RRB NTPC 2021-01-02-2021-2 RRB Question Paper

RRB NTPC 2021 - Graduate Level and Undergraduate Level Question Papers

RRB NTPC 2021-01-02-2021-2 RRB Questions

21.
The best method to dispose of biological wastes from hospitals is:
A.
sending them to a landfill
B.
incineration
C.
decomposition
D.
burning
😑 View Answer Rough Work
ANSWER :
B. incineration
22.
What is the distance of a vehicle from a tower of 150 m, if the angle of depression to the vehicle is 45°?
A.
125 m
B.
150 m
C.
175 m
D.
200 m
😑 View Answer Rough Work
ANSWER :
B. 150 m
23.

What will the value of the following expression be?
\(\frac{6+3}{3}\) - 5 × (4+5)

A.

24

B.

-42

C.

-24

D.

42

😑 View Answer Rough Work
ANSWER :

B. -42

24.
Find the HCF of
12 × 15, 15 × 21, 21 × 12
A.
9
B.
27
C.
3
D.
1
😑 View Answer Rough Work
ANSWER :
A. 9
25.
In an election a candidate with 37% votes loses by a difference of 520000 votes to the winning candidate. What is the total number of votes cast in that election with two contestants?
A.
1700000
B.
2200000
C.
1500000
D.
2000000
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ANSWER :
D. 2000000
26.
With which of the following is the 'Green Revolution' related?
A.
Milk production
B.
Food and grain production
C.
Fish production
D.
Oil and seed production
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ANSWER :
B. Food and grain production
27.
Which of the following in the air turns silver articles black (when exposed to air)?
A.
Chlorine
B.
Carbon
C.
Sulphur
D.
Nitrogen
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ANSWER :
C. Sulphur
28.

What is the value of \(\frac{4+\sqrt{2}}{\sqrt{2}+1}\)?

A.

2 - 3\(\sqrt{2}\)

B.

3\(\sqrt{2}\) - 2

C.

3\(\sqrt{2}\)

D.

3\(\sqrt{2}\) + 2

😑 View Answer Rough Work
ANSWER :

B. 3\(\sqrt{2}\)- 2

29.
Select the letter from among the given options that can replace the question mark (?) in the following series.
H3K9N15Q21?
A.
T
B.
V
C.
U
D.
S
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ANSWER :
A. T
30.
What is the ratio of volumes of two spheres where the curved surface areas are in the ratio of 1 : 4?
A.
1 : 4
B.
8 : 1
C.
1 : 8
D.
8 : 13
😑 View Answer Rough Work
ANSWER :
C. 1 : 8