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WorksheetsMotor Condition and Wattage Assessment Quiz
Total questions: 16
Worksheet time: 9mins
What is another factor to measure besides locked rotor amperage?
Full-load amperage
Motor size
Voltage drop
Wire thickness
At 110°F, what is the running wattage for a motor with 1/9 horsepower?
160
100
218
320
What is the starting wattage for a motor with 1/7 horsepower?
375
970
1250
743
What is one method to safely discharge a capacitor?
Place it in a protective case
Connect it to a battery
Submerge it in water
Expose it to sunlight
What happens during single phasing in a three-phase motor?
The motor gains additional phases
The motor operates more efficiently
The motor loses one or more phases
The motor reduces its current
What action does a phase loss monitor take when one phase goes bad?
Increases motor voltage
Stops the motor
Speeds up the motor
Reduces motor temperature
What is the key requirement for testing single phasing in a three-phase motor?
A) All three sets of windings should have different resistance values.
B) Only one set of windings should have a resistance value.
C) All three sets of windings should have the same resistance value.
D) Two sets of windings should have the same resistance value.
Why is it important to turn off the power before testing a compressor motor?
To save energy
To prevent electrical shock
To reduce noise
To increase efficiency
What is the resistance between the running and starting terminals (both windings) for a 1 horsepower motor?
23.3 Ω
15.2 Ω
13.5 Ω
10.3 Ω
For a 1 horsepower motor, what is the resistance between the common and starting terminal (start winding)?
18.6 Ω
11.0 Ω
8.4 Ω
6.4 Ω
For a 2 horsepower motor, what is the resistance between the common and running terminal (run winding)?
4.7 Ω
3.3 Ω
2.5 Ω
2.1 Ω
During normal operation, what is the resistance between the common terminal and the running terminal?
4.7 Ω
23.3 Ω
18.6 Ω
0.5 Ω
Which of the following is a symptom of a burned-out motor?
Smooth operation
No power or movement
Increased speed
Reduced noise
In which type of applications are external motors used?
Closed-loop applications
Open-drive applications
High-speed applications
Low-power applications
Electrical voltage and current that changes in magnitude and direction in cyclic characteristic; _ electricity in North America cycles 60 times per second
AC
Ampere
Cathode
DC
a meter that displays information using a needle over a scale
dictated circuit
contact points
clamp-on ammeter
Analog meter
