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Chapter 6: Troubleshooting
Electrical Theory & Applications for HVACR
14. Pictorial diagrams have:
A.
pictures and a ladder
B.
all pictures and no wiring
C.
pictures or symbols with wiring colors and locaƟons
D.
wire sizes without symbols
15. Wiring diagrams always show the unit with the power;
A.
“off,” unless the instrucƟons located on the diagram say differently
B.
“on” conƟnuously, with nearly all air condiƟoning units
C.
parƟally on
D.
Ɵmed “off for several minutes”
16. A “dead spot” on a permanent split‐phase motor is:
A.
a place in the stator where a faulty rotor someƟmes lines up and will not allow the
motor to start
B.
when the stator is locked by higher or lower voltage
C.
caused by dirt and build‐up from over‐lubricaƟng the bearings
D.
when the motor is not operaƟng as a PSC, but as a CSR motor
17. Which of the following meters is used with a 10‐wrap mulƟplier?
A.
volt meter
B.
ohmmeter
C.
clamp‐on ammeter
D.
line finder meter
18. While checking a 120‐volt simple circuit containing a fuse, switch, and small shaded pole motor,
the volt meter measures 118 volts across the motor, but the motor is not running. The technician
concludes that the ____________ is defecƟve.
A.
motor
B.
fuse
C.
switch
D.
wiring