SSC Junior Engineer Electrical Online Exam 2018 CPWD/CWC/MES Electrical Engineering 22-01-2018 Morning7

61. In a capacitor start single-phase induction motor, the capacitor is connected?

A) in series with main winding
B) in series with auxiliary winding
C) in series with both the winding
D) in parallel with auxiliary winding

... Answer is B)
explanation will provide soon.

62. If running winding of a single-phase induction motor is short circuited?

A) run slower
B) spark at light
C) draw excessive current and over heat
D) None of these

... Answer is C)
explanation will provide soon.

63. Short circuiter is used in?

A) repulsion induction motor
B) repulsion motor
C) repulsion start induction run motor
D) None of these

... Answer is #)
Short circuiter is used in repulsion induction motor repulsion motor repulsion start induction run motor ALL three are correct .

64. Which of the following statements regarding repulsion-start induction motor is incorrect?

A) It requires more maintenance of commutator and other mechanical devices
B) It makes quite a bit of noise on starting
C) In fractional horse power motors, it has replaced the capacitor motors
D) It is not easy reversed

... Answer is C)
explanation will provide soon.

65. In a two value capacitor motor, the capacitor used for running purpose is?

A) air capacitor
B) paper spaced oil filled type
C) ceramic type
D) a.c. electrolytic type

... Answer is B)
explanation will provide soon.

66. Speed control of a universal motor is achieved by?

A) varying field flux with lapped field windings
B) connecting rheostat in series
C) applying variable voltage
D) all of these methods

... Answer is D)
explanation will provide soon.

67. In any case, where the height of transmission tower is increased?

A) the line capacitance and inductance will not change
B) the line capacitance and inductance will decrease
C) the line capacitance will decrease and line inductance will increase
D) the line capacitance will decrease but line inductance remain unchanged

... Answer is D)
explanation will provide soon.

68. For transmission lines, steel poles are generally used because ?
A. It has more mechanical strength and more life
B. It occupies less space and give better appearance
C. It has high cost

A) Only A
B) Only B
C) Both A and B
D) Only C

... Answer is C)
explanation will provide soon.

69. A synchonous generator generates reactive power while working at?

A) zero power factor
B) lagging power factor
C) leading power factor
D) Any of these

... Answer is B)
explanation will provide soon.

70. The bedding of a cable consist of?

A) jute
B) hessian cloth
C) both jute and hession cloth
D) None of these

... Answer is C)
explanation will provide soon.





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