The included angle of American National threads is
A.29?
B.47
C.50?
D.55?
E.60?
Category: Machine Design Mcqs
Gears for wrist watches are generally manufactured by
A.Pitcl, angle
B.Lead angle
C.Helix angle
D.Axial pitch angle
E.Pressure angle
Rankine formula is valid upto slenderness ratio of
A.60
B.80
C.100
D.120
E.150
A self-socking screw is one which
A.Has locking arrangement
B.Has a hole drilled through for inserting locking pin
C.Has coefficient of friction equal to or greater than the tangent of the load angle
D.Has fine pitch screw threads
E.None of the above
The notch angle of Izod impact test specimen is
A.10?
B.20?
C.22
D.30?
E.45?
Iniversal coupling is
A.Used for collinear shafts
B.Rigid coupling
C.Type of flange coupling
D.Used for non-collinear shafts
E.None of the above
Oldham’s coupling is used to cannect two shafts which
A.Have lateral misalignment
B.Have two axes intersecting
C.Have lateral movement during power transmission
D.Changes axes during power transmission
E.Are not in exact alignment
A muff type coupling
A.Is a simple type rigid coupling
B.Is a simple type of flexible coupling
C.Is used for coplanar shafts
D.Is used for non-coplanar shafts
E.Non of the above
When a nut is tightened by placing a washer below it, the bolt will be subjected to
A.Compression
B.Tension
C.Shear
D.BI-axial stress
E.Torque
