Machine Design
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.

Smaller than
Larger than
Equal to
None of these

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
According to I.B.R., when the thickness of the boiler shell (t) is less than 8 mm, then the diameter of the rivet hole (d) is obtained by

Equating tearing resistance of the plate to the shearing resistance of the rivets
Equating shearing resistance to the crushing resistance of the rivets
None of these
Equating tearing resistance of the plate to the crushing resistance of the rivets

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Plastic flow in ductile materials

Depends on other considerations
Increases the seriousness of static loading stress concentration
Lessens the seriousness of static loading stress concentration
Has no effect on it

ANSWER DOWNLOAD EXAMIANS APP