Monday, 29 October 2012

Switchgear Protections Multiple Choice Questions and Answers Preparation for Competition exams pdf



1.    The main function of a fuse is to
(a)     protect the line
(b)     open the circuit
(c)    protect the appliance
(d)    prevent excessive currents
(e)    none of the above
Ans: d

2.    On which of the following routine tests are conducted ?
(a)    Oil circuit breakers
(b)    Air blast circuit breakers
(c)    Minimum oil circuit breakers
(d)    All of the above
Ans: d
3.    SF6 gas
(a)    is yellow in colour
(b)    is lighter than air
(c)    is nontoxic
(d)    has pungent small
(e)    none of the above
Ans: c
 

4. The arcing contacts in a circuit breaker are made of
(a)     copper tungsten alloy
(b)     porcelain
(c)    electrolytic copper
(d)    aluminium alloy
Ans: a

5. Which  of the following  medium is employed for extinction of arc in air circuit breaker ?
(a) Water   
(b) Oil
(c) Air   
(d) SF6
Ans: c

6. With which of the following, a circuit breaker must be equipped for remote operation ?
(a) Inverse time trip
(b) Time-delay trip
(c) Shunt trip   
(d) None of the above
(e) All of the above
Ans: c

7.    Fault diverters are basically
(a) fuses   
(b) relays
(c) fast switches    
(d) circuit breakers
Ans: c

8.    A thermal protection switch can protect against
(a) short-circuit     
(b) temperature
(c) overload   
(d) over voltage
Ans: c

9.    Arc in a circuit behaves as
(a)     a capackive reactance
(b)     an inductive reactance
(c)    a resistance increasing with voltage rise across the arc
(d)    a resistance decreasing with voltage rise across the arc
Ans: d

10.    Thermal circuit breaker has
(a)    delayed trip action
(b)    instantaneous trip action
(c)    both of the above
(d)    none of the above
Ans: a

Read More Switchgear Protections Questions and Answers => Click Here

8 comments:

bimal *b* said...

Really helpful question *b*

Venkatesh Rajendran on 27 October 2013 at 10:58 said...

superb work but how could i copy? or take this as a softcopy,
it won't works why?

Beradiya Anil on 18 December 2013 at 21:52 said...

how can i copy it?

Anonymous said...

thanks again *21.12.2015 *bim

shubham kawale on 26 April 2016 at 23:35 said...

Que 45 ans D

shubham kawale on 26 April 2016 at 23:51 said...

Que 88 ans D

Anonymous said...

this 109 question totally copy paste from r.k.rajput book..plz give some diffrent qustion which will be helpful for us.

Ganpat Mali on 17 September 2016 at 22:31 said...

if u want to save than use google crome to fist open web than
select option print than save as a pdf.

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