Quiz about chapter11:Science and Engineering Quiz

Question 1

What are common units used in science and engineering?

Accepted Answer

SI units

Answer

Pounds

Answer

Inches

Answer

Gallons

Question 2

What is the fundamental SI unit for mass?

Accepted Answer

kilogram

Answer

metre

Answer

second

Answer

ampere

Question 3

Which unit is used to measure electric current?

Accepted Answer

ampere

Answer

candela

Answer

kelvin

Answer

mole

Question 4

What does the unit 'newton' measure?

Accepted Answer

Force

Answer

Pressure

Answer

Energy

Answer

Power

Question 5

How much energy is transferred when 1 joule of work is done?

Accepted Answer

When 1 newton of force moves through 1m

Answer

When 1 ampere of current flows for 1 second

Answer

When 1 watt of power is used for 1 second

Answer

When 1 candela of light intensity shines for 1 second

Question 6

What are the SI units for mass?

Accepted Answer

kilogram

Answer

meter

Answer

second

Answer

newton

Question 7

What is the SI unit for temperature?

Accepted Answer

kelvin

Answer

celsius

Answer

fahrenheit

Answer

joule

Question 8

What is the SI unit for force?

Accepted Answer

newton

Answer

pascal

Answer

watt

Answer

ampere

Question 9

What symbol is used to represent electric current?

Accepted Answer

A

Answer

V

Answer

W

Answer

J

Question 10

What are the SI units for electric current?

Accepted Answer

ampere

Answer

volt

Answer

watt

Answer

joule

Question 11

What happens when the forces acting on an object are equal and opposite?

Accepted Answer

C) The object will stay at rest or in equilibrium.

Answer

A) The object will move.

Answer

B) The object will change shape.

Answer

D) The object will increase in weight.

Question 12

If a person weighs 800N on Earth, how much would they weigh on the moon?

Accepted Answer

A) 133N

Answer

B) 800N

Answer

C) 160N

Answer

D) 50N

Question 13

Which material has the lowest density in the table?

Accepted Answer

Wood (oak)

Answer

Aluminium

Answer

Glass

Answer

Concrete

Question 14

According to the table, which material is denser, Mild steel or Cast iron?

Accepted Answer

Cast iron

Answer

Mild steel

Answer

Both have the same density

Answer

The table does not provide this information

Question 15

Which of the following is NOT a property of force?

Accepted Answer

Color

Answer

Size

Answer

Direction

Answer

Point of application

Question 16

What does pressure measure in the context of physics?

Accepted Answer

The ratio of force applied per unit area

Answer

The speed of an object

Answer

The volume of an object

Answer

The temperature of an object

Question 17

What is the formula to calculate pressure?

Accepted Answer

P = F / A

Answer

P = F x A

Answer

P = F + A

Answer

P = F - A

Question 18

What does the density of a body depend on?

Accepted Answer

The mass and volume of the body

Answer

The weight and height of the body

Answer

The color and shape of the body

Answer

The temperature and pressure of the body

Question 19

What is a moment in physics?

Accepted Answer

A force that produces a turning effect

Answer

A force that stops motion

Answer

A force that increases pressure

Answer

A force that decreases mass

Question 20

How can you increase the turning moment of a lever?

Accepted Answer

By increasing the force applied

Answer

By decreasing the length of the lever

Answer

By shortening the distance from the pivot

Answer

By using a lighter lever

Question 21

What is the turning moment when a force of 50N is applied at a distance of 0.2m from the nut?

Accepted Answer

10 Nm

Answer

5 Nm

Answer

15 Nm

Answer

20 Nm

Question 22

What is necessary to maintain equilibrium when several forces are acting on an object?

Accepted Answer

The total clockwise moment must be equal to the total anticlockwise moment

Answer

All forces must be equal

Answer

All forces must be applied in the same direction

Answer

The object must be stationary

Question 23

What happens when a mechanical system is in equilibrium?

Accepted Answer

C) Clockwise and anticlockwise movements are equal

Answer

A) It moves in one direction only

Answer

B) Clockwise movements are greater than anticlockwise movements

Answer

D) It falls apart

Question 24

What is the moment of a force?

Accepted Answer

A) The product of the force and the distance from the point of reference

Answer

B) The sum of all forces applied

Answer

C) The weight of the force

Answer

D) The speed of the force

Question 25

What is the total clockwise moment in the example given?

Accepted Answer

A) 30Nm

Answer

B) 10Nm

Answer

C) 3Nm

Answer

D) 5Nm

Question 26

What force is needed to preserve equilibrium in the example?

Accepted Answer

C) 10N

Answer

A) 3N

Answer

B) 5N

Answer

D) 30N

Question 27

What is heat energy transferred between two objects called?

Accepted Answer

Heat transfer

Answer

Temperature difference

Answer

Thermal equilibrium

Answer

Heat capacity

Question 28

What does temperature measure?

