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Practice Quiz Engphys 2

Total questions: 90

Worksheet time: 23hrs 30mins

Name
Class
Date
1.
If F is force, k is spring constant and x is extension, Hooke's Law tells us that:
a)
F=k/x
b)
x=Fk
c)
k=Fx
d)
F=kx
2.
Hooke's Law fails when a material reaches its:
a)
breakdown
b)
elastic limit
c)
end of tether
d)
fracture stress
3.
A graph of extension against force for an elastic material is:
a)
A downward curve
b)
An upward curve
c)
A straight line from any point on the x and y axis
d)
A straight line from the origin
4.
A spring has a spring constant of 5N/cm.  What is its extension when loaded with 15N?
a)
4cm
b)
5cm
c)
3m
d)
3cm
5.

What is the quantity that can you calculate from the graph? Give the magnitude of that quantity.  

a)
distance 4.5 m
b)
Force 15 N
c)
spring constant 20 N/m
d)
spring constant 200 N/m
6.
If F is force, k is spring constant and x is extension, Hooke's Law tells us that:
a)
F=k/x
b)
x=Fk
c)
k=Fx
d)
F=kx
7.

What type of force is shown on the picture?

a)

Tension

b)

Friction

c)

Elastic

d)

Electromagnetic

8.
Which statement most accurately represents Hooke's Law?
a)
a) Extension of a spring is proportional to the force applied.
b)
b) Extension of a spring is proportional to the number of coils.
c)
c) Extension of a spring is inversely proportional to the force applied.
d)
d) Thickness of a spring wire is proportional to the force applied.
9.

Spring constant is measured in

a)

N

b)

N/m

c)

m

10.

The relationship between stretching force, F, with the extension, x, of a spring, is given by the equation: F = kx where k is the spring constant. What is the unit of k?

a)

N m-1

b)

N m-2

c)

kg m-1

d)

kg m-1

11.

Which graph shows the correct relationship between the force, F, and the extension, x of a spring?

a)

A

b)

B

c)

C

d)

D

12.

The diagram shows a load M supported by the arrangement of springs P, Q and R. All the springs are identical.

Which comparison is correct about the extension of P, Q and R?

a)

P < Q < R

b)

Q < R < P

c)

R < Q < P

d)

Q < P < R

13.

Diagram 13 shows three springs arrangements, P , Q and R. All spring used are identical.

Which comparison of the length of spring arrangement, P, Q and R is correct when weight of 1 kg is hung?

a)

R > P > Q

b)

P > R > Q

c)

P > Q > R

d)

R > Q > P

14.

All physical bodies are perfectly elastic

a)

True

b)

False

c)

Both

15.

Strain has no dimensions and Units.

a)

True

b)

False

c)

Both

d)

I don't know

16.

Volume StressVolume Strain= ?\frac{Volume\ Stress}{Volume\ Strain}=\ ?  

a)

Young's modulus

b)

Shear modulus

c)

Bulk modulus

d)

none of the choices

17.

Resistance of a material to change in shape and size.

Which of the mechanical properties has the above behaviour?

a)

Strength

b)

Stiffness

c)

Elasticity

d)

Ductility

18.

Plastic deformation occurs when a material is deformed beyond its elastic limit.

a)

True

b)

False

19.

The straight line graph (OA) obeys Hooke’s law which states ‘Below the proportionality limit, the restoring force, 𝐹𝑠 is INVERSELY proportional to the extension, 𝐹𝑠=−𝑘𝑥, where 𝑥 is the amount of extension.

a)

True

b)

False

20.

What happened at point D?

a)

The change in the internal structure of the material.

b)

The force (stress) on the material is maximum and is known as the breaking force (stress).

c)

This is the point where the material breaks or fractures.

21.

Young’s modulus DOES NOT depend to the length of the wire, but it depends on the MATERIAL that made the wire.

a)

True

b)

False

22.

Viscosity can be described as...

a)

a physical property of liquids

b)

a physical property of solids

c)

a chemical property of liquids

23.

High viscosity can be described as...

a)

a liquid that flows quickly

b)

a liquid that flows slowly

24.

Parallel forces acting in opposite directions

a)

compression

b)

shear

c)

tension

25.

