CSL Assistant Engineer Electrical Paper 2020

Cochin Shipyard Assistant Electrical Paper 2020
Exam Date – 10th Feb 2020

The rate of movement of charge through any conductor is known as
(a) voltage
(b) Resistance
(c) Current
(d) EMF

c

If load on a DC shunt motor is increased, its speed is decreased primarily due to
(a) increase in its flux
(b) decrease in back emf
(c) increase in armature current
(d) increase in brush drop

b

The main purpose of using core in a transformer is to
(a) Decrease iron losses
(b) prevent eddy current loss
(c) eliminate magnetic hysteresis
(d) decrease reluctance of the common magnetic circuit

d

Power factor is highest in case of
(a) sodium vapour lamps
(b) mercury vapour lamps
(c) incandescent lamps
(d) fluorescent lamps

c

In a 50 Hz AC cycle, the current reverses directions _____ times per second
(a) 50 times
(b) 100 times
(c) 2 times
(d) 25 times

b

Anemometer measures
(a) Pressure
(b) RPM
(c) Wind velocity
(d) Temperature

c

What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum valve the other is at zero value?
(a) 0 degree
(b) 45 degree
(c) 90 degree
(d) 180 degree

c

The universal gate is
(a) AND gate
(b) NAND gate
(c) OR gate
(d) None of the options

b

Which instrument is used to measure the high resistance ?
(a) Kelvin’s double bridge
(b) Wheatstone bridge
(c) Carey-foster bridge
(d) Megger

d

Which of the following quantitites cnannot be measured using a multi meter?
(a) AC Voltage
(b) DC Current
(c) Phase Angle
(d) Resistance

c

Secondary winding of an auto transformer is also called
(a) Compensating winding
(b) common winding
(c) tertiary winding
(d) damping winding

b

One unit of electrical energy equals to
(a) 1 Kwh
(b) 1 wh
(c) 10 wh
(d) 100 wh

a

The main advantage of AC transmission system over DC transmission system is
(a) easy transformation
(b) less losses in transmission over long distances
(c) less insulation problems
(d) less problem of instablility

b

Insulator that is used in low voltage distribution lines is known as
(a) shackle
(b) strain
(c) pin
(d) suspension

a

Incandescent lamp is filled by
(a) argon gas
(b) oxygen gas
(c) carbon dioxide
(d) sulphur oxide

a