
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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- Q1Which of fire extinguisher is used to electrical fire?Foam.Gas.Water.Power30s
- Q2There are three types of coil in D.C machine except.Series coil.Shunt coil.Armature coil.Commutator coil.30s
- Q3The ______________ resistance is greater the _____________ resistance in single phase induction motor.Main winding – Auxiliary windingAuxiliary winding – Main windingArmature Coil – Shunt coilSeries coil – Armature Coil30s
- Q4The device that used for Winding Continuity test is called:Megger.Ohmmeter.Voltmeter.Ammeter.30s
- Q5To measure the current in circuit, you should connect the Ammeter in_______________.Parallel.Compound.Series.Parallel-Series.30s
- Q6A multimeter reads 4 Ω on running windings and 12 Ω on starting windings, this means that the motor has_____________________________.A shorted windingsA good windingsA grounded windingsA open windings30s
- Q7Every single phase motor has a rotating part, called the_______, and a stationary part, called the stator.PolesFrameRotorWinding30s
- Q8In 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
- Q9D.C motors convert electrical energy into_____________________.Solar energyThermal energy.Chemical energy.Mechanical energy.30s
- Q10In 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
- Q11The motor is tripping out at starting, that cause by:Not connected.Size of wire is big.Circuit Breaker size is small.Good connection.30s
- Q12You 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.CommutatorBrush holderBrushesFrame30s
- Q14In 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
- Q15The device that used for Insulation Test is called:Ohmmeter.Megger.Ammeter.Voltmeter.30s