KPSC Junior Instructor Wireman Paper 2016

Kerala Public Service Commission Junior Instructor Wireman Paper 2016

Which one of the following fire extinguisher is suitable for electrical fire ?
(a) Halon
(b) Water
(c) Foam
(d) Liquefied chemical

The least count of steel rule is
(a) 1 mm
(b) 0.5 mm
(c) 1 cm
(d) 0.1 mm

Rawl plug tool and bit is used for
(a) Making holes in wood
(b) Making piolet holes in wood
(c) Making holes in metal sheets
(d) Making holes in bricks and concrete wall

In an atom the number of proton is
(a) Equal to the number of electrons
(b) Equal to the neutrons
(c) Equal to the nucleus
(d) Equal to zero

The flow of electrons is called
(a) Current
(b) Voltage
(c) Resistance
(d) Inductance

Which of the following equation is correct according to Ohm’s law ?
(a) R=I/V
(b) R=V/I
(c) I=R/V
(d) V=R/I

Which meter is used to measure the power ?
(a) Power factor meter
(b) Ammeter
(c) Watt meter
(d) Multimeter

In a parallel circuit the total resistance is
(a) The sum of individual resistances
(b) Equal to highest resistance value
(c) More than the smallest resistance
(d) Less than the smallest resistance of the combination

If the area of cross section of a wire with a given length is doubled it’s resistance will
(a) Be doubled
(b) Be halved
(c) Remain same
(d) Be four times more

Heat developed in a conductor is proportional to the
(a) Square of the power
(b) Square of the time
(c) Square of the current
(d) Square of the resistance

Which of the following has negative temperature coefficient of resistance ?
(a) Copper
(b) Aluminium
(c) Gold
(d) Carbon

A substance that has low retentivity cannot be used for the manufacturer of
(a) Electro magnet
(b) Permanent magnet
(c) Temporary magnet
(d) Paramagnets

The initial function of a choke in a tube light circuit is to
(a) Limit the starting current
(b) Heat up the filament
(c) Induce high voltage
(d) Keep the voltage same

Which one of the following is unit of inductance ?
(a) Henry
(b) Mho
(c) Ohm
(d) Kwh

If the frequency changes from 50 Hz keeping voltage constant, the inductive reactance of the coil connected to supply
(a) remains same
(b) become doubled
(c) become half
(d) become four times