Question
Informatics Practices Question on Efficiency of Screws
Choose the incorrect statement in case of plain washer:
A
It is placed below nut to give flat smooth bearing surface.
B
It is used where surface of machine part is rough.
C
It prevents nut from cutting in to the metal.
D
It usually loosens the joint of bolt and nut.
Answer
It usually loosens the joint of bolt and nut.
Explanation
Solution
The correct option is (D): It usually loosens the joint of bolt and nut.