A. Evaporation
B. Cavitation
C. Sublimation
D. Stripping
Related Mcqs:
- Pumping of a corrosive liquid is generally preferred to be done by a ______________ pump, as it can be made of a variety of materials including plastics?
A. Piston
B. Gear
C. Positive displacement
D. Sump - Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the _______________ decreases?
A. NPSH required
B. BHP required by the pump
C. Head of the liquid pumped
D. All A., B. and C. - If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is_________________?
A. Same in both the tubes
B. Greater in 1 mm dia tube
C. Greater in 0.5 mm dia tube
D. Zero in both the tubes - Which of the following is the most common pump for pumping either raw sewage or sludge ?
A. Electromagnetic pump
B. Centrifugal pump
C. Reciprocating pump
D. Gear pump - Which of the following is used for pumping crude oil from oil well ?
A. Single stage centrifugal pump
B. Gear pump
C. Screw pump
D. Duplex/triplex reciprocating pump - 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 - Rise of liquid in a capillary tube is due to_________________?
A. Cohesion
B. Adhesion
C. Both A. & B.
D. Neither A. nor B. - A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is _____________ litres?
A. 600
B. 660
C. 1.1
D. 60 - Which of the following may be termed as a variable orifice flow-meter ?
A. Rotameter
B. Pitot tube
C. V-notch
D. All A., B. and C. - Vena-contracta formed during flow of a liquid through an orificemeter has__________________?
A. Minimum liquid cross-section
B. More diameter compared to orifice diameter
C. Minimum velocity of fluid stream
D. None of these
