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 : 61-80
61:-Circuit breaker intended for rapid auto re closing with rated operating duty o -m-co in which m represents
[a] Making
[b] Breaking
[c] Dead time
[d] Re closing

62:-The heat produced by an electric heating element is according to
[a] Ohm's law
[b] Stefan's law
[c] Snell's law
[d] Faraday's law

> 63:-Ajax Wyatt furnace make use of a crucible in
[a] Horizontal
[b] At an angle of 120°
[c] Vertical
[d] None of the above

64:-High frequency capacitance heating method is employed for heating
[a] Plastic
[b] Wood
[c] Dehydration of foods
[d] All the above

65:-In carbon arc welding the carbon electrode with respect to work is
[a] Negative
[b] Positive
[c] As positive or negative
[d] Non of the above

66:-The filament lamp work at a pf of
[a] .5
[b] 1
[c] .7
[d] 0

67:-Which lamp has the highest luminous efficiency
[a] Filament
[b] Neon
[c] Mercury vapor
[d] Sodium vapor

68:-In illumination space to height ratio is
[a] 1 to 2
[b] 1
[c] less than 1
[d] None of the above

69:-The induction motor cannot run at synchronous speed because if so
[a] Rotor emf would be zero
[b] Rotor current would be zero
[c] Rotor torque would be zero
[d] All the above

70:-Semi closed or totally closed slots are used in 3Ø Induction Motor essentially to
[a] Reduce magnetizing current
[b] Increase efficiency
[c] Improve starting torque
[d] Increase magnetizing current

71:-In DC machine the armature windings are placed on the rotor for effective
[a] Generation of voltage
[b] Development of torque
[c] Commutation
[d] Energy conversion

72:-The most powerful electromagnet in a normal DC machine operating at full load condition is
[a] Field winding
[b] Armature winding
[c] inter pole winding
[d] Compensating winding

73:-Which of the following is called as stray flux
[a] Armature flux
[b] Field flux
[c] Leakage flux
[d] None of the above

74:-When a coil moves through a time varying flux the induced emf present in the coil is
[a] Dynamically induced
[b] Statically induced
[c] Motional emf
[d] Both dynamically and Statically induced

75:-A 3 Ø SCIM stator rewound for 6 poles withh out any alteration in the rotor will run at a speed
[a] <1000 rpm
[b] <1500 rpm
[c] <1200 rpm
[d] 0 rpm

76:-A 3Ø star connected IM takes 20A from supply. When connected in delta the motor will take a current of
[a] 20v3 A
[b] 20/v3 A
[c] 20 A
[d] 10A

77:-The armature core of a DC machine is laminated to minimise
[a] Hysteresis loss
[b] Eddy current loss
[c] Mechanical loss
[d] Temperature loss

78:-Which part of a DC motor has the maximum flux
[a] pole core
[b] Interpole
[c] Leading pole tip
[d] Trailing pole tip

79:-The air blast circuit breaker have best application in system of operating voltage
[a] Below 132KV
[b] 132KV to 400KV
[c] Above 400KVA
[d] None of this

80:-The cheapest shielding material used in Nuclear plant is
[a] Concrete
[b] Brick
[c] Boron
[d] Cadmium

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