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Online Tests
PPSC Physics Chapter 2 Structural Properties of Matter MCQs With Answers
Question # 1
When the deforming force applied on a body produces change in length then it is said to be
Choose an answer
Tensile stress
compression stress
Shear stress
Shear modulus
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Question # 2
The terminal velocity in case of spherical droplet is directly proportional to.
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Square of the radius of the droplet
Radius of the droplet
Cube of the radius of the droplet
Half of the Radius of the droplet half
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Question # 3
If a liquid does not wet a solid surface, the angle of contact is.
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Less than 90
o
Greeter than 180
o
90
o
Between 90
o
and 180
o
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Question # 4
Drag force between two layers under consideration depends on
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Distance between the layers
Surface area of layers
Relevant velocity between them
All of the above
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Question # 5
The maximum stress a solid material can sustain with out undergoing permanent deformation is called.
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elastic limit
Plastic
elastic deformation
Plastic deformation
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Question # 6
A small and a large rain drops are falling thgouth all.
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Large drop falls faster
Both move with same velocity
Small drop falls faster
Small drop does not fall
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Question # 7
A tank 3 m long 1 m wide and 0.5 m deep is filled with oil which weight 12,000 N . The pressure on the base of the tank due to oil is.
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1,000 Pa
4,000 Pa
3,000 Pa
6,000 Pa
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Question # 8
Amorphous solids are also called.
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Crystalline solids
Glassy solids
Polymeric solids
Polymers
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Question # 9
A liquid surface tend to contract this phenomenon is due to
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Viscosity
Diffusion
Density
surface tension
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Question # 10
Which type of solid have definite melting point.
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Crystalline solids
Amorphous solids
Glassy solids
Polycrystalline solids
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Question # 11
The force applied on unit area of a body to produce any change in shape volume or length is known as.
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Strain
Stress
Tensile strain
Tensile stress
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Question # 12
Minor losses through values, fittings, bends etc are modeled as proportional to
Choose an answer
Velocity head
Static head
total head
Pressure drop
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Question # 13
The smooth and steady streamline flow is known as
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Turbulent flow
Laminar flow
Regular flow
Irregular flow
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Question # 14
An instrument which can float in the liquid to be tested and by means of which the specific gravity of the liquid may be determined is.
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Hydrometer
Barometer
Siphon
Lactometer
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Question # 15
Gases have
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Fixed shape
Fixed volume
Fixed shape and volume
No fixed shape and volume
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Question # 16
The dimensions of strain are.
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[MLT-2]
[ML-1T-2]
[ML-2T-3]
It is a dimensionless quantity
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Question # 17
The property of a material to return to it original shape and size on the removal of an external force is called.
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Stress
Strain
Toughness
Elasticity
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Question # 18
When a tennis balls is hit by a racket inasmuch a way that it spins as well as moves forward the velocity of the air on one side of the ball
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Increases
Decreases
Remain constant
Become zero
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Question # 19
Molecules of a liquid
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Do not vibrate about their mean position
Are rigidly held with each other
Have weak attractive forces
Have strong attractive forces
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Question # 20
Bernoulli's equation is Applica table to points
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In a steady flowing liquid
In a streamline
In a straight line perpendicular to steamline
In any non viscous liquid
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Question # 21
The SI unit of stress is
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kg m s-2
kg m-1 s-2
N m-2
N m-1
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