ELECTRICIAN

ELECTRICIAN

The graph between on alternating quantity

and time is called
(a) Bar graph

(b) Pie chart

(c) Curve

(d) Waveform

Answer:  (d) Waveform

The Capacitive Reactance.........

(a) Decreases as frequency increases
(c) Increases as frequency increases

(b) Applies only to series RLC circuits
(d) Increases with the time constant

Answer:  (a) Decreases as frequency increases

Pure silicon crystal atoms contain............valance

electrons as a result of covalent bonding.

(a)  2

(b)  4

(c)  8

(d) 16

Answer: (c)  8

In case of electrical short circuit of a sub-circuit in domestic connection -

(a) Throw water to extinguish the fire       

(b) Switch of the power supply first

(c) Run to intimate the po wer house

(d) Do not act

Answer: (b) Switch of the power supply first

To work on line wire the electrician should use ….

(a) Goggles

(b) Gloves

(c) Helmet

(d) Watch

Answer:  (b) Gloves

To rescue a victim from electrical shock, one should use -
(a) Iron rod

(b) Copper rod

(c) Wooden rod

(d) Aluminum rod

Answer:  (c) Wooden rod

An isometric drawing present …..
(a) Top view
(b) Front view

 (c) Side view

(d) 3D - view

Answer: (d) 3D - view

The...................is the maximum amount of

reverse voltage which can be applied on a

diode before a breakdown point is reached.

(a) Breakdown Voltage

(b) Zener Voltage .

(c) Peak Inverse Voltage

(d) Threshold Voltage

Answer: (c) Peak Inverse Voltage

The magnitude of the induced EMF in a coil is

directly proportional to the change of flux
linkages. This law is known as...............

(a) Joule's law

(b) Faraday's second law of electromagnetic induction

(c) Coulomb's law

(d) Faraday's first law of electromagnetic induction

Answer: (b) Faraday's second law of electromagnetic induction

The...... .states that the polarity of the induced

voltage will oppose the change in magnetic

flux causing the induction.

(a) Joule's law

(b) Faraday's law

(c) Coulomb's law

(d) Lenz's law

Answer: (d) Lenz's law

The........,.........materials have permeability

 slightly less than'that of free space.

(a) Paramagnetic

(b) Diamagnetic

(c) Ferromagnetic

(d) Non-magnetic

Answer: (b) Diamagnetic

The............is the property of a magnetic material

which opposes the creation of magnetic flux in it. .

(a) Resistance

(b) Reluctance

(c) Inductance

(d) Conductance

Answer: (b) Reluctance

The flux density is measured in..................

(a)Tesia

(b) Weber

(c) Ampere-turn

(d) Maxwell

Answer: (a)Tesia

The no load p.f. of a transformer is around …..

(a) Unity

(b) 0.2 lagging

(c) 0.2 leading

(d) Zero

Answer: (b) 0.2 lagging

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