Paper for Entry Test Preparation
Physics 1st year Chapter No. 6
Total marks:- 160 Time
allowed 30 minutes
Note:- Fill
the appropriate answer of the following questions in the answer sheet. Double
filling and erasing is not allowed. Each question carries equal marks and for
each wrong answer minus one is awarded.
1) The property of fluids due to which they resist
their own flow is called:
a)
Drag force b)
Surface tension c)
Viscosity d)
Optical property
2) A body passing through a viscous medium is
affected by:
a)
One force only b) Two
forces c) Four
forces d) Three
forces
3) A body moving through a viscous medium eventually
comes to rest because of:
a)
Force of gravity b)
Force of friction c) Its
weight d) Both
(a) and (c)
4) Fluid friction is ___ the friction between two
solids surfaces:
a)
Greater than b)
Smaller than c)
Equal to d)
None of all
5) Viscosity of water is __ that of air but __ that
of plasma:
a)
More, more b)
Less, more c)
Less, less d)
More, less
6) Stroke’s law holds for:
a)
Motion through free space b)
Motion through viscous medium
c)
Bodies of all shape d)
Motion through metals
7) High speed meteors rushing through air reduces to
ashes because of:
a)
Force of gravity b) High
resistance of air c) Drag force d) High viscosity of
air
8) A massive object falls through a fluid:
a)
Faster b)
Slower c)
Slowest d)
Dose not move
9) Terminal velocity of the droplet through a medium
depends upon its:
a)
Surface tension b)
Viscosity c)
Drag force d)
Volatility
10) At high speeds, fluids friction __ and fuel
consumption___:
a)
Increases, decreases b)
Increases, Increases c)
Decreases, Increases d)
Decreases, decreases
11) Fog droplets are suspended in air when their
weight is balanced by:
a)
force of gravity b)
Upward thrust due to air c) Surface
tension d) Non of all
12) Drag force increases, if speed of the object
moving through the fluid:
a)
Increases b)
Decreases c)
Remains constant d) Non of
all
13) Stoke’s law is not applicable when the speed of
the object moving through a fluid is:
a)
Zero b)
Small c)
Large d)
Any speed
14) The drag force according to stoke’s law is:
a)
6 p2
h r v b) 6 p h r2 v c) 6 p
h r v d) 6 p h r v2
15) Study of fluids in motion basically involves law
of conservation of:
a)
Mass b)
Energy c)
Charge d)
Both (a) and (b)
16) The direction of the velocity of fluid at
certain point and direction of streamline are:
a)
Same b)
Different from each other c) Diverging d) Converging
17) The irregular or unsteady flow of the fluid is
called:
a)
Laminar flow b)
Turbulent flow c)
Streamline flow d) Both
(a) and (c)
18) The equation of continuity is defined as A1v1
= A2v2. Unit of A1v1 is:
a)
Cubic meter b)
Cubic meter per second c) Square
meter per second d) Non of all
19) Ration of mass to density gives:
a)
Volume b)
Pressure c)
Energy d)
(Volume)-1
20) Turbulent flow is:
a)
Unsteady and regular b) Steady
and irregular c) Unsteady and
irregular d) Steady and regular
21) According to Bernoulli’s theorem, when the speed
of fluid is high, there pressure will be:
a)
High b)
Low c) Either
high or low d) Non of all
22) Chimney works ___ when it is ____:
a)
Worst, tall b)
Best, tall c)
Beast, small d)
Worst, small
23) Bernoulli’s equation is the equation that
relates:
a)
Pressure, volume and temperature b)
Fluid speed, temperature and height
c)
Height, fluid speed and pressure d)
Non of all
24) The action of perfumes bottles depends upon:
a)
Bernoulli’s theorem b)
Equation of continuity c) Surface
tension d) Viscosity
25) The unit of rgh
in Bernoulli’s equation is of:
a)
Pressure b)
Volume c)
Work d)
Force
26) Fluid means:
a)
Solid b)
Liquid c)
Gas d)
Both (a) and (c)
27) Streamline flow is also called:
a)
Viscous flow b)
Laminar flow c)
Compressible flow d) All of
above
28) When the fluid is in motion, its flow may be:
a)
Streamline b)
Turbulent c)
Either (a) or (b) d) Non
of all
29) To understand behaviours of a fluid in motion,
we must suppose that fluid:
a)
Is non viscous b) Is
incompressible c) Motion is
steady d) All of above
30) While deriving Bernoulli’s equation, the law of
conservation of __ become the base fact:
a)
Mass b)
Energy c)
Charge d)
Ampere
31) If , A, v, t denote area, velocity and time,
then rate of flow will be given by the formula:
a)
Av b)
Avt c)
Av/t d)
vt/A
32) In the derivation of equation of continuity, the
law of conservation of __ becomes the base fact:
a)
Mass b)
Energy c)
Charge d)
All of them
33) The equation of fluid dynamics that relates
pressure, fluid speed and height, is called:
a)
Equation of continuity b)
Bernoulli’s equation c) Venturi
equation d) All of above
34) Torricelli’s equation is an application of:
a)
Bernoulli’s equation b) Equation
of continuity c) Venturi equation d) All of above
35) Normally, the blood pressure (torr unit) in a
healthy human body varies from:
a)
200 to 100 b)
150 to 70 c)
120 to 80 d)
100 to 60
36) Systolic pressure means ___ and diastolic
pressure means ___ blood pressure:
a)
High, low b)
Low, high c)
Low, low d)
High, high
37) Blood is __ fluid having a density ___ that of
water:
a)
An incompressible, nearly equal to b)
Compressible, less than
c)
Compressible, nearly equal to d)
Incompressible, greater than
38) Blood vessels are __ and they stretch like a
rubber hose:
a)
Rigid b)
Not rigid c)
Very hard d)
Very soft
39) A sphygmomanometer is an instrument used to:
a)
Get an X- ray b)
Measure blood pressure c) Test the
blood glucose d) Test the heart
beat
40) Normally the pressure of blood inside the walls
is __ then external atmosphere pressure:
a)
Equal to b)
Greater than c)
Smaller than d) Non
of all
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