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Bulk Matter - Online Test (12-12-2016)

30 Questions MCQ Test | Bulk Matter - Online Test (12-12-2016)

Description

This mock test of Bulk Matter - Online Test (12-12-2016) for Class 11 helps you for every Class 11 entrance exam. This contains 30 Multiple Choice Questions for Class 11 Bulk Matter - Online Test (12-12-2016) (mcq) to study with solutions a complete question bank. The solved questions answers in this Bulk Matter - Online Test (12-12-2016) quiz give you a good mix of easy questions and tough questions. Class 11 students definitely take this Bulk Matter - Online Test (12-12-2016) exercise for a better result in the exam. You can find other Bulk Matter - Online Test (12-12-2016) extra questions, long questions & short questions for Class 11 on EduRev as well by searching above.

QUESTION: 1

Bernoulli's principle states that, for streamline motion of an incompressible non-viscous fluid:

A.
pressure at any part + kinetic energy per unit volume = constant
B.
kinetic energy per unit volume + potential energy per unit volume = constant
C.
pressure at any part + potential energy per unit volume = constant
D.
pressure at any part + kinetic energy per unit volume + potential energy per unit volume = constant

Solution:

QUESTION: 2

When a gas or a liquid is subjected to an increased pressure, substance contracts, bulk strain is defined as

A.
final volume ⁄ original volume
B.
final pressure ⁄ original pressure
C.
change in volume ⁄ original volume
D.
original volume ⁄ change in volume

Solution:

QUESTION: 3

One litre of a certain fluid weighs 8N. What is its specific volume?

A.
2.03 x 10^{– 3} m³/kg
B.
20.3 x 10^{– 3} m³/kg
C.
12.3 x 10^{– 3} m³/kg
D.
1.23 x 10^{– 3} m³/kg

Solution:

QUESTION: 4

When is a liquid said to be not in a boiling or vaporized state?

A.
If the pressure on liquid is equal to its vapour pressure
B.
If the pressure on liquid is less than its vapour pressure
C.
If the pressure on liquid is more than its vapour pressure
D.
Unpredictable

Solution:

QUESTION: 5

When the angle between surface tension with the liquid (θ) is greater than 90^o, the liquid becomes

A.
flat
B.
concave upward
C.
convex upward
D.
Unpredictable

Solution:

QUESTION: 6

Newton's law of viscosity states that

A.
the shear stress applied to the fluid is directly proportional to the velocity gradient (du/dy)
B.
the shear stress applied to the fluid is inversely proportional to the velocity gradient (du/dy)
C.
the shear stress applied to the fluid is directly proportional to the specific weight of the fluid
D.
the shear stress applied to the fluid is inversely proportional to the specific weight of the fluid

Solution:

QUESTION: 7

Bernoulli's principle shows that, at points in a moving fluid where potential energy change is very small

A.
pressure is low where velocity is low and similarly, pressure is high where velocity is high
B.
pressure is low where velocity is high and conversely, pressure is high where velocity is low
C.
pressure becomes independent of velocity of moving fluid
D.
pressure remain independent of speed of stationary fluid

Solution:

QUESTION: 8

The location of the centre of pressure over a surface immersed in a liquid is

A.
always above the centroid
B.
will be at the centroid
C.
will be below the centroid
D.
for higher densities it will be above the centroid and for lower densities it will be below the centroid

Solution:

QUESTION: 9

If fluid has constant density then it is said to be

A.
thick
B.
in-viscous
C.
compressible
D.
incompressible

Solution:

QUESTION: 10

According to equation of continuity product of area of pipe and speed of fluid along pipe is

A.
1
B.
0
C.
constant
D.
different

Solution:

QUESTION: 11

Constant of equation of continuity is known as

A.
flow rate
B.
friction
C.
fluid flow
D.
surface tension

Solution:

QUESTION: 12

When net force acting on a droplet becomes zero then it falls with

A.
increasing speed
B.
decreasing speed
C.
constant speed
D.
zero velocity

Solution:

QUESTION: 13

A wire of length L and cross section area A is made of a material of Young's modulus Y. If the wire is stretched by an amount x, the work done is

A.
2YAx²/L
B.
YAx²/L
C.
YAx/2L
D.
YAx³/2L

Solution:

QUESTION: 14

For elastomers, stress and strain variation is _________ within elastic limit.

