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Engineering :: Machine Design

11.  A fine series screws of major diameter 8 mm and pitch 1 mm is generally designated as
A. 8 M B. 8 x M 1
C. 8 x 1 M D. 8 M 1
E. M 8 x 1    
12.  The pitch of threads on a lock-nut is
A. Fine B. Very fine
C. Coarse D. Same as that of nut
E. None of the above    
13.  Allen bolts are
A. Self locking bolts B. Self-screwing bolts
C. Used on aircraft D. Provided with hexagonal depression in head
E. Counter sunk    
14.  A stud is
A. Screw with long threads B. Screw with circular heads
C. Screw with cylindrical head D. Headless scew
E. Oval heads screw    
15.  An eye bolt is generally provided on
A. Machine tools B. Automobiles
C. Cranes D. Furnaces
E. Electric motors    
16.  If the threads on a bolt are right hand the threads on nut will be
A. Right hand B. Right hand withmore clerance
C. Right hand with less clearance D. Left hand
E. Left hand with more clearance    
17.  Screw parts with a right hand thread must only be stressed
A. In the direction of screwing in B. In the direction of screwing out
C. In the direction normal to the screw axis D. In the plane of principal axis
E. In the shear plane    
18.  A bench vice is provided with
A. Vee threads B. BSW threads
C. Buttress threads D. Acme threads
E. None of the above    
19.  Ball bearing type screws are generally used
A. In bench vices B. In screw jacks
C. In earthmoving machinery D. Steering mechanisms
E. None of the above    
20.  Maximum principal stress theory is applicable for
A. Elastic materials B. Plastic materials
C. Ductile materials D. Brittle materials
E. None of the above    

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