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Question 431

RRB Section Controller 2016• Test

Simplify: 3x(x – 1) – 7x2 :

A. –4x2 – 3

B. –10x2 + 3x

C. –4x2 + 3x

D. –4x2 – 3x

  1. AOption (a)

    B

  2. BOption (b)

    C

  3. COption (c)

    D

  4. DOption (d)

    A

View answer & explanation

Correct answer

Answer: (c)C.

D

Why this answer is correct

Calculation:

3x(x – 1) – 7x2 

⇒ 3x × x – 3x × 1 – 7x2 

⇒ 3x2 – 3x – 7x2 

∴ –4x2 – 3x

Question 432

RRB Section Controller 2016• Test

Answer the questions based on the information given below.

If '+' is '×', '-' is '+', '×' is '÷' and '÷' is '-'

28 ÷ 16 ×  2 + 3 - 1 = ?

A. 5 

B. 9

C. 4

D. 11

  1. AOption (a)

    B

  2. BOption (b)

    D

  3. COption (c)

    A

  4. DOption (d)

    C

View answer & explanation

Correct answer

Answer: (c)C.

A

Why this answer is correct

Given,

If '+' is '×', '-' is '+', '×' is '÷' and '÷' is '-'

28 ÷ 16 ×  2 + 3 - 1 = ?

∴ 28 - 16 ÷ 2 × 3 + 1 = 28 - 8 × 3 + 1 = 28 - 24 + 1 = 5

Hence, the correct answer is A. 5.

Question 433

RRB Section Controller 2016• Test

What is the principle to be followed in a cooperative society?

A. Multiple votes

B. One man one vote

C. No vote

D. One share one vote

  1. AOption (a)

    A 

  2. BOption (b)

    C 

  3. COption (c)

    B 

  4. DOption (d)

    D 

View answer & explanation

Correct answer

Answer: (c)C.

B 

Why this answer is correct

The correct answer is B.

  • The word 'cooperative' means 'working together'.
  • This means that individuals who want to work together for the same economic purpose can form a committee. This is called a 'cooperative society'.
  • No member of the cooperative works for 'personal profit'.
  • All its members collect their resources and make maximum use of them, which they share among themselves.
  • The primary purpose of a cooperative society is to "serve its members".
  • A member has the right to vote "only one vote" irrespective of the number of shares he has.

Question 434

RRB Section Controller 2016• Test

LPG in a domestic gas cylinder is stored in- 

A. Solid State

B. Gas State

C. Liquid State

D. Can be stored at any state

  1. AOption (a)

    B 

  2. BOption (b)

    D 

  3. COption (c)

    A 

  4. DOption (d)

    C 

View answer & explanation

Correct answer

Answer: (d)D.

C 

Why this answer is correct

The correct answer is C.

  • LPG in a domestic gas cylinder is stored in a Liquid state.
  • The full form of "L.P.G." is "Liquid Petroleum Gas".
  • The domestic gas cylinder contains a mixture of propane and butane gas in 95 % and other gases in 5 %.
  • LPG is colourless and odourless, so the sulfur compound 'methyl mercaptan' is added to it to detect leakage.

Question 435

RRB Section Controller 2016• Test

Answer the questions based on the information given below.

If '+' is '×', '-' is '+', '×' is '÷' and '÷' is '-'

15 × 5 ÷ 3 + 1 - 1 = ?

A. -1

B. -2

C. 3

D. 1

  1. AOption (a)

    B

  2. BOption (b)

    C

  3. COption (c)

    A

  4. DOption (d)

    D

View answer & explanation

Correct answer

Answer: (d)D.

D

Why this answer is correct

Given,

If '+' is '×', '-' is '+', '×' is '÷' and '÷' is '-'

15 × 5 ÷ 3 + 1 - 1 = ?

∴ 15 ÷ 5 - 3 × 1 + 1 = 3 - 3 + 1 = 1

Hence, the correct answer is D. 1.

Question 436

RRB Section Controller 2016• Test

Answer the questions based on the information given below.

If '+' is '×', '-' is '+', '×' is '÷' and '÷' is '-'

9 - 3 + 2 ÷ 16 × 2 = ?

