FLUID MECHANICS AND MACHINERY
1.The inlet length of a Venturimeter is
(a) equal to the outlet length
(b)more than outlet length
(c)less than outlet length
(d)none of the above
Answer:(b)
2.Chezy’s formula is given by
(a) V=i√mc
(b)V=m√ci
(c)V=c√mi
(d)none of these
Answer:(c)
3.Pitote tube is used to measure
(a) velocity at a point
(b) Discharge
(c) pressure at a point
(d)none of these
Answer:(a)
4.Atmospheric pressure head in terms of water column is
(a)8.33m
(b)9.81m
(c)10.30m
(d)7.8m
Answer:(c)
5.Discharge in an open channel can be measured with
(a)orifice
(b) notches
(c) Venturimeter
(d) Elbow meter
Answer:(b)
6.A pressure reading below the atmospheric pressure is known as
(a) Gauge pressure
(b)Vaccum pressure
(c) Absolute pressure
(d)Static pressure
Answer:(b)
7.The centroid of the displaced fluid volume is called
(a) Centre of buoyancy
(b)Metacentre
(C) Centre of gravity
(d)Centre of pressure
Answer:(a)
8.A ship is seen to enter sea from a river.Its depth of submergence will.
(a) Increase
(b) Decrease
(c) Remains at the same level
(d) Depends on the material of the ship
Answer:(b)
9.1kg force is equal to
(a)1KN
(b)9810N
(c)9.81N
(d)981N
Answer: (c)
10.The unit of strain is
(a)mm
(b)Kg.cm
(c)N/mm²
(d) No unit
Answer:(d)
11.The force per unit area
(a) Joule
(b) Energy
(c) Velocity
(d) Pressure
Answer:(d)
12.The resultant upward thrust experienced by a body when immersed in the fluid
(a) density of fluid
(b) viscosity
(c) Centre of floatation
(d)Buoyancy
Answer: (d)
13.The energy possed by a body due to change in its position
(a) potential energy
(b) Kinetic energy
(c) Mechanical energy
(d) Absolute energy
Answer:(b)
14.The quantity of fluid flowing per unit time is constant
(a) Uniform flow
(b) Steady flow
(c)Laminar
(d) Unsteady
Answer:(b)
15.The ratio of density of a substance to the density of water
(a) Relative gravity
(b) Specific gravity
(c) Weight of substance
(d) Specific weight
Answer:(b)
16.Unit of heat is
(a) Calorie
(b)kg
(c)Degree
(d) Newton
Answer:(a)
17.The increase in metacentric height
(a) Increase stability
(b) Decrease stability
(c) Increase comfort for passengers
(d)All of these
Answer:(a)
18.Specific gravity of aluminium is
(a)10.9
(b)1.0
(c)10.0
(d)2.7
Answer:(d)
19.Force is a quantity of
(a) Vector
(b)Scalar and Vector
(c)Scalar
(d)None of the above
Answer:(a)
20.One Newton is equal to
(a)10⁴dynes
(b)10⁵dynes
(c)10⁶dynes
(d)10⁷dynes
Answer:(b)
21. One HP how many Kilo Watts
(a)745.7
(b)7457
(c)0.7457
(d)74.57
Answer:(c)
22.what is measured using a Venturimeter?
(a) Velocity
(b) pressure
(c) Viscosity
(d) Discharge
Answer:(d)
23.What is the disadvantage of centrifugal pump compared to reciprocal pump
(a) Priming required
(b) Pulsatory flow
(c)Low speed
(d) Difficult to handle viscous fluid
Answer:(a)
24.The intensity of pressure at any point in a fluid at rest is the same in all direction is
(a) Bernoulli’s theorem
(b) Newton’s law
(c) Pascal’s law
(d) Archimedes principle
Answer:(c)
25.For a liquid variation in its volme
with the variation of pressure is known as
(a) Viscosity
(b)mass density
(c) Compressibility
(d) liquid pressure
Answer:(c)
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