GKToday's Full Length UPSC CSE (Prelims) Test Series - 2019

UPSC Prelims Test Series 2019 – Mock Test-18

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61. On heating a pure silicon circular disc with a circular hole at the centre, the diameter of the hole:

[A] will expand
[B] will contract
[C] will remain constant
[D] may expand or contract

62. The speed of an artificial satellite depends upon:

Mass of the satellite
Radius of orbit for the satellite
Mass of the central body about which the satellite orbits
Gravitational constant

Select the correct option from codes given below:

[A] Only 2 & 3
[B] Only 2, 3 & 4
[C] Only 1, 2 & 4
[D] 1, 2, 3 & 4

63. With reference to the birth and death of stars, consider the following general observations:

The fate of a star after its nuclear fuel burns out, depends on the mass it was born with
When the star exhausts its nuclear fuel, gravity causes it to collapse & shrink
White dwarfs are one of the densest forms of matter in the universe, next only to black holes

Which among the above observations is / are correct?

[A] Only 1
[B] 1 & 2
[C] 1, 2 & 3
[D] 2 & 3

64. The pointer or arrow of the magnetized needle of a compass indicates which among the following?

[A] Geographic North Pole
[B] Magnetic North Pole
[C] Geo-magnetic North Pole
[D] Magnetic South Pole

65. The "black box" is vital equipment in understanding the causes of aviation accidents. Which of the following statements is/are correct about the "black box"?

The "black box" is painted black so that it is easily recoverable after accident
It functions both as voice recorder as well as flight data recorder

Select the correct option from codes given below:

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 nor 2

66. Snow looks white, but water looks generally colourless. What could be the possible explanation to this?

[A] Snow Crystal reflect the light
[B] Snow absorbs all colors except white
[C] Snow refracts the white wavelengths of light
[D] Snow changes the direction of light

67. The major difference between cartilage and bone is that:

[A] While Bone is a part of skeletal system, cartilage is a part of some other system
[B] While bone is made of collagen and calcium salts, cartilage is made of only collagen
[C] While bones have blood vessels, Cartilage have no blood vessels
[D] All of the above statements are correct

68. The roots of which of the following plants are home to a variety of Nitrogen fixation bacteria?

Pea
Sugarcane
Sugarbeet

Select the correct option from the codes given below:

[A] Only 1
[B] Only 1 & 2
[C] Only 1 & 3
[D] 1, 2 & 3

69. Enhancing the ‘Seed Replacement Rates’ of various crops helps in achieving optimal production. However, India’s seed replacement ratio is dismal in case of most crops. What is / are the reasons for the same?

There is no National Seeds Policy in India
Demand supply gap in case of low value, high volume crops
Private companies are not allowed to sell seeds of crops related to food security

Select the correct option from the codes given below:

[A] Only 1 & 2
[B] Only 2
[C] Only 2 & 3
[D] 1, 2 & 3

70. Which of the following denotes "Market Capitalization"?

[A] Current market value of its authorized capital of a company
[B] Current market value of its issued shares of a company
[C] Current market value of its paid-up capital of a company
[D] Current market value of shares outstanding of a company

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GKToday's Full Length UPSC CSE (Prelims) Test Series - 2019

UPSC Prelims Test Series 2019 – Mock Test-18

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