Machine Design Mechanical Engineering Test Questions - Set 35

Practice Test: Question Set - 35

1. A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?
    (A) There are four rivets per pitch length, all in double shear
    (B) There are four rivets per pitch length, out of which two are in single shear and two are in double shear
    (C) There are five rivets per pitch length, all in double shear
    (D) There are five rivets per pitch length, out of which four are in double shear and one is in single shear

2. A chain drive transmits __________ power as compared to belt drive.
    (A) More
    (B) Less
    (C) Same
    (D) None of these

3. For maximum power, the velocity of the belt will be
    (A) (T/m)
    (B) (T/2m)
    (C) (T/3m)
    (D) None of these

4. The expression 0.175 - 0.841/T is the Lewis form factor for
    (A) 14½° composite and full depth involute system
    (B) 20° full depth involute system
    (C) 20° stub system
    (D) None of the above

5. The design of pin of a rocker arm of an I.C. engine is based on
    (A) Bearing failure
    (B) Shearing failure
    (C) Bending failure
    (D) All of these

6. According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as
    (A) M6
    (B) M8
    (C) M6 - 8d
    (D) M8 - 6d

7. A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be
    (A) (6V/ π)1/2
    (B) (6V/ π)1/3
    (C) (6V/ π)2
    (D) (6V/ π)3

8. In a transverse fillet welded joint, the size of weld is __________ the throat of weld.
    (A) 0.5 times
    (B) Equal to
    (C) 2 times
    (D) Double

9. The draw of cotter should not be more than
    (A) 3 mm
    (B) 6 mm
    (C) 8 mm
    (D) 12 mm

10. The temperature at which the new grains are formed in the metal is known as
    (A) Lower critical temperature
    (B) Upper critical temperature
    (C) Recrystallization temperature
    (D) None of these

11. The taper on key is given on
    (A) Bottom side only
    (B) Top side only
    (C) On both sides
    (D) Any side

12. When a belt drive is transmitting maximum power,
    (A) Effective tension is equal to centrifugal tension
    (B) Effective tension is half of centrifugal tension
    (C) Driving tension on slack side is equal to centrifugal tension
    (D) Driving tension on tight side is twice the centrifugal tension

13. The angle of twist of shaft is
    (A) Directly proportional to (shaft diameter)²
    (B) Inversely proportional to (shaft diameter)²
    (C) Directly proportional to (shaft diameter)⁴
    (D) Inversely proportional to (shaft diameter)⁴

14. A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is
    (A) 5 N-m
    (B) 7 N-m
    (C) 10 N-m
    (D) 15 N-m

15. The resultant axial load on a bolt depends upon
    (A) External load applied
    (B) Initial tension due to tightening of the bolt
    (C) Relative elastic yielding of the bolt and the connected members
    (D) All of the above

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