ELECTRICIAN

ELECTRICIAN
The type of switch used in Staircase wiring is............

(a) Rotary Switch

(b) Push Button

(c) Two Way Switch

(d) One Way Switch

Answer : (c) Two Way Switch

When the core becomes magnetically saturated,

the increase in magnetic field strength H

(a) Enhances B drastically

(b) Decreases the permeability of the core

(c) Increases the permeability of the core

(d) Almost has no effect on magnetic induction B.

Answer : (d) Almost has no effect on magnetic induction B.

The nominal voltage of Lead-acid cell in an open

circuit is approximately…….
(a) 2 Volts

(b) 1.5 Volts

(c) 1,25 Volts 

(d) 2.5 Volts

Answer : (a) 2 Volts

While selecting a fixed value resistor, its main

specifications to be considered are....

(a) Voltage, wattage and tolerance in percents.

(b) Voltage, Current and Size

(c) Value in Ohms, Voltage and size

(d) Value in Ohms, Wattage and tolerance of its value

Answer : (d) Value in Ohms, Wattage and 

                       tolerance of its value

The specific gravity of a Lead-acid battery's

electrolyte is measured by
(a) Hydrometer

(b) Barometer

(c) Hygrometer

(d) Pyrometer

Answer : (a) Hydrometer

Power factor of a pure resistive circuit is.................

(a) Zero

(b) Lagging

(c) Leading

(d) Unity

Answer : (d) Unity

The function of the choke coil in fluorescent

lamp circuit is.......

(a) Only to limit the operating current

(b) Only to produce starting voltage impulse

(c) To produce starting voltage impulse and to

      limit the operating current *

(d) To limit the heating cuitent of filaments

Answer : (c) To produce starting voltage impulse

                      and to limit the operating current

AC mains supply in India has the frequency of..........

(a) 100 Hz

(b) 60Hz

(c) 50 Hz

(d) 40Hz

Answer : (c) 50 Hz

The fixed value Carbon Resistors are generally

not more than......Watts.

(a) 10

(b) 6

(c) 4

(d) 2

Answer : (d) 2

In an Inductive AC circuit, current.,
(a) Lags behind the voltage by 180°
(b) Leads the Voltage by 90u
(c) Lags behind the Voltage by 90°

(d) Is in phase with the Voltage

Answer : (c) Lags behind the Voltage by 90°