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

Equal to
Larger than
None of these
Smaller than

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

There are five rivets per pitch length, all in double shear
There are five rivets per pitch length, out of which four are in double shear and one is in single shear
There are four rivets per pitch length, all in double shear
There are four rivets per pitch length, out of which two are in single shear and two are in double shear

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Plastic flow in ductile materials

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

ANSWER DOWNLOAD EXAMIANS APP