A.
a straight line
B.
an elliptical
C.
not a straight line
D.
none of the above

Solution:

QUESTION: 15

The area occupied below the stress-strain graph and above strain axis gives the value of

A.
energy stored in the material
B.
work done in producing extension
C.
restoring force
D.
energy density of the material

Solution:

QUESTION: 16

A wire whose cross-section is 4 mm² is stretched by 0.1 mm by a certain weight. How far will a wire of the same material and length be stretched, if its cross-sectional area is 8 mm² and the same weight is attached?

A.
0.05 mm
B.
0.06 mm
C.
0.5 mm
D.
1.0 mm

Solution:

QUESTION: 17

In Hooke's law, the constant of proportionality signifies

A.
elasticity of wire
B.
modulus of elasticity
C.
modulus of stress
D.
modulus of strain

Solution:

QUESTION: 18

The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential energy stored in it is

A.
16U
B.
4U
C.
U/4
D.
8U

Solution:

QUESTION: 19

How does the modulus of elasticity change with temperature?

A.
It sometimes increases, sometimes decreases with increase in temperature
B.
It does not depend on temperature
C.
It increases with increase in temperature
D.
It decreases with increase in temperature

Solution:

QUESTION: 20

A body is said to be perfectly elastic if

A.
its surface is perfectly smooth
B.
it can move freely
C.
it recovers its original shape / size when the deforming force is removed
D.
it is not effected by external force

Solution:

QUESTION: 21

Which of the following factors can bring about a change in the elastic properties of a material?

A.
Change in temperature
B.
Presence of impurities
C.
Both (i) and (ii)
D.
None of the above

Solution:

QUESTION: 22

The modulus of elasticity of steel is greater than that of rubber because under the same stress

A.
the strain in steel is less than rubber
B.
the strain in steel is more than rubber
C.
elongation in steel is more than in rubber
D.
none of the above

Solution:

QUESTION: 23

A uniform rod of mass m, length L, area of cross-section A and Young's modulus Y hangs from a ceiling. Its elongation under its own weight will be

A.
2mgL/AY
B.
mgL/2AY
C.
mgL/AY
D.
zero

Solution:

QUESTION: 24

Materials that show very small plastic range beyond elastic limit are called

A.
Elastic materials
B.
Elastomers
C.
Brittle materials
D.
Ductile materials

Solution:

QUESTION: 25

Velocity of efflux flowing through an orifice at height h below the free surface of liquid is given by

A.
B.
v²=2gh
C.
D.
v = 2gh

Solution:

QUESTION: 26

A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250 m². Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be (P_air = 1.2 kg/m³)

A.
4.8 × 10⁵ N, upwards
B.
2.4 × 10⁵ N, downwards
C.
4.8 × 10⁵ N, downwards
D.
2.4 × 10⁵ N, upwards

Solution:

QUESTION: 27

A flat plate is separated from a large plate by a layer of glycerine of thickness 3 X 10^-3m. If the co-efficient of viscocity of glycerine is 2 Nsm², what is the force required to keep the plate moving with a velocity of 6 X 10^-2m/s. Area of the plate is 4.8 X 10^-3m².

A.
0.192 N
B.
19.2 N
C.
1.92 N
D.
192 N

Solution:

QUESTION: 28

Which of the following assumptions is not considered while arriving at Stoke's law.

A.
There is no slip between the fluid layers
B.
Spherical body is perfectly rigid and smooth
C.
The viscosity of the medium is homogeneous and of infinite extent
D.
The velocity of the body is small, so that motion of fluid relative to body is streamlined

Solution:

QUESTION: 29

Find the Reynold's number for the liquid flowing in a pipe of diameter 1.2 cm with average velocity 15 cm/s. Take = 0.01 poise and = 0.9 gm/cc.

A.
16.20
B.
162.0
C.
1620
D.
1.620

Solution:

QUESTION: 30

A student is performing a test experiment in his laboratory. He takes glycerine, buttermilk and water in three beakers and stirs them thoroughly. He then places the beaker on the table simultaneously. Which of the following will be observed?

A.
Glycerine will come to rest first.
B.
All the three liquids will come to rest simultaneously.
C.
Water will come to rest first.
D.
Buttermilk will come to rest first.

Solution:

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Bulk Matter - Online Test (12-12-2016)

30 Questions MCQ Test | Bulk Matter - Online Test (12-12-2016)

Bernoulli's principle states that, for streamline motion of an incompressible non-viscous fluid:

When a gas or a liquid is subjected to an increased pressure, substance contracts, bulk strain is defined as

One litre of a certain fluid weighs 8N. What is its specific volume?

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