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ELM 2001 : Find and repair faults in d.c electrical machines

Quiz by Abdulla qebal

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21 questions
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  • Q1
    Which of fire extinguisher is used to electrical fire?
    Foam.
    Gas.
    Water.
    Power
    30s
  • Q2
    There are three types of coil in D.C machine except.
    Series coil.
    Shunt coil.
    Armature coil.
    Commutator coil.
    30s
  • Q3
    The ______________ resistance is greater the _____________ resistance in single phase induction motor.
    Main winding – Auxiliary winding
    Auxiliary winding – Main winding
    Armature Coil – Shunt coil
    Series coil – Armature Coil
    30s
  • Q4
    The device that used for Winding Continuity test is called:
    Megger.
    Ohmmeter.
    Voltmeter.
    Ammeter.
    30s
  • Q5
    To measure the current in circuit, you should connect the Ammeter in_______________.
    Parallel.
    Compound.
    Series.
    Parallel-Series.
    30s
  • Q6
    A multimeter reads 4 Ω on running windings and 12 Ω on starting windings, this means that the motor has_____________________________.
    A shorted windings
    A good windings
    A grounded windings
    A open windings
    30s
  • Q7
    Every single phase motor has a rotating part, called the_______, and a stationary part, called the stator.
    Poles
    Frame
    Rotor
    Winding
    30s
  • Q8
    In electrical ground test for single phase motor with winding, The reading is 1.5 Ohm, so the winding is:
    An open circuit.
    A good condition.
    A Short circuit.
    A grounded.
    30s
  • Q9
    D.C motors convert electrical energy into_____________________.
    Solar energy
    Thermal energy.
    Chemical energy.
    Mechanical energy.
    30s
  • Q10
    In electrical insulation test for single phase motor main winding with the auxiliary winding, the reading is 450 Mega ohm so the windings are:
    A Short circuit.
    An open circuit.
    A grounded.
    A good condition.
    30s
  • Q11
    The motor is tripping out at starting, that cause by:
    Not connected.
    Size of wire is big.
    Circuit Breaker size is small.
    Good connection.
    30s
  • Q12
    You heard a noise from electrical motor while it’s running in your school, what case this noise?
    The motor bearing is damaged.
    The motor is small.
    The motor just started.
    The motor run for long time.
    30s
  • Q13
    ________________: Make contact between Commutator and output terminals.
    Commutator
    Brush holder
    Brushes
    Frame
    30s
  • Q14
    In electrical continuity test for starting winding in single phase motor, the reading is 0.2 ohm so the winding is:
    A good condition.
    An open circuit.
    A grounded.
    A Short circuit.
    30s
  • Q15
    The device that used for Insulation Test is called:
    Ohmmeter.
    Megger.
    Ammeter.
    Voltmeter.
    30s

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