A cylindrical rod of cross-sectional area A experienced pressure p due to a compressive force F. If the force applied is reduced to one-third what happens to pressure?

a)

also reduced to one-third

b)

tripled

c)

remains the same

26.

Liquids with very low viscosity ,flow very _______________________.

a)

fast

b)

not at all

c)

slow

d)

whenever it wants

27.

Which type of fluid flow is smooth, and predictable?

a)

Turbulent

b)

Viscous

c)

Laminar

d)

Inertial

28.

stress

a)

the process by which the shape of a rock changes because of stress

b)

the amount of force per square unit area on a given material

c)

stress that occurs when an object is stretched

d)

stress that occurs when an object is squeezed

29.

A force that is experienced by an object that is being pulled in opposite directions is called...

a)

Compression

b)

Tension

c)

Torsion

d)

Shear

30.

A force that is experienced by pushing two points towards each other.

a)

Compression

b)

Tension

c)

Torsion

d)

Shear

31.

A force that is being applied in opposite but parallel directions is called...

a)

compression

b)

tension

c)

torsion

d)

shear

32.

What is the deformation of materials in response to stress?

a)

Stress

b)

Strain

c)

Elastic Deformation

d)

Plastic Deformation

e)

Fault

33.

Which letter is pointing to the elastic limit?

a)

A

b)

B

c)

C

d)

D

34.

Which letter points to the section that shows elastic deformation?

a)

A

b)

B

c)

C

d)

D

35.

Which letter is pointing to where the material will break?

a)

A

b)

B

c)

C

d)

D

36.

All fluids are:

a)

gases

b)

liquids

c)

gases or liquids

d)

non-metallic

37.
Which of the following is a fluid?
a)
helium
b)
ice
c)
iron
d)
gold
38.
Which of the following is NOT a fluid?
a)
carbon dioxide
b)
hydrogen
c)
seawater
d)
wood
39.
Which of the following statements is NOT correct?
a)
A fluid flows
b)
a fluid has a definite shape
c)
molecules of a fluid are free to move past each other
d)
a fluid changes it shape easily
40.

To obtain the absolute pressure from the gauge pressure:

a)

subtract atmospheric pressure

b)

add atmospheric pressure

c)

subtract 273

d)

add 273

41.

Several cans of different sizes and shapes are all filled with the same liquid to the same depth. Then,

a)

The pressure on the bottom of each can is the same

b)

The weight of the liquid on the bottom of each can is the same

c)

The least pressure is at the bottom of the can with the largest bottom area

d)

the force of the liquid on the bottom of each can is the same

42.

The vessels shown above all contain water to the same height. Rank them according to the pressure exerted by the water on the vessel bottoms, least to greatest.

a)

1,2,3,4

b)

3,4,2,1

c)

4,3,2,1

d)

2,3,4,1

e)

All pressures are the same

43.

The diagram shows a U-tube with cross-sectional area A and partially filled with oil of density  ρ\rho  . A solid cylinder, which fits the tube tightly but can slide without friction, is placed in the right arm. The system is in equilibrium. The weight of the cylinder is:

a)

ALρgAL\rho g  

b)

L3ρgL^3\rho g  

c)

Aρ(L+h)gA\rho\left(L+h\right)g  

d)

Aρ(L−h)gA\rho\left(L-h\right)g  

44.
Archimedes' Principle states that... 
a)
The buoyant force acting on an object equals the volume of the fluid displaced by the object. 
b)
The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
c)
The buoyant force acting on an object will always be equal. 
45.

According to Archimedes' principle, if a body is immersed partially or fully in a fluid then the buoyancy force is _______ the weight of fluid displaced by the body.

a)

equal to

b)

less than

c)

more than

d)

unpredictable

46.

If the weight of an object is < the Buoyant Force, the object will ......................

a)

Sink

b)

Rise

c)

Remain at the same level

47.
Which direction does buoyant force always push?
a)
downward
b)
upward
c)
all directions
d)
sponge bob
48.

According to Bernoulli's theorem in a flowing liquid

a)

velocity is inversely proportional to pressure

b)

velocity is directly proportional to pressure

c)

velocity is directly proportional to volume

49.
Which of the following is NOT an example of laminar flow?
a)
a river moving slowly in a straight line
b)
smoke rising upward in a smooth column through air
c)
water flowing evenly from a slight opened faucet
d)
smoke twisting as it moves upward from a fire
50.
Which of the following properties is NOT a characteristic of an ideal fluid?
a)
laminar flow
b)
turbulent flow
c)
nonviscous
d)
incompressable
51.

