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Electrical Electronics Engineering
1000 Electric Drives
Quiz 2
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Q.1
Which of the following is the correct abbreviation of SCIM?
a) Solid cage induction motor
b) Square cage induction motor
c) Squirrel cage inverter motor
d) Squirrel cage induction motor
Q.2
Which braking method is the best method for obtaining high braking torque?
a) Plugging
b) Regenerative braking
c) Rheostatic braking
d) Dynamic braking
Q.3
Which of the following is the correct abbreviation of IFOC?
a) Insight field oriented control
b) Indirect field oriented control
c) Inverter field oriented control
d) Isolated field oriented control
Q.4
WhenA current flows into the positive terminal of current source 8 V. Calculate the power delivered by the source.
a) -240 W
b) 356 W
c) -234 W
d) 243 W
Q.5
Which of the following is the correct abbreviation of NENO?
a) Neither even nor original
b) Neither even nor odd
c) Neither even nor orthogonal
d) Neither energy nor odd
Q.6
DC shunt motors are used where the high _________ is required.
a) Breakdown torque
b) Starting torque
c) Maximum torque
d) Minimum torque
Q.7
Which starting method is the best method in Induction motor?
a) Reactance starting
b) Direct online starting
c) Star-Delta starting
d) Autotransformer starting
Q.8
Which of the following are the classes of insulating material in electrical machines?
a) Γ, E, B, F, H, C
b) Γ, A, E, F, H, C
c) Γ, A, E, F, C
d) A, E, B, F, H, C
Q.9
Which motor is preferred for Jaw crushers?
a) SCIM
b) Belt slip ring IM
c) DC shunt motor
d) WRIM
Q.10
Which of the following motor is a 1-Φ AC motor?
a) Shunt motor
b) Capacitor run
c) Series motor
d) Synchronous motor
Q.11
Which of the following are the types of Stress?
a) Longitudinal stress, Shear stress
b) Longitudinal stress, Volume stress, Tangential stress
c) Longitudinal stress, Volume stress
d) Longitudinal stress, Lateral stress, Tangential stress
Q.12
Which of the following type of motor is used for milling and grinding operations?
a) Split phase
b) SCIM
c) Reluctance motor
d) WRIM
Q.13
Which of the following test is used to determine the conditions where electric motors are being used?
a) Seismography
b) Anthropology
c) Thermography
d) Geography
Q.14
Which of the following motor is used in recording instruments?
a) DC motor
b) Synchronous motor
c) Induction motor
d) Reluctance motor
Q.15
Which of the following is used to protect SCR from thermal conditions?
a) Voltage clamping device
b) Snubber circuit
c) Heat sink
d) Zener diode
Q.16
Calculate the output frequency for the six-pulse converter if the supply frequency isHz.
a) 40 Hz
b) 50 Hz
c) 60 Hz
d) 70 Hz
Q.17
Which one of the following load is suitable for leading power factor load in Single phase Half-bridge inverter?
a) R-L-C underdamped
b) C load
c) L-C load
d) R-L-C overdamped
Q.18
Which one of the following device is uncontrolled?
a) MOSFET
b) Diode
c) TRIAC
d) SCR
Q.19
Which one of the element is used to make R load commutating?
a) Coil
b) Resistor
c) Capacitor
d) Inductor
Q.20
Which of the relationship is correct in Permanent magnet DC motor?
a) T ∝ Ia
b) T2 ∝ Ia
c) T ∝ (Ia)0
d) T ∝ (Ia)2
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