Motor Condition and Wattage Assessment Quiz

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