What is an ideal fluid?

a)

A fluid which has no viscosity

b)

A fluid which is incompressible

c)

A fluid which has no surface tension

d)

All the above

52.

Bernoulli's equation cannot be used for flow of water in river because the flow is

a)

streamlined

b)

turbulent

c)

laminar

d)

viscous

53.

Due to Bernoulli's principle, the pressure is ............... above an airplane's wing than below it.

a)

Lower

b)

Higher

54.
States that as the velocity of a fluid increases, the pressure decreases.  This causes planes to fly . 
a)
Archimedes' Principle
b)
Bernoulli's Principle
c)
Pascal's Principle
55.

Bernoulli's principle states that as the velocity of a fluid ______, the pressure exerted by the fluid ______

a)

increases; increases

b)

decreases; decreases

c)

increases; decreases

d)

decreases; increases

56.

As the temperature of a substance rises, the average kinetic energy of the particles making up the substance

a)

increases

b)

decreases

c)

remains the same

57.

When are two objects consider to be at thermal equilibrium

a)

when one object is hotter than the other

b)

when on object is colder than the other

c)

when one object is at the same temperature as the other

58.

 The liquid in the thermometer rises when it is placed in the hot water because

a)

it gains heat from the hot water and expands

b)

loses heat from the hot water and contracts

c)

the surrounding air is too warm

d)

the liquid is boiling

59.

How much energy is required to increase the temperature of 1g of water 1°C?

【specific heat capacity of water = 4200 J/kg°C】

a)

2260 J

b)

334 J

c)

100 J

d)

4.20 J

60.

The specific heat of aluminum is 900 J/kg°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

a)

450 J

b)

900 J

c)

45 J

d)

90 J

61.

Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using the same thermal energy.  What material would be the coolest after being heated?

a)

Copper

b)

Carbon Steel

c)

Zinc

d)

Stainless Steel

62.

In nature, heat always flows from a:

a)

cold object to a warm object.

b)

small object to a big object.

c)

warm object to a cold object.

d)

large object to a small object

63.

Mix 700 g of water at 100°C with 500 g of water at 30°C. Find the final temperature of the water.

【specific heat capacity of water = 4200 J/kg°C】

a)

65 °C

b)

42.5 °C

c)

70.8 °C

d)

45.8 °C

64.

For a steel rod with a radius of 7 cm, if the temperature rises from 30 ℃ to 300 ℃, What will the cross sectional area become?

[coefficient of linear expansion of steel = 1.1×10−5 K−11.1\times10^{-5}\ K^{-1}  

a)

1.55×10−2 m21.55\times10^{-2\ }m^2  

b)

2.16×10−2 m22.16\times10^{-2\ }m^2  

c)

1.54×10−2 m21.54\times10^{-2\ }m^2  

d)

2.22×10−2 m22.22\times10^{-2\ }m^2  

65.

The linear expansion coefficient of glass is 1×10−5 K−11\times10^{-5}\ K^{-1}   , and the volume expansion coefficient of water is 6×10−4 K−16\times10^{-4}\ K^{-1}  . If the volume of the open glass bottle is 500 ml , filled with water, and the temperature rises from 7°C to 77°C, how much water will overflow during this process? 

a)

19.95 ml

b)

20.65 ml

c)

21.00 ml

d)

0.35 ml

66.

Winnie uses a 0.7 kW heater to completely turn 700g of water at 10 ℃ into water vapor at 100 ℃. How long does it take?

specific heat capacity of water = 4200 J/kg℃

latent heat of vaporisation of water = 2260000 J/kg

a)

10 min

b)

12 min

c)

8 min

d)

6 min

67.
What happens to air particles when they are heated?
a)
Particles move faster and expand
b)
Particles move faster and become closer together.
c)
Particles move slower and the air expands
d)
Particles move faster become further apart
68.

