In air friction damping – McqOptions

MCQOPTIONS

1.	In air friction damping
A.	the air pressure opposes the motion of piston when it is moving inwards
B.	the air pressure opposes the motion of piston when it is moving outwards
C.	the air pressure opposes the motion of piston both when it is moving inwards as well as outwards
D.	the air pressure may oppose or aid the motion of piston depending on the design
Answer» D. the air pressure may oppose or aid the motion of piston depending on the design

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