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
0 h : 0 m : 1 s