Hydraulics And Fluid Mechanics Set 20

Civil Engineering

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This set of Hydraulics and Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Hydraulics And Fluid Mechanics Set 20

Q1 | Gauge pressure at a point is equal to the absolute pressure
  • plus
  • minus
Answer: minus
Q2 | A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance
  • H / 3
  • H / 2
  • 2H / 3
  • 3H / 4
Answer: 2H / 3
Q3 | A weir, generally, used as a spillway of a dam is
  • narrow crested weir
  • broad crested weir
  • Ogee weir
  • submerged weir
Answer: Ogee weir
Q4 | The ratio of the inertia force to the
  • pressure force
  • elastic force
  • surface tension force
  • viscous force
Answer: pressure force
Q5 | One litre of water occupies a volume of
  • 100 cm3
  • 250 cm3
  • 500 cm3
  • 1000 cm3
Answer: 1000 cm3
Q6 | The density of air is same at different heights.
  • Correct
  • Incorrect
Answer: Incorrect
Q7 | The maximum discharge over a broad crested weir is
  • 0.384 Cd x L x H1/2
  • 0.384 Cd x L x H3/2
  • 1.71 Cd x L x H1/2
  • 1.71 Cd x L x H3/2
Answer: 1.71 Cd x L x H3/2
Q8 | The centre of pressure acts
  • at
  • above
  • below
Answer: below
Q9 | The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.
  • TRUE
  • FALSE
Answer: FALSE
Q10 | When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the
  • sum
  • difference
  • arithmatic mean
  • geometric mean
Answer: difference
Q11 | In the manufacturing of lead shots, the property of surface tension is utilised.
  • Agree
  • Disagree
Answer: Agree
Q12 | If a body floating in a liquid does not return back to its original position, and heels farther away when given a small angular displacement, the body is said to be in neutral equilibrium.
  • Yes
  • No
Answer: No
Q13 | The total pressure on the bottom of a closed cylindrical vessel completely filled up with a liquid is the sum of the total centrifugal pressure and the weight of the liquid in the vessel
  • Correct
  • Incorrect
Answer: Correct
Q14 | A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.
  • Agree
  • Disagree
Answer: Agree
Q15 | The body will float if the force of buoyancy is
  • equal to
  • less than
  • more than
Answer: more than
Q16 | All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
  • Correct
  • Incorrect
Answer: Correct
Q17 | When the venturimeter is inclined, then for a given flow it will show
  • same
  • more
  • less
Answer: same
Q18 | With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
  • decrease
  • increase
  • remain unchanged
  • depend upon the characteristics of liquid
Answer: decrease
Q19 | When the Mach number is equal to unity, the flow is called sonic flow.
  • TRUE
  • FALSE
Answer: TRUE
Q20 | A submerged body is said to be in a stable equilibrium, if its centre of gravity
  • coincides with
  • lies below
  • lies above
Answer: lies below
Q21 | If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.
  • TRUE
  • FALSE
Answer: FALSE
Q22 | The weight per unit volume of a liquid at a standard temperature and pressure is called
  • specific weight
  • mass density
  • specific gravity
  • none of these
Answer: specific weight
Q23 | The volume per unit mass of a liquid is called specific volume.
  • Yes
  • No
Answer: Yes
Q24 | The flow at critical depth in an open channel is called torrential flow.
  • Yes
  • No
Answer: No
Q25 | The reciprocal of Euler's number is called Newton number.
  • Yes
  • No
Answer: Yes
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