### Hydraulics And Fluid Mechanics Set 20

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