Electrical Engineering STA CEPTAM Exam Question Paper
CEPTAM 2022 STA Exam Sample Paper
DRDO STA Electrical Model Question Paper
This model paper is also useful for ISRO Technical Assistant and SAIL Trainee Recruitment Exam
1. Which of the following is the best inverter?
(a) square wave inverter
(b) sine wave inverter
(c) pure sine wave inverter
(d) triangular wave inverter
2. For driving a motor in a tape recorder or record player, the motor used is generally:
(a) a synchronous motor
(b) a hydraulic motor
(c) an induction motor
(d) a dc series motor
3. The DC motor starter used with a constant speed shunt motor is:
(a) 2 point starter
(b) 3 point starter
(c) 4 point starter
(d) 5 point starter
4. A commutator in a DC motor converts
(a) AC to DC
(b) DC to AC
(c) Both AC to DC and DC to AC
(d) None of these
5. Two transformers running in parallel will share the load according to their:
(a) leakage reactance
(b) pu impedance
(c) efficiency
(d) rating
6. The size of the Earth Wire is determined by:
(a) the ampere capacity of the service wires
(b) the atmospheric conditions
(c) the voltage of service wires
(d) none of these
7. The function of lightning arrester is:
(a) to limit the short circuit fault current
(b) to provide path to high voltage surge to earth
(c) to reduce arcing
(d) none of these
8. Surge protector provide:
(a) high impedance to normal voltage
(b) low impedance to surge
(c) both (a) and (b)
(d) none of these
9. Earthing is necessary to give protection against
(a) voltage fluctuation
(b) overloading
(c) danger of electric shock
(d) high temperature of conductors
10. The primary function of fuse is to
(a) protect the appliance
(b) open the circuit
(c) prevent excessive current
(d) protect the line
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