PSC Junior Instructor Draftsman Civil Model Questions and Answers

51. The coarsenses of the grains of a mineral is known as
(A) fracture
(B) texture
(C) structure
(D) lusture
Answer: B

52. The tool used for quarrying of stones is
(A) dipper
(B) jumper
(C) spalling hammer
(D) priming needle
Answer: B

53. The ingredient of the brick earth which enables the brick to retain shape
(A) alumina
(B) silica
(C) iron oxide
(D) magnesia
Answer: B

54. The board used for providing frog in bricks is known as
(A) pallet board
(B) lamin board
(C) fibre board
(D) stock board
Answer: D

55. Swelling of bricks is known as
(A) bloating
(B) lamination
(C) chuffs
(D) efflorescene
Answer: A

56. Annual rings of the tree represent is
(A) life
(B) strength
(C) density
(D) cant
Answer: A

57. The main constituent of varnish is
(A) turpentine oil
(B) petrol
(C) resin
(D) solvent
Answer: C

58. The main corrosive resisting pigment in paint is
(A) Zinc oxide
(B) Aluminium oxide
(C) Ferrous oxide
(D) Red lead
Answer: D

59. Out of the following, the material which dries quickly is
(A) paint
(B) polish
(C) enamel
(D) varnish
Answer: B

60. Poorest conductor of electricity is
(A) Aluminium
(B) Carbon
(C) Steel
(D) Silver
Answer: B

61. The depth of excavation for foundation is usually checked with a
(A) tape
(B) levelling staff
(C) ranging rod
(D) boning rod
Answer: D

62. When a brick is cut off lengthwise the cut out bricks are called
(A) Queen closer
(B) King closer
(C) Corbel
(D) Bat
Answer: A

63. To construct a 10 cm thick partition wall, preferred bond will be
(A) Flemish bond
(B) English bond
(C) Stretcher bond
(D) Header bond
Answer: C

64. The projection of tread beyond the riser is called as
(A) stringer
(B) nosing
(C) pitch
(D) baluster
Answer: B

65. The number of steps in a flight should be less than
(A) 12
(B) 3
(C) 2
(D) 5
Answer: B

66. The wedge shaped bricks forming an arch ring are called
(A) voussoirs
(B) soffit
(C) spandrils
(D) haunches
Answer: A

67. The upper convex surface of an arch is called
(A) intrados
(B) extrados
(C) soffit
(D) haunch
Answer: B

68. Apex line of a sloping roof is called
(A) rise
(B) hip
(C) ridge
(D) verge
Answer: C

69. The arrangement of supporting an existing structure by providing supports underneath, is known as
(A) piling
(B) jacking
(C) shoring
(D) underpinning
Answer: D

70. Lower edge of the inclined roof surface is called
(A) pitch
(B) eves
(C) cleat
(D) gable
Answer: B

71. In a detailed estimate the provisions for contingensis, is usually
(A) 1 percent
(B) 30 to 5 percent
(C) 10 percent
(D) 12 to 15 percent
Answer: B

72. Capacity of a flushing cistern is
(A) 10 litres
(B) 25 litres
(C) 12 to 15 litres
(D) 20 to 25 litres
Answer: C

73. While mixing cement mortar by volume, the volume of a cement bag is specified as
(A) 50 litres
(B) 35 litres
(C) 0.050 cu m
(D) 0.35 cu m
Answer: B

74. Thickness of plastering is usually
(A) 40 mm
(B) 25 mm
(C) 12 mm
(D) 6 mm
Answer: C

75. Generally the unit of measurement for partition wall is
(A) cu m
(B) sq m
(C) running metre
(D) numbers
Answer: B