Chapter Quiz

  1. The stationary part of an electric motor is called the
    1. Rotor
    2. Stator
    3. Windings
    4. None of the above
  2. Information about a motor can be found
    1. On the bill of sale
    2. On the packing slip
    3. On the nameplate
    4. None of the above
  3. Creating a current flow in the rotor through a magnetic field in the stator is called
    1. Induction
    2. Lamination
    3. Squirreling
    4. Synchronism
  4. Single phase induction motors are not
    1. Common
    2. Squirrel cage
    3. Synchronous
    4. Self-starting
  5. NEMA stands for
    1. National Environmental Management Association
    2. National Electrical Manufacturers Association
    3. National Electrical Maintenance Association
    4. Nation Electrical Minimization Act
  6. The air gap in a motor is the
    1. Space between the phases of electricity
    2. Clean air around the motor to prevent contamination
    3. The space between the rotor and stator
    4. None of the above
  7. 5 mA is equal to
    1. 1/200 of 1 amp
    2. 0.005 amps
    3. 5/1000 of 1 amp
    4. All of the above
  8. The most commonly used AC motors are
    1. Wound synchronous motors
    2. Single phase motors
    3. Squirrel cage induction motors
    4. AC/DC motors
  9. Motors can operate effectively at ± 10% of the designed voltage.
    1. True
    2. False
  10. General purpose motors can overheat when running on a VFD because
    1. They run at slower speeds
    2. They are not designed for that use
    3. The cooling fan turns slower
    4. All of the above
  11. __________ allow higher current to be drawn for motor start up without tripping the breaker.
    1. Overload relays
    2. Transformers
    3. Disconnect switches
    4. Fuses
  12. When using a 4 – 20 mA signal with a flow meter, a current reading of 4 mA represents
    1. Maximum flow
    2. No flow
    3. A short in the loop
    4. Overcurrent
  13. Mechanical floats often use a metal ball to move a ________ that operates a _______.
    1. Switch, armature
    2. Armature, transducer
    3. Switch, transducer
    4. Armature, switch
  14. Because current is harder to read, most loop receivers use a resistor to measure
    1. Amps
    2. Resistance
    3. Voltage
    4. None of the above
  15. The purpose of the air gap in a motor is to prevent the rotor and stator from contacting each other.
    1. True
    2. False
  16. The rotating part of an electric motor is called the
    1. Rotor
    2. Stator
    3. Windings
    4. None of the above
  17. When a motor is labeled inverter ready, it can be controlled with a VFD.
    1. True
    2. False
  18. Starters that slowly apply voltage to motors are called
    1. Slow starters
    2. Cheap starters
    3. Soft starters
    4. None of the above