Q1. Three different weights fall from a certain height under vacuum. They will take
(A)  same time to reach earth
(B)  times proportional to weight to reach earth
(C)  times inversely proportional to weight to reach earth
(D)  unpredictable

Q2. In cross or regular lay ropes
(A)  direction of twist of wires in strands is opposite to the direction of twist of strands
(B)  direction of twist of wires and strands are same
(C)  wires in two adjacent strands are twisted in opposite direction
(D)  wires are not twisted

Q3. In standard taper roller bearings, the angle of taper of outer raceway is
(A) 15°
(B) 18°
(C) 15°
(D) 25°

Q4. In composite or reverse laid ropes
(A)  direction of twist of wires in strands is opposite to the direction of twist of strands
(B)  direction of twist of wires and strands are same
(C)  wires in two adjacent strands are twisted in opposite direction
(D)  wires are not twisted

Q5. Whether any core is required in wire ropes
(A) yes
(B) no
(C) sometimes
(D) rarely

Q6. If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to
(A)  diameter of bolt
(B)  0.75 x diameter of bolt
(C)  1.35 x diameter of bolt
(D)  2.5 x diameter of bolt

Q7. Basic shaft is one
(A)  whose upper deviation is zero
(B)  whose lower deviation is zero
(C)  whose lower as well as upper deviations are zero
(D)  does not exist

Q8. Basic hole is one
(A)  whose upper deviation is zero
(B)  whose lower deviation is zero
(C)  whose lower as well as upper deviations are zero
(D)  does not exist

Q9. I.S. specifies following total number of grades of tolerances
(A) 18
(B) 16
(C) 20
(D) 24

Q10. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately
(A) 0.4 times
(B) 0.6 times
(C) 0.7 times
(D) 0.8 times

Q11. Allen bolts are
(A)  self locking bolts
(C)  used in aircraft application
(D)  provided with hexagonal depression in head

Q12. The resultant axial load on a bolt depends on
(A)  initial tension
(C)  relative elastic yielding (springness) of the bolt and the connected member
(D) All of these

Q13. The connecting rod bolts are tightened up so that tightening stress
(A)  is just sufficient to hold parts together
(B)  approaches yield point
(C)  is 50% of yield point
(D)  is about yield point divided by safety factor

Q14. The connecting rod bolts are tightened up with initial tension greater than the external load so that
(A)  joint may not open up
(B)  bolts are weakest elements
(C)  the resultant load on the bolt would not be affected by the external cyclic load
(D)  bolts will not loosen during service

Q15. If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited
(A) square
(B) acme
(C) buttress
(D) BSW

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