11.
The length of piston usually varies between:
(Where D is the diameter of piston tube)
Exam Year(s)
RSMSSB JE - 2025, RSMSSB - 2025,
Answer: A
The length of a piston usually lies between D and 1.5 D.
In IC engine design the total length of the piston is generally taken as about 1 to 1.5 times the cylinder bore. That gives enough skirt bearing area to carry the side thrust from the connecting rod without making the piston heavy.
Lengths of 1.5 D and above would add needless weight and inertia to a reciprocating part.
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