AC Electrical

Current-carrying conductors used in the AC system of an RV are required to be of the

• low voltage type

• solid copper type

• stranded copper type

• flexible copper type

In determining wire size by gauge, the larger the gauge number, the

• longer the wire length required

• more overcurrent provided

• larger the wire

• smaller the wire

When measured with an ohmmeter, an unfailed overcurrent protection devices will have

• zero resistance

• very high resistance

• 12 VDC

• 120 VAC

Which of the following is acceptable?

• using a 12 ga conductor with a 15 amp circuit breaker

• using a 14 ga conductor with a 20 amp circuit breaker

• using a 12 ga conductor with a 30 amp circuit breaker

• using a 16 ga conductor with a 15 amp circuit breaker

If resistance is added to a series circuit, the current flow

• increases

• remains the same

• decreases

• none of the above

An ohm is a measurement of

• power

• current

• resistance

• voltage

Determine the wattage of an AC circuit that draws 15 amps at 120 VAC

• 8 watts

• 18 watts

• 180 watts

• 1800 watts

Which bulb will use the least amperage?

• 115V, 60 W

• 115V, 100 W

• 12V, 60 W

• 12V, 100W

  A refrigerator is not functioning properly in the electrical mode (no cooling). The resistance of the heating element reveals that it has 20.75 ohms of resis­tance. The data plate indicates that the refrigerator heating element should draw 325 W on 120 VAC. The technician should

• check for 120 on the heating element

• replace with a higher wattage element

• check size of circuit breaker

• replace the heating element

When raising the voltage of a 120 VAC resistive load, its amperage draw will

• increase

• remain the same

• decrease

• increase 1 amp for every 10 volts