A. 7

B. 5

C. 9

D. 6

  1. AOption (a)

    A

  2. BOption (b)

    C

  3. COption (c)

    B

  4. DOption (d)

    D

View answer & explanation

Correct answer

Answer: (a)A.

A

Why this answer is correct

Given,

If '+' is '×', '-' is '+', '×' is '÷' and '÷' is '-'

9 - 3 + 2 ÷ 16 × 2 = ?

∴ 9 + 3 × 2 - 16 ÷ 2 = 9 + 6 - 8 = 7

Hence, the correct answer is A. 7.

Question 437

RRB Section Controller 2016• Test

What is the normal size of planetary paths of planets?

A. Circular

B. Parabolic

C. Elliptical

D. Conical

  1. AOption (a)

    A

  2. BOption (b)

    D

  3. COption (c)

    C

  4. DOption (d)

    B

View answer & explanation

Correct answer

Answer: (c)C.

C

Why this answer is correct

The correct answer is C.

  • The normal size of planetary 'paths of planets' are 'elliptical'.
  • Mercury is the nearest planet to the Sun and the smallest planet in the Solar System.
  • There is no atmosphere on the planet Mercury, its surface is made up of rocks and mountains.
  • There is no satellite of Venus and it is the hottest planet in the solar system.
  • Uranus was the first planet to be discovered with the help of the telescope.
  • The planet Uranus was discovered by 'William Herschel' in the year 1781 with the help of a telescope.
  • Jupiter is the largest planet in the solar system. It takes 11 years and 11 months to revolve around the Sun.

Question 438

RRB Section Controller 2016• Test

Three of the four pairs of words below are similar in some ways, and one pair is different. Which pair is different from the rest?

A. Stallion : Colt

B. Horse : Mare

C. Dog : Bitch

D. Drake : Duck

  1. AOption (a)

    D

  2. BOption (b)

    C

  3. COption (c)

    A

  4. DOption (d)

    B

View answer & explanation

Correct answer

Answer: (c)C.

A

Why this answer is correct

Given,

A. Stallion : Colt

B. Horse : Mare

C. Dog : Bitch

D. Drake : Duck

Here we see all are male and females of particular species except the Stallion : Colt in which both are male.

Hence, the correct answer is A. Stallion : Colt.

Question 439

RRB Section Controller 2016• Test

On which river is Hirakud Dam built?

A. Cauvery

B. Gandak

C. Mahanadi

D. Batarani

  1. AOption (a)

    B 

  2. BOption (b)

    A 

  3. COption (c)

    D 

  4. DOption (d)

    C 

View answer & explanation

Correct answer

Answer: (d)D.

C 

Why this answer is correct

The correct answer is Mahanadi​.

Key Points

  • The Hirakud Dam is located on the 'Mahanadi River' and its construction started in 1948, completed in 1953.
  • One of the first river valley projects in India, the Hirakud Dam is the longest (4801 m) dam in the world.
  • It is located about 290 km from the city of Bhubaneswar in the Sambalpur district of Odisha.​
  • Kaveri is flowing through Karnataka and northern Tamil Nadu.
  • It originates from the Brahmagiri mountain in the Western Ghats. Its length is usually 800 kilometres.
  • Gandak River also called the 'Narayani' river. It is located in central Nepal and northern India.

Question 440

RRB Section Controller 2016• Test

Which of the following is not one of Kepler's rules for planetary bodies?

A. A planet's orbit is an ellipse with the Sun at one of the two center-points.

B. A line segment connecting a planet and the sun makes an equal area outside during equal intervals of time.

C. The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.

D. The orbital period depends on the mass of the planet

  1. AOption (a)

    D 

  2. BOption (b)

    C 

  3. COption (c)

    B 

  4. DOption (d)

    A 

View answer & explanation

Correct answer

Answer: (a)A.

D 

Why this answer is correct

The correct answer is D.

  • German mathematician and astronomer "Kepler" gave three laws of 'planetary motion'.
  • The geocentric concept was given by the famous astronomer 'Claudius Toulmi' of Egypt.
  • According to which 'Earth is at the centre of the universe and the Sun and other planets revolve around it.'
  • The 'Heliocentric concept' was propounded by 'Copernicus'.
  • According to them, 'The Sun is at the centre of the universe and other planets including the Earth revolve around it'.
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