Kerala PSC Wireman Paper 2016

Kerala Public Service Commission Wireman Paper 2016
Maximum Marks – 100 No. of questions – 100 Duration – 1 hour 15 minutes

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

The pliers used to make wire hooks and loops is
(a) Combination pliers
(b) Long nose pliers
(c) Round nose pliers
(d) Flat nose pliers

When temperature of carbon increases, its resistance?
(a) Decreases
(b) Increases
(c) Remains same
(d) None of these

The specification of a given screwdriver is (75 mm x 0.4 mm x 2.5 mm) 0.4 mm stands for
(a) Length
(b) Thickness of tip of blade
(c) Diameter
(d) Handle length

The unit of Specific resistance is
(a) Ohm-meter
(b) Ohm/meter
(c) Ohm
(d) None of these

The unit of dielectric strength is
(a) kV/mm
(b) kW/mm
(c) Ohm/mm
(d) Ampere

The resistance of 100 W, 250 V electric lamp is
(a) 62.5 Ohms
(b) 625 Ohms
(c) 6250 Ohms
(d) 325 Ohms

The 30 ohms resistors are connected in parallel. The effective resistance of the combination will be
(a) 10 Ohms
(b) 90 Ohms
(c) 25 Ohms
(d) 15 Ohms

Three resistors 27 ohms, 47 ohms and 68 ohms are connected in parallel. What is the total resistance ?
(a) Less than 27 ohms
(b) Greater than 68 ohms
(c) between 27 to 47 ohms
(d) None of these

The type of watt meter suitable to measure DC power is
(a) Induction type
(b) Dynamo meter type
(c) LPF type
(d) None of these

If the area of a metal wire of a given length is doubled, its resistance will be
(a) Doubled
(b) Halved
(c) Remains same
(d) Four times more

Which one of the following is called as valance electron in an atom?
(a) No. of electrons in inner orbit
(b) No. of electrons in the N shell
(c) No. of electrons in the outer most orbit
(d) No. of electrons in the M Shell

Interpoles are connected in
(a) Series with armature
(b) Series with field
(c) Parallel with armature
(d) None of these

Cells are connected in series to get
(a) More voltage
(b) More current
(c) More power
(d) None of these

No load test on a transformer is conducted to measure
(a) Copper loss
(b) Core loss
(c) Total loss
(d) Efficiency