JOURNEYMAN

CLOSED BOOK
EXAM # 2
JOURNEYMAN CLOSED BOOK EXAM # 2

1. Frequency is measured in .

a. Hertz b. Voltage c. RPM d. Foot pounds

2. Which of the following would cause the most power to be dissipated in the form of heat?

a. XL b. XC c. Resonance d. Resistance

3. is the combined opposition to current by resistance and reactance.

a. Q b. Z c. XC d. I2R

4. An electrician in the industry would first check the to correct a low power factor.

a. Resistance b. Hysteresis c. Inductive load d. Reluctance

5. Single conductor cable runs within building are generally more common than multicable runs
because .

a. Of conduit fill
b. Of the temperature
c. The splicing is easier
d. The weight is evenly distributed

6. has the highest electrical breakdown strength and longest life over all other
materials used for insulation.

a. Rubber insulation
b. Woven cloth
c. Impregnated paper
d. Thermoplastic

7. Voltage in a generator is produced by _ .

a. Resonance b. Pressures c. Cutting lines of force d. Chemical

8. To adjust the voltage generated by a constant speed DC generator, you would change the
.

a. Stator b. Pressure c. Brushes d. Field current

9. The generator which is best suited for electroplating power is a generator.

a. Split-phase b. Six pole c. Separately excited d. Compound

10. To change the rotation of a DC motor you would .

a. Reverse capacitor leads

b. Reverse A1 & A2
c. Reverse commutator
d. Reverse F1 & F2
11. Frequency is determined by the of an alternator.

I. Size
II. Number of poles
III. Voltage
IV. Rotation speed of armature

a. II only b. II & III only c. II & IV only d. I, II & IV only

12. An example of a “made” electrode would be .

a. Metallic water pipe b. Metal frame of a building

c. Concrete-encased d. Ground rod

13. Illumination is measured in .

a. Luminous flux b. Lumens c. Temperature d. Foot candles

14. A motor enclosure designed and constructed to contain sparks or flashes that may ignite
surrounding gas or vapour is called .

a. Non-ventilated b. Encapsulated
c. Explosion proof d. Water cooled

15. The output of a 3∅ transformer is measured in units called .

a. Watts b. Volt-amps c. Impedance d. Turns-ratio

16. Three horsepower is equivalent to .

a. 764 b. 2292 c. 2238 d. None of these

17. Sometimes copper conductors are coated (tinned) to help prevent .

a. Higher resistance b. Mechanical Damage

c. Capacitive reactance d. Chemical reaction

18. A wheatstone bridge is used to measure resistance.

I. Low II. Medium III. High

a. I only b. II & III only c. III only d. II only

19. To check voltage to ground, you would check from .

a. The breaker to the cabinet b. Hot to neutral

c. The breaker to the grounding terminal d. All of these

20. The inductive action that causes current to flow on the outside surface of a conductor is
known as the .

a. Corona effect b. Skin effect

c. Electrolytic effect d. DC reactance

21. Electrical continuity is required by the electrical code for metallic conduit .

a. To ensure equipment grounding b. To reduce static electricity

c. To reduce inductive heat d. To trace electrical wiring
22. The resistance of an open circuit is equal to .

a. Less than one ohm b. Zero c. Infinity d. None of these

23. An electrical timer switch for lighting is normally connected in with the lighting
circuit being controlled.

a. Series b. Parallel c. Sequence d. Tandem

24. 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

25. The grounded conductor would connect to the of a lampholder.

a. Screw shell b. Filament c. Base contact d. Lead in wire

26. A three-phase, 6-pole AC alternator 34 kva, on a Y-connected system. During one complete
mechanical rotation (3600) will have electrical rotations.

a. 1 b. 1 ½ c. 3 d. 12

27. The voltage per turn of the primary of a transformer is the voltage per turn of
the secondary.

a. More than b. The same as c. Less than d. None of these

28. A single concrete-encased electrode shall be augmented by one additional electrode if it does
not have a resistance to ground of .

a. 25 ohms b. 30 ohms c. 50 ohms d. Not a code requirement

29. Which of the following is not true about alternating current?

a. Develops eddy current b. It can be transformed

c. Is suitable for charging batteries d. Interferes with communication lines

30. On a 120v 1∅ circuit, ground fault protection for personnel operates on the principal of
unbalanced current between .

a. The grounded and ungrounded conductor

b. The ungrounded conductor
c. The grounding conductor and the neutral conductor
d. The service disconnect and the branch circuit

31. In a 3∅ circuit, how many electrical degrees separate each phase?

a. 360 b. 180 c. 120 d. 90

32. duty is a type of service where both the load and the time intervals may have
wide variations.

a. Continuous b. Periodic c. Intermittent d. Varying

33. The definition of ambient temperature is .

a. The temperature of the conductor

b. The insulation rating of the conductor
c. The temperature of the area surrounding the conductor
d. The maximum heat the insulation can be used within

34. As the power factor of a circuit is increased .

a. Reactive power is decreased b. Active power is decreased

c. Reactive power is increased d. Both active and reactive power are increased

35. Tinning rubber insulated twisted cable is done to .

a. Make the strands stronger

b. Prevent chemical reactions between the copper and the rubber
c. Increase the resistance
d. Meet NEMA requirements

36. A negatively charged body has .

a. Excess of electrons b. Excess of neutrons

c. Deficit of electrons d. Deficit of neutrons

37. A fluorescent light that blinks “on” and “off” repeatly may in time .

a. Cause the fuse to blow b. Cause the switch to wear out

c. Cause the wire to melt d. Result in damage to the ballast

38. Electrical appliances are connected in parallel because it .

a. Makes the operation of appliances independent of each other

b. Results in reduced power loss
c. Is a simple circuit
d. Draws less current

39. What relationship determines the efficiency of electrical equipment?

a. The power input divided by the output b. The volt-amps x the wattage
c. The va divided by the pf d. The power output divided by the input

40. What is the formula to find watt hours?

a. E x T x 1000 b. E x I x T c. I x E x T/1000 d. E x T x 1000

41. Of the six ways of producing emf, which method is used the least?

a. Pressure b. Solar c. Chemical reaction d. Friction

42. The voltage produced by electromagnetic induction is controlled by _.

a. The number of lines of flux cut per second b. Eddy currents

c. The size of the magnet d. The number of turns

43. As the power factor of a circuit is increased .

a. Reactive power is decreased b. Active power is decreased

c. Reactive power is increased d. Both active and reactive power are increased
44. The breakdown voltage of an insulation depends upon value of AC voltage.

a. RMS b. Effective c. Peak d. 1.732 peak

45. The AC system is preferred to the DC system because .

a. DC voltage cannot be used for domestic appliances

b. DC motors do not have speed control
c. AC voltages can be easily changed in magnitude
d. High-voltage AC transmission is less efficient

46. DC series motors are used in applications where is required.

a. Constant speed b. High starting torque

c. Low no-load speed d. None of these
47. Basically all electric motors operate on the principle of repulsion or .

a. Magnetism b. Induction
c. Resistance d. Capacitance

48. A capacitor opposes .

a. Both a change in voltage & current b. Change in current

c. Change in voltage d. None of these

49. The armature current drawn by any DC motor is proportional to the .

a. Motor speed b. Voltage applied c. Flux required d. Torque applied

50. The greater voltage drop in a circuit will occur when the the current flow
through that part of the circuit.

a. Greater b. Slower c. Faster d. Lower