Chemical Engineering MCQs

6108 MCQs (Page 436 of 611)

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Permanent pressure loss in a well designed Venturimeter is about _____________ percent of the venturi differential?

A. 1
B. 10
C. 30
D. 50

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The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is___________________?

A. √(hw/π)
B. Hw/2 (h + w)2
C. Hw/4 (h + w)2
D. 2hw/(h + w)

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When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an______________________?

A. Ejector
B. Blower
C. Injector
D. Airlift

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Buckingham-π theorem states that in any physical problem including ‘n’ quantities having ‘m’ dimensions, the quantities can be arranged into _____________ independent dimensionless parameters?

A. M
B. N
C. N-m
D. N/m

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A globe valve is the most suitable for applications, in which____________________?

A. Fluid flow control is required
B. Fluid contains dispersed solid particles
C. Valve is required to be either fully open or fully closed
D. One way flow is required

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Which of the following is an undesirable characteristic of a refrigerant ?

A. It should be non-explosive
B. It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
C. Its vapor pressure at the condenser temperature should be very high
D. None of these

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Sound waves propagation in air exemplifies an ______________ process?

A. Adiabatic
B. Isothermal
C. Isometric
D. None of these

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Work done may be calculated by the expression ∫ p dA for _____________ processes ?

A. Non-flow reversible
B. Adiabatic
C. Both a. and b
D. Neither a. nor b

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1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be ?

A. 35 k
B. 174 k
C. 274 k
D. 154 k

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In the reaction; N2 + O2 ⇌ 2NO, increasing the pressure will result in_________________?

A. Shifting the equilibrium towards right
B. Shifting the equilibrium towards left
C. No change in equilibrium condition
D. None of these

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