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MCQs

Total Questions : 1709 | Page 1 of 171 pages
Question 1. Cavitation is caused by
  1.    high velocity
  2.    high pressure
  3.    weak material
  4.    low pressure
 Discuss Question
Answer: Option D. -> low pressure
Question 2. For laminar flow in circular pipes, the Darcy’s friction factor f is equal to
  1.    16/Re
  2.    32/ Re
  3.    64/ Re
  4.    none of the above where Re is Reynolds number.
 Discuss Question
Answer: Option C. -> 64/ Re
Question 3. Property of a fluid by which its own molecules are attracted is called
  1.    adhesion
  2.    cohesion
  3.    viscosity
  4.    compressibility
 Discuss Question
Answer: Option B. -> cohesion
Question 4. The property of a fluid which enables it to resist tensile stress is known as
  1.    compressibility
  2.    surface tension
  3.    cohesion
  4.    adhesion
 Discuss Question
Answer: Option C. -> cohesion
Question 5. The eddy viscosity for turbulent flow is
  1.    a function of temperature only
  2.    a physical property of the fluid.
  3.    dependent on the flow
  4.    independent of the flow
 Discuss Question
Answer: Option C. -> dependent on the flow
Question 6. For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is
  1.    constant
  2.    dependent only on Reynolds number
  3.    a function of Reynolds number and relative roughness
  4.    dependent on relative roughness only
 Discuss Question
Answer: Option B. -> dependent only on Reynolds number
Question 7. Two pipe systems can be said to be equivalent, when the following quantites are same
  1.    friction loss and flow
  2.    length and diameter
  3.    flow and length
  4.    friction factor and diameter
 Discuss Question
Answer: Option A. -> friction loss and flow
Question 8. For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal
  1.    ratio of inertial force to force due to viscosity
  2.    ratio of inertial force to force due to gravitation
  3.    ratio of inertial force to force due to surface tension
  4.    all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity
 Discuss Question
Answer: Option D. -> all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity
Question 9. A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc
  1.    10 kg
  2.    100 kg
  3.    1000 kg
  4.    1 kg
 Discuss Question
Answer: Option A. -> 10 kg
Question 10. Specific weight of water in S.I. units is equal to
  1.    1000 N/m3
  2.    10000 N/m3
  3.    9.81 xlO3 N/m3
  4.    9.81 xlO6 N/m3
 Discuss Question
Answer: Option C. -> 9.81 xlO3 N/m3

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