The ‘crowning’ of flat pulleys is generally done
A.To rduce the belt friction
B.To prevent belt joint from damaging the belt surface
C.To prevent the belt from running off the pulley
D.In case of cross belt drives only
E.None of the above
Category: Machine Design Mcqs
Machines screws are
A.Screws with rounded head
B.Screws with button-head
C.Provided with slotted head and used with a nut
D.Headless
E.Generally provided with head longer than that of a normal screw
When the bolt is subjected to shock loading the resilience of the bolt should be considered in order to prevent breakege at
A.Head
B.Shank
C.Transition between head and shank
D.Threaded portion
E.Anywhere
V-belt sections generally used in an automobiles are
A.A and B
B.C
C.D
D.E
E.Any one of the above
The average values of modulus of rigidity for aluminium brass, copper and steel in descending order is
A.Aluminium, brass, copper, nickel and steel
B.Aluminium, copper, brass, nickel and steel
C.Aluminium, nickel, brass, copper and steel
D.Aluminium, brass, nickel, copper and steel
E.Aluminium, copper, nickel, brass and steel
When large quantities of bolts are to be purchased the quantity is usually specified in terms of
A.Number
B.Volume
C.Packets
D.Weight
E.None of the above
The diameter of rivets for 20 mm thick plates would be
A.10 mm
B.15 mm
C.20 mm
D.30 mm
E.40 mm
Rivets are
A.Heated before inserting in position
B.Heated after inserting in position
C.Not heated at all
D.Cold forged
E.None of the above
An automobile gear box has
A.Simple gear train
B.Compound gear train
C.Epicycle gear train
D.Compound epicyclic gear train
E.None of the above
