Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Instrument Mechanic' And exam conducted in the year 2023. And Question paper code was '158/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
C:-Frequency is equal to resonance frequency
D:-Frequency is zero
Correct Answer:- Option-A
Question17:-If the maximum value of dynamically induced emf produced in a
conductor a DC generator is 100V, then what will be the value of induced emf when
the conductor cuts the magnetic field at 30°?
A:-50 Volts
B:-100 Volts
C:-30 Volts
D:-86 Volts
Correct Answer:- Option-A
Question18:-What is the formula used to calculate the back emf of a DC motor?
A:-Eb = V + la Ra
B:-Eb = V-laRa
C:-Eb = V x la Ra
پر - 6ت5 0ا
Correct Answer:- Option-B
Question19:-Which single phase A.C motor is classified under commutator type
motor?
A:-Stepper motor
B:-Repulsion motor
C:-Shaded pole motor
D:-Permanent capacitor motor
Correct Answer:- Option-B
Question20:-A 3 phase 415 V, 60 Hz, 6 pole induction motor is running at 960 RPM.
Calculate the rotor frequency?
A:-50 Hz
B:-6 Hz
C:-2 Hz
D:-12 Hz
Correct Answer:- Option-D
Question21:-A 2000/200 volt, 20 kVA, 50 Hz single phase transformer has 66 turns
in secondary winding and 660 turns in primary winding. Calculate the primary
current.
A:-100 A
8:-200 ^
C:-10A
0:- ۸