Food Engineering Questions and Answers – Unit Operations – Fluid Mechanics-2

This set of Food Engineering Questions & Answers for experienced focuses on “Fluid Mechanics-2”.

1. Statement 1: For rough control of flow _____ are used.
Statement 2: For fine control of flow _____ are used.
a) Needle valves, Globe valves
b) Needle valves, Gate valves
c) Globe valves, Needle valves
d) Gate valves, Globe valves
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2. Which of the following is untrue about non-return valves?
a) They’re also called foot valves as they’re present at the foot of centrifugal pumps to prevent priming
b) They prevent flow in the opposite direction even if the pressure increases in the opposite direction
c) All of the mentioned
d) None of the mentioned
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3. Statement 1: Generally needle valves are not used for liquids.
Statement 2: For a unidirectional flow, non return valves are used.
a) True, False
b) True, True
c) False, False
d) False, True
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4. Which of the following is true about Centrifugal pumps?
a) It’s suitable for corrosive and toxic fluids
b) It has a high pressure head
c) Priming is not needed
d) None of the mentioned
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5. Which of the following is true about Rotary pumps?
a) These consist of gear pumps which create high pressures
b) In internal gear pumps, a pinion gear is driven by a motor which is eccentric and the ring gear is co-axial and is driven by the pinion gear
c) In Spur gears, vacuum created allows liquid to flow from suction to delivery line
d) All of the mentioned
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6. Statement 1: Diaphragm pumps can handle corrosive material and do not have leakage problems, but, they only vibrate hence the output is low.
Statement 2: Diaphragm pump is an example of _____
a) True, negative displacement pump
b) True, positive displacement pump
c) False, negative displacement pump
d) False, positive displacement pump
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7. Statement 1: Fans and blowers create pressure energy whereas compressors don’t.
Statement 2: In food processing various liquids like milk and juices are transported by pumps
a) True, False
b) True, True
c) False, False
d) False, True
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8. Drain pipes are present to remove _____
a) Waste
b) Urea
c) Condensate
d) None of the mentioned
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9. In food industry, chlorine line is painted _____ and hydrogen line is painted _____
a) Yellow, black
b) Green, blue
c) Orange, red
d) Yellow, red
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10. _____ is a mechanical gadget used to prevent leaks.
a) Hydrogen fitting
b) Stuffing Box
c) Mechanical Box
d) None of the mentioned
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11. In a rota meter _________ force is directly proportional to _____ of the fluid.
a) Buoyancy, Linear Velocity
b) Gravitational, Volumetric flow rate
c) Gravitational, Linear Velocity
d) Buoyancy, Volumetric flow rate
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12. Which correction of the orifice meter is corrected in the venturimeter?
a) The eddies are not formed as the entrance to the downstream is not very big as compared to the vena contracta
b) The throat diameter can be changed
c) All of the mentioned
d) None of the mentioned
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Sanfoundry Global Education & Learning Series – Food Engineering.

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