RRB NTPC 2021-02-03-2021-1 RRB Question Paper

RRB NTPC 2021 - Graduate Level and Undergraduate Level Question Papers

RRB NTPC 2021-02-03-2021-1 RRB Questions

31.
Which of the following equipment is used to transform chemical energy into electrical energy?
A.
Electric motor
B.
Battery
C.
Candle
D.
Photo cell
ANSWER :
B. Battery
32.

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
statements
Some men are elephants.
Some elephants are tigers.
conclusion:
Some elephants are men.
Some tigers are elephants.

A.

Both conclusions 1 and 2 follow.

B.

Neither conclusion 1 nor 2 follows.

C.

Only conclusion 1 follows.

D.

Only conclusion 2 follows.

ANSWER :

A. Both conclusions 1 and 2 follow.

33.
Two positive numbers are in the ratio 5 : 4 and the product of their LCM and HCF is 18000. Find the sum of the two numbers.
A.
270
B.
180
C.
150
D.
900
ANSWER :
A. 270
34.

Read the given statement and conclusions carefully and decide which of the conclusions logically follow(s) from the statement.
Statement:
Despite sufficient availability of books in the libraries of educational institutions, majority of students studying in urban area's educational institutions have started using mobile phones or other electronic equipment as the main resource for seeking on/offline study material; as a consequence, there is severe decline in the use of books as study material.
Conclusions:
1) Methods of book reading should be devised.
2) A study should be conducted to know about the status of book reading.

A.

Either conclusion 1 or 2 follows.

B.

Neither conclusion 1 nor 2 follows.

C.

Only conclusion 1 follows.

D.

Only conclusion 2 follows.

ANSWER :

B. Neither conclusion 1 nor 2 follows.

35.

If θ is an acute angle and sinθ = cosθ, then 2cot²θ + sin²θ - 1 = ?

A.

\( \frac{3}{2} \)

B.

1

C.

0

D.

-1

ANSWER :

A. 3/2

36.
The total surface area of a cube of side measuring 2 m is:
A.
20 m²
B.
25 m²
C.
30 m²
D.
24 m²
ANSWER :
D. 24 m²
37.
In which state is Pokhran, the site of India's first nuclear explosion, located?
A.
Odisha
B.
Andhra Pradesh
C.
Punjab
D.
Rajasthan
ANSWER :
D. Rajasthan
38.
Visible Radiation was discovered by:
A.
Henri Becquerel
B.
Guglielmo Marconi
C.
Isaac Newton
D.
Wilhelm Rontgen
ANSWER :
C. Isaac Newton
39.
The median of 151, 153, 158, 165, 150, 140, 170, 153, 158 and 151 is:
A.
165
B.
151
C.
153
D.
140
ANSWER :
C. 153
40.
Which of the following is a basic structural and functional unit of the nervous system?
A.
Nephric
B.
Nephrons
C.
Neurons
D.
Nasopalatine
ANSWER :
C. Neurons