RRB JE 2019-24-05-2019-2 RRB Question Paper

RRB JE 2019 Question Papers

RRB JE 2019-24-05-2019-2 RRB Questions

21.
Which of the following pollutants is the major contributor to photochemical smog?
A.
Hydroperoxides
B.
Ozone
C.
Nitrogen dioxide
D.
Peroxynitrates
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ANSWER :
B. Ozone
22.

What is the maturity value of Rs.25,000 at the end of 2 years at 9.25% Simple Interest?

A.

Rs.29,625

B.

Rs.30,225

C.

Rs.29,250

D.

Rs.28,000

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ANSWER :

A. Rs.29,625

23.
P, Q and R can do some work in 11 days, 20 days and 55 days respectively.
In how many days can the work be done, if P gets the assistance of Q and R on alternate days?
A.
7
B.
9
C.
8
D.
10
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ANSWER :
C. 8
24.
What is the chemical name of quick lime?
A.
Calcium carbonate
B.
Hydrogen sulphide
C.
Calcium oxide
D.
Sodium carbonate
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ANSWER :
C. Calcium oxide
25.
Which of these helps to diagnose a heart problem?
A.
BCG
B.
EEG
C.
ECG
D.
ECT
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ANSWER :
C. ECG
26.
Which antibiotic was discovered by Alexander Fleming in 1928?
A.
Erithromycin
B.
Azithromycin
C.
Penicillin
D.
Streptomycin
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ANSWER :
C. Penicillin
27.
__________ is an oil yielding plant.
A.
Groundnut
B.
Mango
C.
Potato
D.
Tomato
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ANSWER :
A. Groundnut
28.
______ is an important metal to form amalgam.
A.
Tungsten
B.
Mercury
C.
Aluminium
D.
Iron
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ANSWER :
B. Mercury
29.

If x = r sin A cos B, y = r sin A sin B and z = r cos A, then find x² + y² + z².

A.

2r²

B.

\( \frac{3}{2} \) r²

C.

r²

D.

r²(cos² B + cos² A)

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ANSWER :

C. r²

30.
Five times a positive integer is 3 less than twice its square.
Find the integer.
A.
2
B.
5
C.
3
D.
8
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ANSWER :
C. 3