NATE EXAM: CORE ESSENTIALS
a (The lower the power factor, the less efficient the motor is) - ANSWERS-How
does the power factor of an inductive motor affect efficiency?
a. The lower the power factor, the less efficient the motor is
b. The lower the power factor, the more efficient the motor is
c. The higher the power factor, the less efficient the motor is
d. The power factor has no effect on the efficiency of a motor
c (Shaded-pole) - ANSWERS-Which of the following single-phase ac motors does
not have a start winding?
a. Capacitor-start, capacitor-run
b. Permanent split-capacitor
c. Shaded-pole
d. Split-phase
c (75 to 80%) - ANSWERS-A centrifugal switch opens the start winding circuit
when a capacitor-start motor reaches approximately ____% of its full speed.
a. 50 %
,b. 60 to 70%
c. 75 to 80%
d. 90 to 100%
d (start, run) - ANSWERS-A run capacitor is always connected to the ____ and
____ terminals.
a. primary, secondary
b. run, common
c. start, common
d. start, run
c (start capacitor. Note: Terminal No. 1 on all potential relays is always connected
to the start capacitor. Terminal No. 2 is always connected to the start winding
terminal on the motor or compressor. Terminal No. 5 is always connected to the
common terminal of the motor or compressor.) - ANSWERS-Terminal No. 1 on all
potential relays is always connected to the ____.
a. common terminal
b. run terminal
c. start capacitor
d. start terminal
,c (2, 5) - ANSWERS-The coil of a voltage relay is between terminal ____ and
terminal ____ of the relay.
a. 1, 5
b. 1, 2
c. 2, 5
d. 3, 5
d (Three-phase) - ANSWERS-What type of ac motor has the highest starting
torque and the greatest efficiency?
a. Capacitor-start, capacitor-run
b. Permanent split-capacitor
c. Split-phase
d. Three-phase
c (9) - ANSWERS-How many terminals does a dual-voltage three-phase motor
have?
a. 3
b. 6
c. 9
d. 12
, a (aid the technician in finding the problem) - ANSWERS-The primary function of
any wiring diagram is to ____.
a. aid the technician in finding the problem
b. help the owner repair the problem
c. provide the location of the components
d. reduce repair time
a (One) - ANSWERS-How many functions is an individual circuit in a control system
designed to control?
a. One
b. Two
c. Three
d. Unlimited
c (switch) - ANSWERS-The five basic components common to all schematics are a
power supply, a path, a load, a legend, and a ____.
a. contactor
b. relay
c. switch
a (The lower the power factor, the less efficient the motor is) - ANSWERS-How
does the power factor of an inductive motor affect efficiency?
a. The lower the power factor, the less efficient the motor is
b. The lower the power factor, the more efficient the motor is
c. The higher the power factor, the less efficient the motor is
d. The power factor has no effect on the efficiency of a motor
c (Shaded-pole) - ANSWERS-Which of the following single-phase ac motors does
not have a start winding?
a. Capacitor-start, capacitor-run
b. Permanent split-capacitor
c. Shaded-pole
d. Split-phase
c (75 to 80%) - ANSWERS-A centrifugal switch opens the start winding circuit
when a capacitor-start motor reaches approximately ____% of its full speed.
a. 50 %
,b. 60 to 70%
c. 75 to 80%
d. 90 to 100%
d (start, run) - ANSWERS-A run capacitor is always connected to the ____ and
____ terminals.
a. primary, secondary
b. run, common
c. start, common
d. start, run
c (start capacitor. Note: Terminal No. 1 on all potential relays is always connected
to the start capacitor. Terminal No. 2 is always connected to the start winding
terminal on the motor or compressor. Terminal No. 5 is always connected to the
common terminal of the motor or compressor.) - ANSWERS-Terminal No. 1 on all
potential relays is always connected to the ____.
a. common terminal
b. run terminal
c. start capacitor
d. start terminal
,c (2, 5) - ANSWERS-The coil of a voltage relay is between terminal ____ and
terminal ____ of the relay.
a. 1, 5
b. 1, 2
c. 2, 5
d. 3, 5
d (Three-phase) - ANSWERS-What type of ac motor has the highest starting
torque and the greatest efficiency?
a. Capacitor-start, capacitor-run
b. Permanent split-capacitor
c. Split-phase
d. Three-phase
c (9) - ANSWERS-How many terminals does a dual-voltage three-phase motor
have?
a. 3
b. 6
c. 9
d. 12
, a (aid the technician in finding the problem) - ANSWERS-The primary function of
any wiring diagram is to ____.
a. aid the technician in finding the problem
b. help the owner repair the problem
c. provide the location of the components
d. reduce repair time
a (One) - ANSWERS-How many functions is an individual circuit in a control system
designed to control?
a. One
b. Two
c. Three
d. Unlimited
c (switch) - ANSWERS-The five basic components common to all schematics are a
power supply, a path, a load, a legend, and a ____.
a. contactor
b. relay
c. switch
