PAPER : SSC CENTRAL POLICE ORGANIZATION (CPO) SUB-INSPECTORS EXAM, SOLVED PAPER

PART - 3

46. The period of revolution of a geostationary satellite is
(a) 24 hours (b) 30 days.
(c) 365 days. (d) changing, continuously.

47. The type of mirrors used in the headlamp of cars is
(a) parabolic concave (b) plane
(c) spherical convex (d) cylindrical concave

48. Nuclear explosive devices were tested in India at
(a) Sriharikota (b) Bangalore
(c) Pokharan (d) Kanchipuram

49. The gradation and standardization of agricultural products are conducted through
(a) Food Corporation of India.
(b) Directorate of Marketing and Inspection.
(c) Indian Standards Institution.
(d) Central Statistical Organization.

50. The luster of the metals is because of
(a) high density, due to closed packing of atoms.
(b) high polish
(c) reflection of light due to the presence of free electrons.
(d) absorption of light due to the presence of cavities

51. Flat footed camels can walk easily in sandy deserts because
(a) pressure on the sand is decreased by increasing the area of the surface in contact.
(b) pressure on the stand is increased by increasing the area of the surface in contact.
(c) pressure on the sand is decreased by decreasing the area of the surface in contact.
(d) pressure on the sand is increased by decreasing the area of the surface in contact.

52. The reason for a swimming pool to appear less deep than the actual depth is
(a) refraction. (b) light scattering.
(c) reflection. (d) interference.

53. Alternating current is converted into direct current by a
(a) transformer. (b) dynamo
(c) oscillator. (d) rectifier.

54. German silver used for making utensils is an alloy of
(a) copper, silver, nickel. (b) copper, zinc, nickel.
(c) copper, zinc, aluminium (d) copper, nickel, aluminium.

55. Which one of the following is used to dissolve noble metals?
(a) Nitric acid (b) Hydrochloric acid
(c) Sulphuric acid (d) Aqua regia.

56. Gunpowder was invented by
(a) Roger Bacon. (b) Colt.
(c) C.V. Raman. (d) Dr. Gatting.

57. The purity of gold is expressed in carats. The purest form of gold is
(a) 24 carats. (b) 99.6 carats.
(c) 91.6 carats. (d) 22 carats.

58. Petroleum consists of a mixture of
(a) Carbohydrates. (b) Carbonates.
(c) Hydrocarbons. (d) Carbides.

59. For which invention is Otto Hahn famous?
(a) Atom bomb. (b) Television
(c) X-rays (d) Miner’s safety lamp.

60. Which one of the following is not a plant product?
(a) Caffeine (b) Piperine
(c) Nicotine (d) Saccharin.

PART - 3

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