ELECTRICIAN

ELECTRICIAN
In a simple circuit consisting of a resistor of value R,

when voltage V is kept constant, then
the current.,................

(a) I is a directly proportional to R

(b) I=R

(c) I is inversely proportional to R

(d) I is constant irrespective of changes in R

Answer : (c) I is inversely proportional to R

The MCB's working is based on.........................

(a) Thermal operation      

(b) Thermal and Magnetic operations

(c) Magnetic operation

(d) Simple Mechanical Switching operation

Answer : (b) Thermal and Magnetic operations

The tripping time of ELCBs is usually less than.........

(a) 30 ms

(b) 80ms
(c) 100 ms

(d) 200 ms

Answer :  (a) 30 ms

Which of the following materials is a good Insulator?
(a) Aluminium

(b) Copper

(c) Porcelain 

(d) Silver

Answer: (c) Porcelain 

Which of the following materials is a good conductor?
(a) Mica

(b) Copper

(c) Rubber

(d) Ebonite

Answer:  (b) Copper

The electrolyte used in Aluminum anodizing is dilute...........

(a) Nitric acid

(b) Aluminum sulphate solution

(c) Hydrochloric acid

(d) Sulphuric acid

Answer: (d) Sulphuric acid

The positively charged ions are called.................

(a) Cations

(b) Atoms

(c) Anions

(d) Neutrons

Answer: (a) Cations

The..........of a substance is the amount deposited

on the Electrode on passing a steady electric current

of one ampere for One second through its solution.

(a) Equivalent weight

(b) Atomic weight

(c) Electro chemical equivalent

(d) Chemical equivalent

Answer: (c) Electro chemical equivalent

The............. circuit is usually operated by

adjusting the variable resistor until no current

flows in the ammeter.

(a) Resistors in parallel

(b) Resistors in series

(c) Wheatstone bridge

(d) Feedback

Answer: c) Wheatstone bridge

Certain materials normally behave as insulators

but allow for more valence electrons to be

made available by thermal energy.

These elements are known as.........

(a) Semiconductors

(b) Conductors

(c) Insulators

(d) Conduction band

Answer: (a) Semiconductors

The...................has a hammer face which is

used to drive in nails and the other end is

used for pulling out nails from the wood.

(a) Mallet       

(b) Claw Hammer

(c) Ball Pen Hammer

(d)Axe

Answer: (b) Claw Hammer

An electrical component with resistance and

inductance elements with draw ……
(a) Leading pf Current

(b) Lagging pf Current

(c) Unity lpf Current

(d) Zero pf Current -

Answer:  (b) Lagging pf Current