The picture shows a bimetallic strip in a fire alarm. When there is a fire outbreak, the bimetallic strip will get hot, ....

a)

bend downwards, complete the circuit and the alarm rings.

b)

bend upwards, open the circuit and the alarm will not ring.

c)

becomes longer, open the circuit and the alarm will not ring.

69.
When objects contract upon cooling...
a)
volume increases and density increases.
b)
volume increases and density decreases.
c)
volume decreases and density decreases.
d)
volume decreases and density increases.
70.
Alex noticed that a metal door that sticks on hot days does not stick when it cools off at night. This is because the metal contracts as it cools. The reason for this is that, as the metal cools, the atoms:
a)
become smaller and take up less space
b)
 slow down and move closer together
c)
merge together to form fewer atoms
d)
speed up and move farther apart
71.

When atoms vibrate more, they

a)

become further apart

b)

become closer together

c)

not changing distance

72.
What is the definition of CONDUCTION?
a)
When heat is transferred from objects like rays of light or electromagnetically.
b)
a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
c)
When heat transfers from objects that are touching.
d)
When heat transfers through the heater or AC in your house.
73.
dark colored surfaces _________ radiation
a)
reflect 
b)
absorb
74.
Land heats up and cools down faster than water.
a)
True
b)
False
75.

What type of heat transfer takes place when you touch a warm mug of hot chocolate?

a)

Radiation

b)

Convection

c)

Conduction

d)

None of the above

76.

Conduction requires

a)

Electricity

b)

the electromagnetic spectrum and particles

c)

air or water flow

d)

direct contact

77.

If you walk barefoot on hot asphalt, energy is transferred by which process?

a)

Convection

b)

Radiation

c)

Conduction

d)

Reflection

78.
The earth receives heat energy from the sun by _______________, which is the transfer of energy as electromagnetic waves?
a)
radiation
b)
convection
c)
conduction
d)
greenhouse effect
79.

When air is heated, what happens to its mass?

a)

increases

b)

decreases

c)

remains the same

80.

When air is heated, its volume ____________.

a)

increases

b)

decreases

c)

remains the same

81.

When air is heated, its density ___________.

a)

increases

b)

decreases

c)

remains the same

82.

In the process of convection, energy is transferred _________.

a)

because of temperature differences in a solid

b)

because of density differences in a liquid

c)

by the diffusion of molecules throughout a fluid

d)

by the vibration of molecules

83.

Some dye in a beaker of water is gently heated. Why are the streaks of dye seen in the water?

a)

The hot dye is a better conductor than the cool water.

b)

The hot dye is a better convector than the cool water.

c)

The hot water is less dense than the cool water.

d)

The hot water is denser than the cool water.

84.

By which process is thermal energy transferred through a vacuum?

a)

conduction only

b)

convection only

c)

conduction and convection only

d)

radiation only

85.

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

a)
one reaches a temperature of zero
b)
they both have an equal temperature
c)
one runs out of energy
86.
If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C? 
a)
-80,371.2
b)
44,938.6
c)
80,371.2
d)
112,575.9
87.
What is the specific heat of an unknown substance if 20 kg of it at 400 °C reaches an equilibrium temperature of 351 °C when it comes in contact with a piece of aluminum.  The aluminum weighs 55 kg and had an initial temperature of 4 °C?  (Specific heat of aluminum is 903 J/kg °C)  Use the equation mC(Tf – Ti) + mC(Tf – Ti)= 0
a)
17,233,755
b)
-17,233,755
c)
17,585.46
d)
723
88.
For a skillet, used for cooking, do you want a high or low specific heat
a)
High, so that it will need more energy to heat up
b)
Low, so that it will change temperature quickly
89.
Steam at temperature of 100°C is piped to 3 kg of water at the temperature of 5°C until the water reaches the boiling point. The mass of the steam required is
[Specific latent heat of vaporization of water = 2.26 × 106 J kg−1, specific heat capacity of water = 4.2 × 103 J kg−1°C−1]
a)
0.26 kg
b)
0.53 kg
c)
0.94 kg
d)
1.89 kg
90.
A metal cube at temperature of 10°C immersed in a liquid at temperature of 70°C.
What is the temperature of the metal cube when thermal equilibrium is achieved between the cube and the liquid?
a)
Between 10°C and 70°C
b)
More than 70°C
c)
Less than 10°C
d)
Same as the room temperature

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