Engineering > Mechanical Engineering

HYDRAULICS AND FLUID MECHANICS MCQs

Total Questions : 665

Page 1 of 34 pages
Question 1. The tangential velocity of the water element having a free vortex is
  1.     Directly proportional to its distance from the centre
  2.     Inversely proportional to its distance from the centre
  3.     Directly proportional to its (distance)2 from the centre
  4.     Inversely proportional to its (distance)2 from the centre
Answer: Option B
Question 2. The mass of 2.5 m3 of a certain liquid is 2 tonnes. its mass density is
  1.     200 kg/m3
  2.     400 kg/m3
  3.     600 kg/m3
  4.     800 kg/m3
Answer: Option D
Question 3. If v1 and v2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is
  1.     (V1 - V2) / V1
  2.     (V1² - V2²) / V1²
  3.     V1 / (V1 - V2)
  4.     V1² / (V1² - V2²)
Answer: Option B
Question 4. If ‘w’ is the specific weight of liquid and ‘k’ the depth of any point from the surface, then pressure intensity at that point will be
  1.     h
  2.     wh
  3.     w/h
  4.     h/w
Answer: Option B
Question 5. If ‘w’ is the specific weight of liquid and ‘k’ the depth of any point from the surface, then pressure intensity at that point will be
  1.     h
  2.     wh
  3.     w/h
  4.     h/w
Answer: Option B
Question 6. The mass of 2.5 m3 of a certain liquid is 2 tonnes. its mass density is
  1.     200 kg/m3
  2.     400 kg/m3
  3.     600 kg/m3
  4.     800 kg/m3
Answer: Option D
Question 7. The mass of 2.5 m3 of a certain liquid is 2 tonnes. its mass density is
  1.     200 kg/m3
  2.     400 kg/m3
  3.     600 kg/m3
  4.     800 kg/m3
Answer: Option D
Question 8. The mass of 2.5 m3 of a certain liquid is 2 tonnes. its mass density is
  1.     200 kg/m3
  2.     400 kg/m3
  3.     600 kg/m3
  4.     800 kg/m3
Answer: Option D
Question 9. If ‘w’ is the specific weight of liquid and ‘k’ the depth of any point from the surface, then pressure intensity at that point will be
  1.     h
  2.     wh
  3.     w/h
  4.     h/w
Answer: Option B
Question 10. If ‘w’ is the specific weight of liquid and ‘k’ the depth of any point from the surface, then pressure intensity at that point will be
  1.     h
  2.     wh
  3.     w/h
  4.     h/w
Answer: Option B
Question 11. The power produced by the reaction turbine is ________ to the head of water.
  1.     Directly proportional
  2.     Inversely proportional
  3.     4th power
  4.     None of these
Answer: Option A
Question 12. When the flow in an open channel is gradually varied, the flow is said to be
  1.    Steady uniform flow
  2.    Steady non-uniform flow
  3.    Unsteady uniform flow
  4.    Unsteady non-uniform flow
Answer: Option B
Question 13. When the flow parameters at any given instant remain same at every point, then flow is said to be
  1.    Quasi-static
  2.    Steady state
  3.    Laminar
  4.    Uniform
Answer: Option D
Question 14. The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by
  1.    2V/(vr - v)
  2.    2V/(vr + v)
  3.    V/(vr - v)
  4.    V/(vr + v)
Answer: Option B
Question 15. The atmospheric pressure with rise in altitude decreases
  1.    Linearly
  2.    First slowly and then steeply
  3.    First steeply and then gradually
  4.    Unpredictable
Answer: Option B
Question 16. An ideal flow of any fluid must satisfy
  1.    Pascal law
  2.    Newton's law of viscosity
  3.    Boundary layer theory
  4.    Continuity equation
Answer: Option D
Question 17. The bulk modulus of elasticity
  1.    Has the dimensions of 1/pressure
  2.    Increases with pressure
  3.    Is large when fluid is more compressible
  4.    Is independent of pressure and viscosity
Answer: Option B
Question 18. Gradually varied flow is
  1.    Steady uniform
  2.    Non-steady non-uniform
  3.    Non-steady uniform
  4.    Steady non-uniform
Answer: Option D
Question 19. Which of the following pump is generally used to pump highly viscous fluid?
  1.    Centrifugal pump
  2.    Reciprocating pump
  3.    Air lift pump
  4.    Screw pump
Answer: Option D
Question 20. A hydraulic accumulator is a device used to store _________ energy which may be supplied to a machine later on.
  1.    Strain
  2.    Pressure
  3.    Kinetic
  4.    None of these
Answer: Option B