Explore topic-wise MCQs in NTPC (Technical Ability).

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your NTPC (Technical Ability) knowledge and support exam preparation. Choose a topic below to get started.

1.

To measure 2 volts, if one selects \[0-100\]volt range voltmeter which is accurate within \[\pm 1%,\]the error in his/her measurement may be up to

A. \[\pm 0.02%\]
B.  \[\pm 1%\]
C. 120 kN 
D.  \[\pm 50%\]
Answer» E.
Discussion
2.

A moving iron frequency meter consists of

A.  Two inductive circuits connected in parallel
B.  One inductive and one non inductive circuit connected in parallel
C. Zero 
D.  One inductive and one non inductive circuit connected in series
Answer» E.
Discussion
3.

If an induction type energy meter runs fast, it can be slowed down by

A.  at lag adjustment
B.  light load adjustment
C. \[{{({{r}_{2}}/{{r}_{1}})}^{2}}\] 
D.  adjusting the position of braking magnet and moving it away from the centre of the disc.
Answer» E.
Discussion
4.

The ratio of maximum displacement deviation to full scale deviation of the instrument is called the

A.  static sensitivity
B.  accuracy 
C. 0.3 
D.  precision 
E.  dynamic deviation  
Answer» E.  dynamic deviation  
Discussion
5.

For measuring a low resistance by ammeter-voltmeter method, the voltmeter is connected directly across the resistance under measurement

A.  there is an error in measurement as the ammeter measures current flowing through the voltmeter in addition to the current flowing through the resistance under measurement
B.  there is an error in measurement as the voltmeter measures voltage drop across the ammeter in addition to that across the resistance under measurement
C. W  
D.  none of above
Answer» B.  there is an error in measurement as the voltmeter measures voltage drop across the ammeter in addition to that across the resistance under measurement
Discussion
6.

On testing an electric iron on megger, the reading of the megger is infinity. This indicates

A.  short circuit of the heating element
B.  short circuit of the supply terminal
C. Convert dynamic problems into equivalent static problems
D.  open circuit of the heating element
Answer» E.
Discussion