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ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 1 A transformer in an electric circuit serves to
a) generate its own electrical power
b) transform electrical energy into mechanical energy
c) increase or decrease circuit voltage as required
d) convert AC current to DC current
Right answer: a) b) c) X d)
ANR - 2 The basic operating principle of a transformer is attributed to
a) electromagnetic induction
b) variance of a conductor in a magnetic field
c) mutual reaction
d) thermionic emission
Right answer: a) X b) c) d)
ANR - 3 Transformer cores are laminated to reduce
a) eddy currents
b) secondary flux
c) leakage flux
d) all of the above
Right answer: a) X b) c) d)
ANR - 4 A certain transformer has a turns ratio of 1:1. The transformer is used for:
a) impedance matching.
b) changing frequency.
c) isolation.
d) stepping-up voltage.
Right answer: a) b) c) X d)
ANR - 5 A step-down transformer is used to change:
a) high power to low power.
b) alternating current to direct current.
c) high voltage to low voltage.
d) high current to low current.
Right answer: a) b) c) X d)
Version 1.0.3 , 2022 © Adrian MINCULESCU
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, Navigare necesse est vivere non est necesse
ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 6 A transformer is a device used to:
a) rectify voltages from AC to DC.
b) transfer electric energy by mutual induction.
c) convert mechanical energy into electric energy.
d) all of these
Right answer: a) b) X c) d)
ANR - 7 An increased mechanical load on the shaft of an induction motor will cause the
speed of rotation to slightly decrease which causes:
a) slip to increase, induced armature current to increase, and torque to increase.
b) slip to decrease, induced armature current to increase, and torque to increase.
c) slip to increase, induced armature current to decrease, and torque to increase.
d) slip to increase, induced armature current to increase, and torque to decrease.
Right answer: a) X b) c) d)
ANR - 8 An iron core is used in a transformer to:
a) reduce hysteresis loss.
b) eliminate eddy current losses.
c) ensure good magnetic linkage between windings.
d) reduce the counter-emf.
Right answer: a) b) c) X d)
ANR - 9 An isolation transformer:
a) isolates its load from the power distribution system
b) has equal primary and secondary voltages
c) is a type of power transformer
d) all of the above
Right answer: a) b) c) d) X
ANR - 10 Current is produced in a squirrel-cage rotor by means of:
a) brushes and slip rings.
b) a commutator.
c) induction.
d) synchronous motion.
Right answer: a) b) c) X d)
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, Navigare necesse est vivere non est necesse
ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 11 Most transformers operate to transfer energy at an efficiency of about:
a) 25 percent.
b) 75 percent.
c) 80 percent.
d) 95 percent.
Right answer: a) b) c) d) X
ANR - 12 Motors are usually not rated for:
a) power factor
b) duty cycle
c) service factor
d) temperature
Right answer: a) X b) c) d)
ANR - 13 One disadvantage of the autotransformer is:
a) it can only step up the voltage
b) it can only step down the voltage
c) it does not provide electrical isolation
d) none of the above
Right answer: a) b) c) X d)
ANR - 14 Power transformers are designed to operate:
a) from 50-Hz line frequency.
b) in the audio frequency range.
c) in the radio frequency range.
d) all of these
Right answer: a) X b) c) d)
ANR - 15 The currents induced in the core of a transformer are called:
a) eddy currents
b) hysteresis currents
c) secondary currents
d) none of the above
Right answer: a) X b) c) d)
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ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 16 The direction of rotation of a split-phase induction motor can be changed by:
a) reversing the current through the rotor.
b) reversing the leads of the AC voltage source.
c) reversing the leads to either the starting or the main winding.
d) reversing the leads to both the starting and the main winding.
Right answer: a) b) c) X d)
ANR - 17 The purpose of the capacitor in a capacitor-start motor is to:
a) produce a higher starting torque.
b) block DC from getting to the starter winding.
c) limit field current to the starter winding.
d) increase running speed.
Right answer: a) X b) c) d)
ANR - 18 The rated input and output voltages of a transformer are checked with a
voltmeter. Technician A says a normal primary voltage reading and no secondary
voltage reading is an indication of an open secondary coil. Technician B says it is
normal for the transformer output voltage to be higher than specified if no load is
a) Technician A only
b) Technician B only
c) both Technician A and Technician B
d) neither Technician A nor Technician B
Right answer: a) b) c) X d)
ANR - 19 The rotor current for a split-phase induction motor is obtained:
a) directly from a separate DC source.
b) directly from the applied AC source.
c) from a rotating magnetic field set up in the stator.
d) by the action of the centrifugal switch.
Right answer: a) b) c) X d)
ANR - 20 The transformer used with a certain model car set has 240 turns in its primary
coil and 24 turns in its secondary coil. If the transformer is connected to a 120-V wall
receptacle the secondary voltage output would be approximately:
a) 6-V AC.
b) 12-V AC.
c) 18-V AC.
d) 24-V AC.
