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DC Motors

giannini.chambers 10 questions

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Questions in this quiz (10)

  1. 1What device allows a DC motor to turn in a continuous direction?
    1. ACommutator
    2. BBrushes
    3. CSlip rings
    4. DLaminations
  2. 2In the construction of a motor what do the laminations try to prevent?
    1. AEddy currents
    2. BMagnetic flux density
    3. CVariable current resistance
    4. DParallel induced voltages
  3. 3Name some common components of a DC motor
    1. ACommutator
    2. BSlip rings
    3. CArmature
    4. DField windings
    5. EArmature winding
    6. FSquirrel cage
    7. GBrushes
  4. 4A shunt wound motor has:
    1. AThe field winding in series with the armature winding
    2. BThe field winding in parallel with the armature winding
  5. 5The characteristic of the shunt motor is:
    1. AVery little speed variation between load and no load running speed
    2. BLoads are easily shunted (power transfer)
    3. CSpeed is easily increased and decreased
  6. 6The characteristic of a series wound motor is:
    1. ALittle speed drop as load is applied
    2. BHigh initial torque available
  7. 7What is the main danger of starting a series motor off load?
    1. AThe motor speed can run away causing destruction
    2. BThe shaft can cause serious injury
  8. 8A DC motor has stopped functioning correctly. The power supply is present at the terminal box however the motor doesn't run. What might be faulty?
    1. AExcessive brush wear
    2. BSeized bearings
    3. CBroken continuity
    4. DShort circuit between windings
    5. ETerminals have been reversed
  9. 9Direction of movement in a conductor is characterised by the
    1. ARight hand rule
    2. BLeft hand rule
  10. 10The force experienced on a conductor in Newtons is a function of:
    1. AMagnetic flux density x current x length of conductor in the field
    2. BMagnetic flux x current x length of conductor in the field
    3. CMagnetic flux density x length of conductor in the field x velocity
    4. DMagnetic flux x length of conductor in the field x velocity

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Description
unknown JTL Unit 63 Resources Quiz on DC Motors, created by giannini.chambers on 22/03/2015.
Language
English
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