Machine Design MCQ Questions Answers Mechanical Engineering

11) Select the odd one out

a) feather key

b) saddle key

c) woodruff key

d) gib head key

View Answer
Option -b)

12)In Vicker’s hardness testing, the pyramid indentor apex is

(a) 40°

(b) 122°

(c) 136°

(d) 152°

(e) 161°.

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Option – c)

13) The standard taper provided in taper key is

a) 1 : 20

b) 1 : 140

c) 1 : 100

d) 1 : 80

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Option – c)

14) Which of the following key have self aligning property

a) Barth key

b) Kennedy key

c) Lewis key

d) Woodruff key

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Option – a)

15) Which material is used for bushes in the bushed pin type of flexible coupling

a) Gun metal

b) Plastic

c) Rubber

d) Aluminium

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Option – c)

16) A sleeve or muff coupling is designed as

a) solid shaft

b) hollow shaft

c) thick cylinder

d) strut

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Option – b)

17) The crest diameter of a screw thread is same as

a) core diameter

b) root diameter

c) major diameter

d) minor diameter

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Option – c)

18) If P is the pitch of a square thread, then the depth of thread d is given by

a) 0.5 P

b) P

c) 1.5 P

d) 2 P

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Option – a)

19) The maximum efficiency of self locking screw is

a) 50%

b) 70%

c) 75%

d) 80%

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Option – a)

20) According to IBR, the thickness of boiler shell is not to be less than

a) 5 mm

b) 7 mm

c) 10 mm

d) 12 mm

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Option – b)

21) Which of the following is not a desirable material for rivets ?

a) mild steel

b) cast iron

c) aluminium

d) copper

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Option – b)

22) The diameter of a rivet will be if plate thickness is 8 mm

a) 5.66 mm

b) 11.3 mm

c) 16.9 mm

d) 22.6 mm

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Option – c)

23) In a fillet welded joint, the weakest area of weld is

a) Toe

b) Root

c) Throat

d) Face

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Option – c)

24) Which of the following is not a friction clutch ?

a) plate clutch

b) jaw clutch

c) cone clutch

d) centrifugal clutch

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Option – b)

25) The ratio of inner to outer radii of a clutch is normally taken between

a) 0.3 – 0.4

b) 0.4 – 0.4

c) 0.5 – 0.6

d) 0.6 – 0.7

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Option – d)

26) The type of chain used in motor cycle is

a) Bush roller

b) Silent

c) Pintle

d) Ewast

View Answer
Option – a)

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