2023 2024 Student Forum > Management Forum > Main Forum

 
  #2  
29th November 2014, 09:52 AM
Super Moderator
 
Join Date: Apr 2013
Re: NCPIL Scientific Assistant Model question paper

You are looking for NCPIL Scientific Assistant Electronics Model question paper, I am giving here:

1.
The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?

A. 8.8 V
B. 88 V
C. 880 V
D. 8,800 V


2.
To step 110 V ac down to 20 V ac, the turns ratio must be

A. 5.5 B. 18
C. 0.18 D. 0.018


3.
The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is

A. 2 mH
B. 2 H
C. 4 H
D. 8 H


4.
If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is

A. 25 W
B. 0 W
C. 250 W
D. 2.5 W


5.
A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, RL, is 120 . What is the approximate voltage across the load?

A. 7.3 V
B. 73 V
C. 88 V
D. 880 V

6.
What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?

A. 4 kVA
B. 0.25 kVA
C. 16 kVA
D. 8 kVA


7.
The turns ratio required to match an 80 source to a 320 load is

A. 80 B. 20
C. 4 D. 2


8.
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is

A. 12 V
B. 120 V
C. 240 V
D. 2,400 V


9.
If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ?

A. 250
B. 25
C. 6,250
D. 62,500


10.
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

A. 0.2 B. 0.4
C. 5 D. 25
  #3  
21st February 2016, 01:07 PM
Unregistered
Guest
 
Re: NCPIL Scientific Assistant Model question paper

Hello sir I want to prepare for NCPIL Scientific Assistant exam so here can you please give me Model question paper ?
  #4  
21st February 2016, 01:07 PM
Super Moderator
 
Join Date: May 2012
Re: NCPIL Scientific Assistant Model question paper

Hey as The Nuclear Power Corporation of India Limited is an authorized organization working under the Government of India

Here I am giving you NCPIL Scientific Assistant Model question paper


1.The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?

A. 8.8 V

B. 88 V

C. 880 V

D. 8,800 V
2.To step 110 V ac down to 20 V ac, the turns ratio must be

A. 5.5

B. 18

C. 0.18

D. 0.018

3.The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is

A. 2 mH

B. 2 H

C. 4 H

D. 8 H


4.If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is

A. 25 W

B. 0 W

C. 250 W

D. 2.5 W


5.A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, RL, is 120 . What is the approximate voltage across the load?

A. 7.3 V

B. 73 V

C. 88 V

D. 880 V

6.What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?

A. 4 kVA

B. 0.25 kVA

C. 16 kVA

D. 8 kVA

7.The turns ratio required to match an 80 source to a 320 load is

A. 80

B. 20

C. 4

D. 2

8.When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is

A. 12 V

B. 120 V

C. 240 V

D. 2,400 V

9.If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ?

A. 250

B. 25

C. 6,250

D. 62,500

10.A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

A. 0.2

B. 0.4

C. 5

D. 25


Quick Reply
Your Username: Click here to log in

Message:
Options

Thread Tools Search this Thread



All times are GMT +5. The time now is 10:25 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
SEO by vBSEO 3.6.0 PL2

1 2 3 4