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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

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

Q3 | A weir, generally, used as a spillway of a dam is

- narrow crested weir
- broad crested weir
- Ogee weir
- submerged weir

Q4 | The ratio of the inertia force to the

- pressure force
- elastic force
- surface tension force
- viscous force

Q5 | One litre of water occupies a volume of

- 100 cm3
- 250 cm3
- 500 cm3
- 1000 cm3

Q6 | The density of air is same at different heights.

- Correct
- 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

Q8 | The centre of pressure acts

- at
- above
- below

Q9 | The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.

- TRUE
- 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

Q11 | In the manufacturing of lead shots, the property of surface tension is utilised.

- Agree
- Disagree

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

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

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

Q15 | The body will float if the force of buoyancy is

- equal to
- less than
- more than

Q16 | All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.

- Correct
- Incorrect

Q17 | When the venturimeter is inclined, then for a given flow it will show

- same
- more
- less

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

Q19 | When the Mach number is equal to unity, the flow is called sonic flow.

- TRUE
- FALSE

Q20 | A submerged body is said to be in a stable equilibrium, if its centre of gravity

- coincides with
- lies below
- lies above

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

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

Q23 | The volume per unit mass of a liquid is called specific volume.

- Yes
- No

Q24 | The flow at critical depth in an open channel is called torrential flow.

- Yes
- No

Q25 | The reciprocal of Euler's number is called Newton number.

- Yes
- No