RRB NTPC 2021 PYQs

Question 1

What was the code name for Pokhran Nuclear Test 2?

Accepted Answer

Pokhran-II, a series of five nuclear bomb test explosions conducted by India in May 1998, was codenamed Operation Shakti. This marked India's second nuclear test.

Question 2

If a + b + c = 14, ab + bc + ca = 47 and abc = 15 then find the value of a3+ b3+c3.

Accepted Answer

Use the identity a³+b³+c³-3abc = (a+b+c)(a²+b²+c²-ab-bc-ca). First, find a²+b²+c² using (a+b+c)² = a²+b²+c²+2(ab+bc+ca). Substitute values to get a³+b³+c³.

Question 3

In the following question, four letter pairs are given. The letters on left side of (-) is related to the letters on the right side of (-) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

Accepted Answer

The pattern is +8, -8, +8 for each letter. PSD (+8) -> KYU. SJF (+8) -> MPX. NRB (+8) -> IXS. Option 2 (ZBN - EHU) does not follow this pattern, making it the odd one out.

Question 4

Who initiated the Pradhan Mantri Jan Dhan Yojana (PMJDY)?

Accepted Answer

The Pradhan Mantri Jan Dhan Yojana (PMJDY) was launched by Prime Minister Narendra Modi on August 28, 2014, to promote financial inclusion.

Question 5

According to India's Election Commission, political parties cannot release their manifesto in pre poll silence period of:

Accepted Answer

The Election Commission of India prohibits political parties from releasing their manifesto during the 48-hour 'silence period' before polling ends. This ensures a level playing field.

Question 6

In which year was Delhi officially announced as the Capital of British India by then Emperor George V?

Accepted Answer

King George V announced Delhi as the new capital of British India during the Delhi Durbar on December 12, 1911, shifting it from Calcutta.

Question 7

The First elected Parliament of independent India came into existence in -

Accepted Answer

The first general elections in independent India were held in 1951-52, leading to the formation of the first elected Parliament in April 1952.

Question 8

Which is an international treaty among industrialized nations that sets mandatory limits on greenhouse gas emissions?

Accepted Answer

The Kyoto Protocol is an international treaty that commits industrialized countries to reduce greenhouse gas emissions, aligning with the question's description.

Question 9

Name the first lady President of the Indian National Congress.

Accepted Answer

Annie Besant was the first woman President of the Indian National Congress, presiding over the Calcutta session in 1917. This is a direct factual recall question.

Question 10

In which form is data stored in a computer?

Accepted Answer

Computers fundamentally operate using electrical signals, which are represented as binary digits (0s and 1s). All data, regardless of its original form, is converted into binary for storage and processing.

Question 11

Find the value of tan 15° + cot 15°

Accepted Answer

Use the identity tanθ + cotθ = 2/sin(2θ). Substitute θ = 15°, so 2θ = 30°. Since sin 30° = 1/2, the expression becomes 2/(1/2) = 4.

Question 12

Identify the principal organ of the UN which got suspended in 1994?

Accepted Answer

The UN Trusteeship Council suspended operations on 1 November 1994, after Palau, the last remaining UN trust territory, achieved independence.

Question 13

Which of the following Heritage sites has the Dravidian style of architecture?

Accepted Answer

Hampi, the capital of the Vijayanagara Empire, is renowned for its magnificent temples and monuments built in the Dravidian style of architecture.

Question 14

Select the option that is related to the sixth number in the same way as the third number is related to the fourth number and the first number is related to the second number.7 : 342 :: 9 : 728 :: ? : 2196

Accepted Answer

The pattern is x : (x^3 - 1). So, 7 : (7^3 - 1) = 7 : 342. And 9 : (9^3 - 1) = 9 : 728. For the last pair, 2196 = x^3 - 1, so x^3 = 2197, which means x = 13.

Question 15

In a certain code language FMOPRA is written as 834207 and KQMATL is written as 953761. How will QTMPRL be written as in that language?

Accepted Answer

Assign digits to letters based on the given codes. Q=5, T=6, M=3, P=2, R=0, L=1. Combining these gives 563201.

Question 16

The popular sword dance in the Kumaun region of Uttarakhand is called _______.

Accepted Answer

Chholiya is the traditional sword dance of the Kumaun region in Uttarakhand, performed during festivals and weddings.

Question 17

Which scheme was launched in 2014 to provide affordable access to financial services- bank account, credit, insurance, pension etc.?

Accepted Answer

The Pradhan Mantri Jan Dhan Yojana (PMJDY) was launched in August 2014 to ensure comprehensive financial inclusion, providing access to banking services.

Question 18

A man completes a journey in 10 hours. He travels the first half of the journey at the rate of 20 km/h and the second half at the rate of 30 km/h. Find the total journey he travelled in kilometres?

Accepted Answer

Let the total distance be 2D. Time = D/20 + D/30 = 10 hours. Solving for D gives D = 120 km. Total journey = 2D = 240 km.

Question 19

In a certain code language, STUDFARM is written as FGHQSNEZ. How will NUCLEAR be written as in that language?

Accepted Answer

The pattern is: each letter shifts by +15 positions. S(+15)=F, T(+15)=G, U(+15)=H, D(+15)=S, F(+15)=N, A(+15)=P, R(+15)=G, M(+15)=Z. Applying this to NUCLEAR: N(+15)=A, U(+15)=H, C(+15)=R, L(+15)=A, E(+15)=T, A(+15)=P, R(+15)=G. So, NUCLEAR becomes AHPYRNE.

Question 20

If the ratio between two numbers is 3 ∶ 5 and their LCM is 120, then the numbers are:

Accepted Answer

Let the numbers be 3x and 5x. Their LCM is 15x. Given LCM = 120, so 15x = 120, which means x = 8. The numbers are 3*8=24 and 5*8=40.