Following are the questions and answers to the Sub Engineer in Kerala State Electricity Board Limited(KSEB Ltd) examination conducted by Kerala Public Service Commission on 26-08-2015. We expect this will help the candidates who are preparing for the Sub Engineer and other Electrical Engineering exams. The purpose of this section is just to support the candidates who prepare for Kerala PSC and other competitive exams. You can always refer this website from your mobile phone on the go or from your home PC.
Sub Engineer in KSEB (Kerala State Electricity Board)
Kerala PSC Previous Year Fully Solved Question Paper 2015 | Exam held on: 26-08-2015
Questions : 41-60
41:-The equivalent resistance and leakage reactance of a transformer can be found out by
[a] Open circuit test
[b] short circuit test
[c] polarity test
[d] None of the above

42:-Hydro generator is the commercial name of
[a] Round rotor generator
[b] Cylindrical rotor synchronous generator
[c] Salient pole synchronous generator
[d] All the above

43:-An electrical machine with lower efficiency will have
[a] Less losses
[b] More losses
[c] No losses
[d] Low operating cost

44:-The effect of armature reaction under the pole shoes can be limited by
[a] Inter poles
[b] High reluctance pole tips
[c] Compensating windings
[d] All the above

45:-DC motors are started by using starters because
[a] To increase the starting current
[b] To reduce the staring current
[c] To increase the speed
[d] none of the above

46:-Swinburne 's test can not be performed on
[a] Shunt motor
[b] compound motor
[c] series motor
[d] All the above

47:-Which of the following are used as constant speed drive
[a] Dc shunt motor
[b] DC series motor
[c] DC compound motor
[d] All the above

48:-No load slip of an induction motor is
[a] Large
[b] No slip
[c] Very small
[d] None of the above

49:-The relative advantage of a cage motor over a wound rotor motor of same power is
[a] Cage motor is More efficient
[b] Cage motor is less cost
[c] Better operating power factor
[d] All the above

50:-The maximum torque of an induction motor is proportional to
[a] Square of supply voltage
[b] Supply voltage
[c] Reciprocal of the square of supply voltage
[d] None of the above

51:-A synchronous motor runs on
[a] AC only
[b] DC only
[c] Both ac and dc
[d] None of the above

52:-If the armature coil of a DC machine is N turns then Number of conductors of any coil side
[a] 2N
[b] N/2
[c] N²
[d] N

53:-The distance between two consecutive and similar top coil side is called
[a] Back pitch
[b] Front pitch
[c] Winding pitch
[d] Commutator pitch

54:-In lap wound machine the number of brushes used is equal to
[a] number of poles
[b] 2
[c] number of turns
[d] number of commutator segments

55:-A mooving iron instrument can measure
[a] AC
[b] AC & DC
[c] DC
[d] Pulse

56:-The emf developed in any physical system act in such a direction to tend to
[a] Decrease co energy at constant mmf
[b] Decrease the co energy at constant flux
[c] Increase the co energy at constant mmf
[d] Increase the co energy at constant flux

57:-The factor to be considered while selecting the site of a hydel power plant
[a] Quantity of water available
[b] Head of water
[c] Accessibility of the site
[d] All the above

58:-Specific speed of a turbine is the speed at which it develop 1 metric HP under the head of
[a] 1 metric meter
[b] 1 meter
[c] 1 feet
[d] 1 cubic meter

59:-The active recovery voltage depends on
[a] Power factor
[b] Armature reaction
[c] Circuit condition
[d] All the above

60:-The highest current that a circuit breaker is capable of breaking at recovery and re striking voltage is
[a] Breaking capacity
[b] Making capacity
[c] Recovery current
[d] recovery voltage

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