Related Questions

While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
A both ends fixed
B both ends hinged
C one end fixed and other end hinged
D one end fixed and other end free.
The lead screw of a lathe has _________ threads.
A Single start
B Double start
C Multi-start
D Any one of these
A lead-screw with half nuts in a lathe, free to rotate in both directions has
A V-threads
B Whitworth threads
C Buttress threads
D Acme threads
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)
A 0.5 d
B 0.75 d
C d
D 1.25 d
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 × diameter of bolt
C 1.25 × diameter of bolt
D 1.5 × diameter of bolt
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
The pitch of threads on a Jock nut in comparison to pitch of nut is
A Same
B Coarser
C Finer
D Very fine
In a center lathe, the cutting tool is fed in _________ with reference to the lathe axis.
A Cross direction only
B Longitudinal direction only
C Both cross and longitudinal direction
D Any direction
A feed gear box for a screw cutting lathe is designed on the basis of
A Geometric progression
B Arithmetic progression
C Harmonic progression
D None of these
A screw is said to be over hauling screw, if its efficiency is
A less than 50%
B more than 50%
C equal to 50%
D none of the mentioned

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