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MCQs

Total Questions : 3218 | Page 1 of 322 pages
Question 1. Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.
  1.    Thermal conductivity
  2.    Electrical conductivity
  3.    Specific gravity
  4.    Electrical resistivity
 Discuss Question
Answer: Option B. -> Electrical conductivity
Question 2. For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).
  1.    V/Vmax = (x/r)1/7
  2.    V/Vmax = (r/x)1/7
  3.    V/Vmax = (x.r)1/7
  4.    None of these
 Discuss Question
Answer: Option A. -> V/Vmax = (x/r)1/7
Question 3. What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.
  1.    4πg/3
  2.    0.01πgH/4
  3.    0.01πgH/8
  4.    0.04πgH/3
 Discuss Question
Answer: Option A. -> 4πg/3
Question 4. Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)
  1.    D
  2.    1/d
  3.    Σ
  4.    L/σ
 Discuss Question
Answer: Option C. -> Σ
Question 5. With increase in molecular weight of the gas, the head developed by a centrifugal compressor will
  1.    Decrease
  2.    Increase
  3.    Remain same
  4.    Unpredictable
 Discuss Question
Answer: Option A. -> Decrease
Question 6. Priming of a centrifugal pump is done to
  1.    Increase the mass flow rate of fluid
  2.    Develop effective pressure rise by the pump
  3.    Avoid chances of separation inside the impeller
  4.    None of these
 Discuss Question
Answer: Option C. -> Avoid chances of separation inside the impeller
Question 7. Pressure drop (Δp) for a fluid flowing in turbulent flow through a pipe is a function of velocity (V) as
  1.    V1.8
  2.    V-0.2
  3.    V2.7
  4.    V2
 Discuss Question
Answer: Option D. -> V2
Question 8. __________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm².
  1.    Centrifugal
  2.    Piston
  3.    Plunger
  4.    Vane
 Discuss Question
Answer: Option C. -> Plunger
Question 9. The terminal velocity of a small sphere settling in a viscous fluid varies as the
  1.    First power of its dimeter
  2.    Inverse of the fluid viscosity
  3.    Inverse square of the diameter
  4.    Square of the difference in specific weights of solid & fluid
 Discuss Question
Answer: Option B. -> Inverse of the fluid viscosity
Question 10. Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.
  1.    Less than
  2.    More than
  3.    Same as
  4.    None of these
 Discuss Question
Answer: Option B. -> More than

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