RRB NTPC 2016 PYQs

Question 1

Increase in carbon dioxide in atmosphere is caused by which of the following reasons?1. Excessive use of fossil fuels2. Deforestation3. Increased number of vehicles4. Excessive use of solar heaters

Accepted Answer

Excessive fossil fuel use, deforestation, and increased vehicles all release CO2. Solar heaters use renewable energy and do not contribute to CO2 emissions.

Question 2

Aparna said, “That man is my brother’s wife's son’s only paternal uncle’s father". How is the man related to Aparna?

Accepted Answer

Break down the relation: brother's wife's son is nephew. Nephew's only paternal uncle is Aparna's brother. Brother's father is Aparna's father.

Question 3

Calculate the amount if ₹ 400 is invested on compound interest at the rate of 5% per annum for 2 years.

Accepted Answer

Using the compound interest formula A = P(1 + R/100)^T, substitute P=400, R=5, T=2. Calculate A = 400(1 + 5/100)^2 = 400(1.05)^2 = 400 * 1.1025 = 441.

Question 4

Which of the following atoms has the largest diameter‘?

Accepted Answer

Atomic radius increases down a group in the periodic table. Among halogens, Iodine is at the bottom, hence it has the largest diameter.

Question 5

If the ratio of the angles of a triangle is 2 : 4 : 3, then what is the sum of the smallest angle of the triangle and the largest angle of the triangle?

Accepted Answer

The sum of angles in a triangle is 180°. The ratio is 2:4:3, so angles are 2x, 4x, 3x. 2x+4x+3x = 9x = 180°, thus x=20°. Smallest angle is 2x=40°, largest is 4x=80°. Their sum is 40°+80°=120°.

Question 6

Which among the following network topologies has the highest transmission speed?

Accepted Answer

LANs (Local Area Networks) are designed for short distances, offering the highest transmission speeds compared to MANs and WANs, which cover larger geographical areas.

Question 7

Directions (Qs 70-72): Read the information given below and answer the questions that follow:
Information about the number of candidates, who appeared, qualified and then were selected in a competitive examination from Delhi over the years 1997 to 2001 is given below.
Year
Appeared
Qualified
Selected
1997
8000
850
94
1998
4800
500
48
1999
7500
640
82
2000
9500
850
90
2001
9000
800
70

What is the average number of candidates selected over the given period (round it to the nearest integer)?

Accepted Answer

Sum all selected candidates (70+80+60+90+85=385). Divide by the number of years (5). 385/5 = 77. Rounding to the nearest integer gives 77.

Question 8

On dividing 15y3– 30y2+ 12y −12 by 3y – 6 , the remainder is :

Accepted Answer

Using the Remainder Theorem, set the divisor 3y - 6 = 0, so y = 2. Substitute y = 2 into the polynomial P(y) = 15y³ – 30y² + 12y – 12 to find the remainder: P(2) = 15(8) - 30(4) + 12(2) - 12 = 120 - 120 + 24 - 12 = 12.

Question 9

Directions (Qs 70-72): Read the information given below and answer the questions that follow:
Information about the number of candidates, who appeared, qualified and then were selected in a competitive examination from Delhi over the years 1997 to 2001 is given below.
Year
Appeared
Qualified
Selected
1997
8000
850
94
1998
4800
500
48
1999
7500
640
82
2000
9500
850
90
2001
9000
800
70

In which year is the lowest percentage of candidates selected over those appeared?

Accepted Answer

Calculate the percentage of selected candidates for each year. The year with the lowest percentage is 2001, as (100/8000)*100 = 1.25%.

Question 10

Read the statements and select a conclusion from thegiven alternatives:Statements:Some benches are autos.All the boxes are autos.All the pens are benches.Conclusions:(1) Some benches are boxes.(2) No pen is auto.(3) Some boxes are benches.

Accepted Answer

Draw Venn diagrams for the statements. 'All boxes are autos' and 'All pens are benches' don't guarantee direct connections between benches and boxes, or pens and autos. Thus, none of the conclusions necessarily follow.

Question 11

Directions (Qs 70-72): Read the information given below and answer the questions that follow:
Information about the number of candidates, who appeared, qualified and then were selected in a competitive examination from Delhi over the years 1997 to 2001 is given below.
Year
Appeared
Qualified
Selected
1997
8000
850
94
1998
4800
500
48
1999
7500
640
82
2000
9500
850
90
2001
9000
800
70

For which year, is the ratio of number of candidates who were selected to the number of candidates who qualified the highest?

Accepted Answer

Calculate the ratio (selected/qualified) for each year. For 1999, the ratio is 280/3850 ≈ 0.0727, which is the highest among the given options.

Question 12

Indian has the largest area under ____________ crop in the World.

Accepted Answer

India has the largest area under sugarcane cultivation globally. This makes it a significant producer of sugarcane.

Question 13

Rita invested a sum at 2.5% rate for 4 years. Sita invested the same amount at the same rate for 6 years. What is the ratio of the simple interest earned by Sita to that earned by Rita?

Accepted Answer

Simple interest is proportional to time when principal and rate are constant. The ratio of interests will be the ratio of their investment periods, which is 6:4 or 3:2.

Question 14

The longest chord in a circle is:

Accepted Answer

The diameter is defined as the longest chord that passes through the center of a circle. All other chords are shorter than the diameter.

Question 15

Which of the following is NOT a solution of the equation 3x − 4y = 8?

Accepted Answer

Substitute each option's x and y values into the equation 3x - 4y = 8. The option that does not satisfy the equation (i.e., 3x - 4y ≠ 8) is the correct answer.

Question 16

Read the statement and select a conclusion from the given alternatives:Statement:Good health is a luxury in country ‘X’ where rate of mortality due to hunger, malnutrition and unhygienic conditions is very high as compared to other nations of that region.Conclusions:I. People in country ‘X’ can’t afford to have many luxuries life.II. Good health is a gift of nature.Choose the right option

Accepted Answer

The statement implies that good health is rare and expensive in country X. This directly supports conclusion I, as luxuries are unaffordable. Conclusion II is a general statement, not derived from the specific context.

Question 17

Based on the statement(s) given below, choose the best possible conclusion(s) that follows:Statements:A. In a T20 match, the total runs made by a team was 210.B. Out of these 147 runs were made by the spinners.Conclusions:I. 70% of the team consists of spinners.II. The opening batsmen were spinners.

Accepted Answer

The statements only provide information about runs scored by spinners, not the number of spinners or their batting positions. Therefore, neither conclusion can be logically derived.

Question 18

Which mirror is preferred as a rear-view (wing) mirrors in vehicles because of its wider field of view?

Accepted Answer

Convex mirrors diverge light, creating a wider field of view and forming virtual, erect, and diminished images, making them ideal for rear-view mirrors.

Question 19

If‘+’ means ‘×’, ‘−’ means ‘÷’, ‘×’ means ‘+’ and ‘÷’ means ‘−‘then what is the value of:208 − 4 + 3 ÷ 23 × 57

Accepted Answer

Substitute the symbols as given: 208 ÷ 4 × 3 - 23 + 57. Follow BODMAS: 52 × 3 - 23 + 57 = 156 - 23 + 57 = 133 + 57 = 190.

Question 20

The main objectives of Indian Space programme are:1. Mass Communication and education via Satellite2. Survey and Management of Natural resources through remote sensing technology, environmental monitoring and meteorological forecasting3. Development of indigenous satellite and satellite launch vehicles

Accepted Answer

The Indian Space Programme aims for all three objectives: mass communication/education, natural resource management via remote sensing, and indigenous development of satellites and launch vehicles.