.
a) accordion joints
b) thermal fittings
c) expansion joints
d) contro-spansion

14.  An alternation is ____.
a) one-half cycle
b) one hertz
c) one alternator
d) two cycles

15.  What is the function of a neon glow tester?
    I. Determines if circuit is alive
    II. Determines polarity of DC circuits
    III. Determines if circuit is AC or DC
a) I only
b) II only
c) III only
d) I, II and III

16.  What chapter in the Code is Mobile Homes referred to?
a) Chapter 3
b) Chapter 5
c) Chapter 6
d) Chapter 8

17.  Never approach a victim of an electrical injury until you ____.
a) find a witness
b) are sure the power is turned off
c) have a first-aid kit
d) contact the supervisor

18.  A wattmeter indicates ____.
    I. real power
    II. apparent power if PF is not in unity
    III. power factor
a) I only
b) II only
c) III only
d) I, II and III

19.  unless buried, the connection of a ground clamp to a grounding electrode shall be ____.
a) accessible
b) visible
c) readily accessible
d) in sight

20.  The current will lead the voltage when ____.
a) inductive reactance exceeds the capacitive reactance in the circuit
b) reactance exceeds the resistance in the circuit
c) resistance exceeds the reactance in the circuit
d) capacitive reactance exceeds the inductive reactance in the circuit

21.  Mandatory rules of the Code are identified by the use of the word ____ .
a) should
b) shall
c) must
d) could

22.  Which of the following is not one of the considerations that must be evaluated in judging equipment?
a) wire-bending and connection space
b) arcing effects
c) longevity
d) electrical insulation

23.  To increase the range of an AC ammeter which one of the following is most commonly used?
a) a current transformer
b) a condenser
c) an inductor
d) inductor and condenser in parallel

24.  If a test lamp lights when placed in series with a condenser and a suitable source of DC, it is a good indication that the condenser is ____.
a) fully charged
b) short-circuited
c) open-circuited
d) fully discharged

25.  To transmit power economically over considerable distances, it is necessary that the voltages be high. High voltages are readily obtainable with ____ .
a) rectified
b) AC
c) DC
d) carrier

26.  Two 500 watt lamps connected in series across a 110 volt line draws 2 amperes. The total power consumed is ____ watts.
a) 50
b) 150
c) 220
d) 1000

27.  The resistance of a copper wire to the flow of electricity ____.
a) decreases as the length of the wire increases
b) decreases as the diameter of the wire decreases
c) increases as the diameter of the wire increases
d) increases as the length of the wire increases

28.  Enclosed knife switches that require the switch to be open before the housing door can be opened, are called _____ switches.
a) release
b) air-break
c) safety
d) service

29.  A type of cable with preinstalled conductors protected by a spiral metal cover is called by the trade name ____ in the field.
a) BX
b) greenfield
c) sealtight
d) Romex

30.  The resistance of a circuit may vary due to _____.
a) a loose connection
b) change in voltage
c) change in current
d) induction

31.  Grounding conductors running with circuit conductors may be ____.
    I. uninsulated,
    II. a continuous green, if covered
    III. continuous green with yellow stripe, if covered
a) I only
b) II only
c) III only
d) I, II and III

32.  For voltage and current to be in phase, ____.
    I. the circuit impedance has only resistance
    II. the voltage and current appear at their zero and peak values at the
        same time
a) I only
b) II only
c) both I and II
d) neither I nor II

33.  The definition of ampacity is ____.
a) the current-carrying capacity of conductors expressed in volt-amps
b) the current-carrying capacity expressed in amperes
c) the current-carrying capacity of conductors expressed in wattage
d) the current in amperes a conductor can carry continuously under the conditions of use without exceeding its temperature rating

34.  Continuous duty is ____.
a) a load where the maximum current is expected to continue for three hours or more
b) a load where the maximum current is expected to continue for one hour or more
c) intermittent operation in which the load conditions are regularly recurrent
d) operation at a substantially constant load for an indefinitely long time

35.  A location classified as dry may be temporarily subject to ____.
    I. wetness
    II. dampness
a) I only
b) II only
c) both I and II
d) neither I nor II

36.  A ____ is an enclosure designed either for surface or flush mounting and provided with a frame, mat, or trim in which a swinging door or doors are or may be hung.
a) cabinet
b) panelboard
c) cutout box
d) switchboard

37.  A 15 ohm resistance carrying 20 amperes of current uses ____ watts of power.
a) 300
b) 3000
c) 6000
d) none of these

38.  When using a #12 - 2 with ground Romex, the ground ____ carry current under normal operation.
a) will
b) will not
c) will sometimes
d) none of these

39.  As compared with solid wire, stranded wire of the same gauge size is ____.
a) better for higher voltages
b) given a higher ampacity
c) easier to skin
d) larger in total diameter

40.  The type of AC system commonly used to supply both commercial light and power is the____.
a) 3-phase, 3-wire
b) 3-phase, 4-wire
c) 2-phase, 3-wire
d) single-phase, 2-wire

41.  To make a good soldered connection between two stranded wires, it is least important to ____.
a) use enough heat to make the solder flow freely
b) clean the wires carefully
c) twist the wires together before soldering
d) apply solder to each strand before twisting the two wires together

42.  The most important reason for using a condulet-type fitting in preference to making a bend in a one inch conduit is to ____.
a) avoid the possible flattening of the conduit when making the bend
b) cut down the amount of conduit needed
c) make a neater job
d) make wire pulling easier

43.  When skinning a small wire, the insulation should be "pencil stripped" rather than cut square to ____.
a) allow more room for the splice
b) save time in making the splice
c) decrease the danger of nicking the wire
d) prevent the braid from fraying

44.  Rubber insulation on an electrical conductor would quickly be damaged by continuous contact with ___
a) water
b) acid
c) oil
d) alkali

45.  A tester using an ordinary light bulb is commonly used to test ____.
a) whether a circuit is AC or DC
b) for polarity of a DC circuit
c) an overloaded circuit
d) for grounds on 120 volt circuits

46.  Pigtails are used on brushes to ____.
a) compensate for wear
b) supply the proper brush tension
c) make a good electrical connection
d) hold the brush in the holder

47.  With respect to fluorescent lamps it is correct to state ____.
a) the filaments seldom burn out
b) the starters and tubes must be replaced at the same time
c) they are easier to install than incandescent light bulbs
d) their efficiency is less than the efficiency of incandescent light bulbs

48.  A ____ stores electrical energy.
a) resistor
b) coil
c) condenser
d) none of these

49.  An overcurrent trip unit of a circuit shall be connected in series with each ___.
a) transformer
b) grounded conductor
c) overcurrent device