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
(D) none of the above
Allen bolts are___________________?
(A) self locking bolts
(B) designed for shock load
(C) used in aircraft application
(D) provided with hexagonal depression in head
(D) uniform strength bolts
I.S. specifies following total number of grades of tolerances__________________?
(A) 18
(B) 16
(C) 20
(D) 22
(D) 14
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
(D) none of the above
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
(D) none of the above
Whether any core is required in wire ropes________________?
(A) yes
(B) no
(C) sometimes
(D) rarely
(D) very often
In standard taper roller bearings, the angle of taper of outer raceway is___________________?
(A) 5°
(B) 8°
(C) 15°
(D) 25°
(D) 40°.
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
(D) none of the above
In hydrostatic bearings ____________________?
(A) the Oil film pressure is generated only by the rotation of the journal
(B) the oil film is maintained by supplying oil under pressure
(C) do not require external supply of lubricant
(D) grease is used for lubrication
(D) none of the above
The rated life of a bearing varies___________________?
(A) directly as load
(B) inversely as square of load
(C) inversely as cube of load
(D) inversely as fourth power of load
(D) none of the above