Fitter – Semester 2, Module 1

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Fitter – Semester 2, Module 1 - Drilling

Common for All Fitter Trade 1st Year part -3

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

77 : What is the angle of countersink tool used on holes to be threaded? *

2 points

A : 75°

B : 80°

C : 90°

D : 120°

78 : What is the formula to calculate the blank size of external thread (where p=pitch and d=depth)? *

2 points

A : D = d – p/10

B : D = d + p/10

C : D = d x p/10

D : D = d ÷ p/10

79 : What is the name of the die? *

2 points

A : Split die

B : Half die

C : Solid die

D : Adjustable screw plate die

80 : Which type of thread, the crest and roots are rounded to form a semi circle? *

2 points

A : Acme thread

B : Square thread

C : Knuckle thread

D : Trapezoidal thread

81 : What 5 denotes in grinding wheel specification 41A46H5U8? *

2 points

A : Bond

B : Abrasive

C : Structure

D : Grain size

82 : Which type of bonded wheel is used in foundries for dressing castings? *

2 points

A : Silicate bond

B : Shellac bond

C : Rubber bond

D : Resinoid bond

83 : What type abrasive wheel is used for grinding cemented carbides? *

2 points

A : Green silicon carbide

B : Grey aluminium oxide

C : White aluminium oxide

D : Brown aluminium oxide

84 : What is the value of one vernier division of a vernier micrometer? *

2 points

A : 0.01 mm

B : 0.02 mm

C : 0.009 mm

D : 0.002 mm

85 : What is the name of part marked as X in telescopic gauge? *

2 points

A : Handle

B : Fixed leg

C : Plunger lock

D : Telescopic leg

86 : What is the method of removing broken stud? *

1 point

A : Ezy-out

B : Prick punch

C : Making drill hole

D : Using square taper punch

87 : Why grey cast iron widely used for machine tools? *

2 points

A : Rapid cooling

B : Reduce vibration

C : High tensile strength

D : Very difficult to machining

88 : What is the tap drill size for M20 x 15? *

2 points

A : 18.5

B : 20

C : 19

D : 17

89 : What is the drill hole size for 16 mm reamer? *

2 points

A : 15.75 mm

B : 15.50 mm

C : 14.65 mm

D : 16 mm

90 : What is the name of the part marked as X? *

2 points

A : Breast plate

B : Bevel pinion

C : Frame work

D : Locking screw

91 : What is the size of drilled hole for reaming,ø 10 mm? *

2 points

A : 8.5 mm

B : 9.75 mm

C : 10.00 mm

D : 10.25 mm

92 : What is the name of part marked as X in hand reamer? *

2 points

A : Taper lead

B : Bevel lead

C : Circular lead

D : Taper lead angle

93 : Why drilled holes are over size than drill dia? | *

2 points

A : Feed ratio is more

B : Cooling is in effective

C : Insufficient clearance angle

D : Unequal length of cutting edge

94 : What is the counter sink angle of chamfering in the end of drilled hole for threading? *

2 points

A : 75°

B : 80°

C : 90°

D : 120°

95 : What is the name of thread? *

1 point

A : Vee thread

B : Buttress thread

C : Square thread

D : Saw - tooth thread

96 : What is the name of part marked X? *

2 points

A : Root

B : Pitch

C : Crest

D : Helix angle

97 : Why centre screw is provided in the die stock? *

2 points

A : To tighten the die

B : To adjust the depth of cut

C : To adjust the dia of internal thread

D : To adjust the dia of external thread

98 : What is the included angle of metric V ' threads? *

2 points

A : 45°

B : 29°

C : 60°

D : 47½°

99 : What 46 represent in standard marking system of grinding wheel (32A46H8V)? *

2 points

A : Grade

B : Grain size

C : Type of bond

D : Type of abrasive

100 : What is the tool used in grinding operation? *

2 points

A : Honing tool

B : Abrasive stick

C : Diamond dressers

D : Star wheel dressers

101 : What is the colour of aluminium metal? *

2 points

A : Dull white

B : White

C : Bright white

D : Bluish grey colour

102 : What H denotes in the specifications of grinding wheel 32A46H8V? *

2 points

A : Grain size

B : Type of abrasive

C : Grade

D : Structure

103 : Why precision instruments are made of invar steel? *

2 points

A : Durability

B : Cheaper in cost

C : Surface finishing is fine

D : Least coefficient of expansion

104 : Calculate the reading of vernier micrometer? *

2 points

A : 9.923 mm

B : 9.963 mm

C : 9.563 mm

D : 9.763 mm

105 : Why lime stone serves as flux added to the ore in the blast furnace? *

2 points

A : To form molter slag

B : To supply the oxygen

C : To burn the carbon in coke

D : To increase the melting point of ore

106 : Which micrometer having provision of inter changeable anvils? *

2 points

A : Depth micrometer

B : Inside micrometer

C : Outside micrometer

D : Screw thread micrometer

107 : Which factor determine the selection of wire in screw thread micrometer? *

2 points

A : Thread angle

B : Type of thread and pitch

C : Root and crest

D : Major diameter

108 : What is measured with telescopic gauge? *

2 points

A : Depth

B : External dimension

C : Angular dimension

D : Size of holes, slots and recesses

109 : What is produced from blast furnace? *

2 points

A : Pig iron

B : Cast iron

C : Wrought iron

D : Malleable iron

110 : What is the minimum dimension can measure with telescopic gauge? *

2 points

A : 8.0 mm

B : 12.7 mm

C : 19.0 mm

D : 150 mm

111 : Which gauge is used to measure below 8 mm dimension? *

2 points

A : Telescopic gauge

B : Small hole gauge

C : Depth micrometer

D : Inside micrometer

112 : Which cast iron has the ability to minimize tool chatter in machine tools? *

2 points

A : Grey cast iron

B : White cast iron

C : Nodular cast iron

D : Malleable cast iron

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