Machine Design
A hot short metal is

Brittle under all conditions
Brittle when hot
Ductile at high temperature
Brittle when cold

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Machine screws are

Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut
Used to prevent relative motion between two parts
Similar to stud

ANSWER DOWNLOAD EXAMIANS APP