RRB NTPC 2021-07-01-2021-1 RRB Question Paper

RRB NTPC 2021 - Graduate Level and Undergraduate Level Question Papers

RRB NTPC 2021-07-01-2021-1 RRB Questions

41.
A positively charged ion is called a/an:
A.
anion
B.
cation
C.
molecule
D.
atom
ANSWER :
B. cation
42.
Three electronic bells are fixed in three adjoining temples. The priests of these temples decided to ring the bells at different times with the intervals of 2, 3 and 5 min. If the bells start tolling together for the first time at 8:00:00 in the morning, up to 9:00:00 in the morning they will toll together:
A.
5 times after the starting time
B.
2 times after the starting time
C.
15 times after the starting time
D.
4 times after the starting time
ANSWER :
B. 2 times after the starting time
43.

The denominator of a fraction is 2 more than the numerator. When the numerator is multiplied by 3 and the denominator is multiplied by 2 the fraction becomes \( \frac{1}{2} \). The given fraction is:

A.

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

B.

\( \frac{1}{3} \)

C.

\( \frac{1}{4} \)

D.

\( \frac{2}{5} \)

ANSWER :

B. \( \frac{1}{3} \)

44.

Devesh leaves his home every day at 7 a.m. and reaches office at 8:30 a.m. One day he left his home at 7 a.m. but travelled a fifth of the distance at \( \frac{5}{6} \) of the usual speed and the rest of the distance at \( \frac{6}{5} \) of the usual speed. Approximately at what time did Devesh reach office on that day?

A.

8:40 a.m.

B.

8:25 a.m.

C.

8:21 a.m.

D.

8:36 a.m.

ANSWER :

C. 8:21 a.m.

45.
A sector is cut off from a circle of radius 21 cm. The angle of the sector is 40 degrees. Find the area of the sector in square cm?
A.
156
B.
154
C.
144
D.
145
ANSWER :
B. 154
46.
When the side of an equilateral triangle is made three times the original side, the area of the new equilateral will become:
A.
3 times of the original area
B.
6 times of the original area
C.
9 times of the original area
D.
12 times of the original area
ANSWER :
C. 9 times of the original area
47.

The Pie Chart represents the share of savings and expenses under different heads, from the monthly salary of Manish.

If Manish's salary is ₹50,000 and he wishes to double his monthly savings and spend 50% of the balance amount on his Household expenses, by what amount would he need to reduce on the other expenses.

A.

₹20,000

B.

₹5,000

C.

₹10,000

D.

₹15,000

ANSWER :

B. ₹5,000

48.
The difference between the compound interest compounded annually and the simple interest on a certain sum of money for 2 years at 4% per annum is ₹20.00. The sum is:
A.
₹11,500.00
B.
₹8,500.00
C.
₹12,500.00
D.
₹10,500.00
ANSWER :
C. ₹12,500.00
49.
For which Indian spice did the Indian government challenge the US patenting and force them to revoke it?
A.
Clove
B.
Mustard
C.
Turmeric
D.
Cardamom
ANSWER :
C. Turmeric
50.
What type of pollution causes various diseases related to the respiratory system?
A.
Water pollution
B.
Noise pollution
C.
Air pollution
D.
Land pollution
ANSWER :
C. Air pollution