Page 83 - Teach Yourself Electricity and Electronics

Quiz 63

B. To make it impossible to use appliances that are too large for a given
circuit.
C. To limit the amount of power that a circuit can deliver.
D. To make sure the current is within safe limits.
14. A utility meter’s motor speed works directly from:
A. The number of ampere hours being used at the time.
B. The number of watt hours being used at the time.
C. The number of watts being used at the time.
D. The number of kilowatt hours being used at the time.
15. A utility meter’s readout indicates:
A. Voltage.
B. Power.
C. Current.
D. Energy.

16. A typical frequency counter:
A. Has an analog readout.
B. Is usually accurate to six digits or more.
C. Works by indirectly measuring current.
D. Works by indirectly measuring voltage.
17. A VU meter is never used for measurement of:
A. Sound.
B. Decibels.
C. Power.
D. Energy.
18. The meter movement in an illumination meter measures:
A. Current.
B. Voltage.
C. Power.
D. Energy.
19. An oscilloscope cannot be used to indicate:
A. Frequency.
B. Wave shape.
C. Energy.
D. Peak signal voltage.
20. The display in Fig. 3-18 could be caused by a voltage of:
A. 6.0 V.