RRB NTPC 2021-04-02-2021-1 RRB Question Paper

RRB NTPC 2021 - Graduate Level and Undergraduate Level Question Papers
RRB NTPC 2021-04-02-2021-1

RRB NTPC 2021-04-02-2021-1 RRB Questions

31.
The minimum value of \( 11\sin ^{2}\theta + 12\cos ^{2}\theta \) is:
A.
12
B.
0
C.
11
D.
1
😑 View Answer Error
ANSWER :
C. 11
32.

Select the Venn diagram that best represents the relationship between the following classes. Women, Married women, Lady doctor.

A.

A

B.

C

C.

B

D.

D

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ANSWER :

B. C

33.

If sin θ − cosec θ = \(\sqrt{2}\), then the value of \( \sin ^{3}\theta - \operatorname{cosec} ^{3}\theta \) is:

A.

2\(\sqrt{3}\)

B.

0

C.

\(\frac{1}{\sqrt{2}}\)

D.

5\(\sqrt{2}\)

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ANSWER :

D. 5\(\sqrt{2}\)

34.
The approach based on the idea that 'organisms which are more distantly related will accumulate a greater number of differences in their DNA' is called?
A.
The DNA study
B.
Morphological approach
C.
Molecular phylogeny
D.
Metamorphosis
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ANSWER :
C. Molecular phylogeny
35.
The capacity of two pots is 132 litres and 69 litres, respectively. Find the maximum capacity of a container that can exactly measure the content of the two pots.
A.
3040 cc
B.
3060 cc
C.
3000 cc
D.
3080 cc
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ANSWER :
C. 3000 cc
36.

The sum of two numbers is 40. Their HCF and LCM are 2 and 102, respectively. The sum of the reciprocals of the same two numbers is:

A.

\( \frac{5}{17} \)

B.

\( \frac{10}{51} \)

C.

\( \frac{7}{19} \)

D.

\( \frac{8}{19} \)

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ANSWER :

B. \( \frac{10}{51} \)

37.
Valence electrons are present in the:
A.
innermost as well as outermost shell of an atom
B.
innermost shell of an atom
C.
just outside an atom
D.
outermost shell of an atom
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ANSWER :
D. outermost shell of an atom
38.
If x : y = 4 : 3, then the value of \( x^{3} - y^{3} \) : \( x^{3} + y^{3} \) is:
A.
36 : 91
B.
38 : 91
C.
39 : 91
D.
37 : 91
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ANSWER :
D. 37 : 91
39.
Kharai Camels are known to mainly feed on:
A.
Cactus
B.
Mangroves
C.
Joshua tree
D.
Brittlebush
😑 View Answer Error
ANSWER :
B. Mangroves
40.
Which of the following countries follows more than one time zone?
A.
USA
B.
Argentina
C.
China
D.
India
😑 View Answer Error
ANSWER :
A. USA
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