Download Aptitude Crack
img not found img not found

UPSC Civil Service Exam Questions

Q1:

Two reservoirs at different surface elevations are connected by a set of two pipes A and B of same diameter and length in parallel. If the friction factor of A is 4 times that of the pipe B, what is the ratio of the discharge in A to that in B ?

A 0.25

B 4.0

C 2.0

D 0.5

ANS:C - 2.0

@Santu ans is 2 not 0.5.

f2/f1=1/2.
Q=A/V.
Q1/Q2=4 (v1/v2)^2.
Then elaborate Q1/Q2.

I.e (A1*v1)/(A2/v2)=4 (v1/V2)^then cancel v1/v2 on both sites.
We get,
Then A1/A2=4 [v1/v2].
Hence v1/v2=root of f2/f1 = 1/2.
So, the ans is A1/A2 = 4 * (1/2).
We get the ans 2. So answer c is correct.



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.