Right answer: a) b) X c) d)
Version 1.0.3 , 2022 © Adrian MINCULESCU
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ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 1 A transformer in an electric circuit serves to
a) generate its own electrical power
b) transform electrical energy into mechanical energy
c) increase or decrease circuit voltage as required
d) convert AC current to DC current
Right answer: a) b) c) X d)
ANR - 2 The basic operating principle of a transformer is attributed to
a) electromagnetic induction
b) variance of a conductor in a magnetic field
c) mutual reaction
d) thermionic emission
Right answer: a) X b) c) d)
ANR - 3 Transformer cores are laminated to reduce
a) eddy currents
b) secondary flux
c) leakage flux
d) all of the above
Right answer: a) X b) c) d)
ANR - 4 A certain transformer has a turns ratio of 1:1. The transformer is used for:
a) impedance matching.
b) changing frequency.
c) isolation.
d) stepping-up voltage.
Right answer: a) b) c) X d)
ANR - 5 A step-down transformer is used to change:
a) high power to low power.
b) alternating current to direct current.
c) high voltage to low voltage.
d) high current to low current.
Right answer: a) b) c) X d)
Version 1.0.3 , 2022 © Adrian MINCULESCU
Page 1 of 116
, Navigare necesse est vivere non est necesse
ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 6 A transformer is a device used to:
a) rectify voltages from AC to DC.
b) transfer electric energy by mutual induction.
c) convert mechanical energy into electric energy.
d) all of these
Right answer: a) b) X c) d)
ANR - 7 An increased mechanical load on the shaft of an induction motor will cause the
speed of rotation to slightly decrease which causes:
a) slip to increase, induced armature current to increase, and torque to increase.
b) slip to decrease, induced armature current to increase, and torque to increase.
c) slip to increase, induced armature current to decrease, and torque to increase.
d) slip to increase, induced armature current to increase, and torque to decrease.
Right answer: a) X b) c) d)
ANR - 8 An iron core is used in a transformer to:
a) reduce hysteresis loss.
b) eliminate eddy current losses.
c) ensure good magnetic linkage between windings.
d) reduce the counter-emf.
Right answer: a) b) c) X d)
ANR - 9 An isolation transformer:
a) isolates its load from the power distribution system
b) has equal primary and secondary voltages
c) is a type of power transformer
d) all of the above
Right answer: a) b) c) d) X
ANR - 10 Current is produced in a squirrel-cage rotor by means of:
a) brushes and slip rings.
b) a commutator.
c) induction.
d) synchronous motion.
Right answer: a) b) c) X d)
Version 1.0.3 , 2022 © Adrian MINCULESCU
Page 2 of 116
, Navigare necesse est vivere non est necesse
ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 11 Most transformers operate to transfer energy at an efficiency of about:
a) 25 percent.
b) 75 percent.
c) 80 percent.
d) 95 percent.
Right answer: a) b) c) d) X
ANR - 12 Motors are usually not rated for:
a) power factor
b) duty cycle
c) service factor
d) temperature
Right answer: a) X b) c) d)
ANR - 13 One disadvantage of the autotransformer is:
a) it can only step up the voltage
b) it can only step down the voltage
c) it does not provide electrical isolation
d) none of the above
Right answer: a) b) c) X d)
ANR - 14 Power transformers are designed to operate:
a) from 50-Hz line frequency.
b) in the audio frequency range.
c) in the radio frequency range.
d) all of these
Right answer: a) X b) c) d)
ANR - 15 The currents induced in the core of a transformer are called:
a) eddy currents
b) hysteresis currents
c) secondary currents
d) none of the above
Right answer: a) X b) c) d)
Version 1.0.3 , 2022 © Adrian MINCULESCU
Page 3 of 116
, Navigare necesse est vivere non est necesse
ANR 2022 -> DECK MANAGERIAL -> 08 MIB (QUESTIONS & ANSWERS)
ANR - 16 The direction of rotation of a split-phase induction motor can be changed by:
a) reversing the current through the rotor.
b) reversing the leads of the AC voltage source.
c) reversing the leads to either the starting or the main winding.
d) reversing the leads to both the starting and the main winding.
Right answer: a) b) c) X d)
ANR - 17 The purpose of the capacitor in a capacitor-start motor is to:
a) produce a higher starting torque.
b) block DC from getting to the starter winding.
c) limit field current to the starter winding.
d) increase running speed.
Right answer: a) X b) c) d)
ANR - 18 The rated input and output voltages of a transformer are checked with a
voltmeter. Technician A says a normal primary voltage reading and no secondary
voltage reading is an indication of an open secondary coil. Technician B says it is
normal for the transformer output voltage to be higher than specified if no load is
a) Technician A only
b) Technician B only
c) both Technician A and Technician B
d) neither Technician A nor Technician B
Right answer: a) b) c) X d)
ANR - 19 The rotor current for a split-phase induction motor is obtained:
a) directly from a separate DC source.
b) directly from the applied AC source.
c) from a rotating magnetic field set up in the stator.
d) by the action of the centrifugal switch.
Right answer: a) b) c) X d)
ANR - 20 The transformer used with a certain model car set has 240 turns in its primary
coil and 24 turns in its secondary coil. If the transformer is connected to a 120-V wall
receptacle the secondary voltage output would be approximately:
a) 6-V AC.
b) 12-V AC.
c) 18-V AC.
d) 24-V AC.
Right answer: a) b) X c) d)
Version 1.0.3 , 2022 © Adrian MINCULESCU
Page 4 of 116
