Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 11 (Q.No. 16)
16.
If the diameter of a shaft subjected to torque alone, is doubled, then the horse power P can be increased to
Discussion:
2 comments Page 1 of 1.
Rahul verma said:
3 years ago
Shear stress = 16T/π*D^3.
So,
T IS PROPORTIONAL TO D^3.
POWER=2*pi*NT/60.
OVERALL.
POWER IS PROPORTIONAL TO T AND T IS PROPORTIONAL TO D^3.
So, POWER IS ALSO PROPORTIONAL TO D^3,
HERE.
D'=2D.
So,
P'=8P.
So,
T IS PROPORTIONAL TO D^3.
POWER=2*pi*NT/60.
OVERALL.
POWER IS PROPORTIONAL TO T AND T IS PROPORTIONAL TO D^3.
So, POWER IS ALSO PROPORTIONAL TO D^3,
HERE.
D'=2D.
So,
P'=8P.
(1)
Keyur patel said:
7 years ago
Power = Torque * Rotational Speed.
When diameter is double, then torque carrying capacity become 8 times the original, so power also increase 8 times.
When diameter is double, then torque carrying capacity become 8 times the original, so power also increase 8 times.
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