A. Increase
B. Decrease
C. Not change
D. Exponentially decrease
Related Mcqs:
- The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost is P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet ?
A. P, Q and R
B. P and R
C. R and S
D. P, Rand S - Applying a pressure drop across a capillary results in a volumetric flow rate ‘Q’ under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is____________________?
A. Q/2
B. Q/4
C. Q/8
D. Q/16 - For very low pressure and high discharge rate, the compressor used is a/an ______________ compressor?
A. Axial
B. Reciprocating
C. Rotary
D. None of these - For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of_________________?
A. 2
B. 2
D. 1/2 - In a fully turbulent flow (Re > 105) in a pipe of diameter ‘d’, for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is_______________?
A. d
B. d2
C. d2.5
D. d4 - With increase in molecular weight of the gas, the head developed by a centrifugal compressor will________________?
A. Decrease
B. Increase
C. Remain same
D. Unpredictable - A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a ____________ pump?
A. Sump
B. Volute
C. Vacuum
D. Submerged - For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to____________________?
A. R
B. R2
C. R4
D. R0.5 - Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about__________________?
A. 0.42
B. 0.62
C. 0.82
D. 0.98 - A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the new discharge will be __________ litres/minute ?
A. 500
B. 200
C. 1000
D. 750