Accepted Answer

The average heat of particles in a substance

Answer

The type of material a body is made of

Answer

The amount of heat energy in a body

Answer

The total amount of energy in a substance

Question 29

What happens to solids, liquids, and gases when the temperature increases?

Accepted Answer

They expand

Answer

They contract

Answer

They evaporate

Answer

They freeze

Question 30

What is the SI unit of temperature?

Accepted Answer

Kelvin

Answer

Celsius

Answer

Fahrenheit

Answer

Degree

Question 31

What happens to the length of a material when it is heated and its temperature increases?

Accepted Answer

The length increases

Answer

The length decreases

Answer

The length remains the same

Answer

The material changes color

Question 32

Which of the following is NOT a mode of heat transfer?

Accepted Answer

Absorption

Answer

Conduction

Answer

Convection

Answer

Radiation

Question 33

What happens during conduction?

Accepted Answer

Heat is transferred from a warmer body to a cooler body when they are in direct contact.

Answer

Heat is transferred through empty space.

Answer

Heat is transferred through liquids and gases only.

Answer

Heat is transferred by electromagnetic waves.

Question 34

What is convection?

Accepted Answer

The cycle of warming and cooling in liquids and gases, where warmer parts move to cooler regions.

Answer

The transfer of heat through direct contact of solid materials.

Answer

The movement of heat through electromagnetic waves.

Answer

The process where heat is transferred through empty space.

Question 35

How does radiation differ from conduction and convection?

Accepted Answer

It can transfer heat through empty space without needing a medium.

Answer

It requires a medium like solids to transfer heat.

Answer

It involves the movement of liquids or gases.

Answer

It only occurs when materials are at the same temperature.

Question 36

According to the key points, when can heat energy be transferred between two bodies?

Accepted Answer

When they are at different temperatures and in contact.

Answer

When they are at the same temperature.

Answer

Only through liquids and gases.

Answer

Only in a vacuum.

Question 37

What is friction?

Accepted Answer

The force that opposes the motion between two surfaces in contact

Answer

The force that helps objects move smoothly over each other

Answer

The force that increases the speed of moving objects

Answer

The force that pulls objects towards the earth

Question 38

Which type of friction is required to start two surfaces moving over one another?

Accepted Answer

Static friction

Answer

Rolling friction

Answer

Fluid friction

Answer

Kinetic friction

Question 39

What would be the force required to move a load of 1250kg if the coefficient of friction between the load and the surface is 0.68?

Accepted Answer

8500N

Answer

850N

Answer

9180N

Answer

918N

Question 40

Which material combination has the highest static coefficient of friction according to Table 11.7?

Accepted Answer

Rubber on concrete

Answer

Teflon on Teflon

Answer

Steel on steel

Answer

Metal on metal (lubricated)

Question 41

What is the difference between static and kinetic friction?

Accepted Answer

Static friction occurs before movement starts, while kinetic friction occurs during movement.

Answer

Kinetic friction is always higher than static friction.

Answer

Static friction measures temperature, kinetic friction measures speed.

Answer

There is no difference; they are the same.

Question 42

What is the coefficient of friction between two surfaces primarily used for?

Accepted Answer

To provide a means of gripping between surfaces like rubber and concrete

Answer

To increase the heat between surfaces

Answer

To allow surfaces to slide easily over each other

Answer

To make surfaces shiny

Question 43

What happens when the coefficient of friction is low between two surfaces?

Accepted Answer

The surfaces can move relative to each other more easily

Answer

The surfaces cannot move at all

Answer

The surfaces produce a lot of heat

Answer

The surfaces stick together permanently

Question 44

Why is Teflon often used as a coating for moving parts in a mechanism?

Accepted Answer

To reduce friction and allow smooth movement

Answer

To increase friction

Answer

To make the parts colorful

Answer

To increase the weight of the parts

Question 45

What causes atoms in a solid to stay closely packed together?

Accepted Answer

Balance between repulsion and attraction forces

Answer

High temperature

Answer

Magnetic forces

Answer

Gravity

Question 46

What is found in the nucleus of an atom?

Accepted Answer

Protons and neutrons

Answer

Protons and electrons

Answer

Neutrons and electrons

Answer

Electrons only

Question 47

What do electrons do around the nucleus?

Accepted Answer

They orbit the nucleus

Answer

They stay still

Answer

They combine with protons

Answer

They escape from the atom

Question 48

What makes an atom electrically neutral?

Accepted Answer

Having an equal number of protons and electrons

Answer

Having no protons

Answer

Having more neutrons than protons

Answer

Having no electrons

Question 49

What can be said about the electrons in the outermost shells of an atom?

Accepted Answer

They are held less tightly

Answer

They are held very tightly

Answer

They do not interact with other atoms

Answer

They are not charged

Question 50

Convert a temperature of 68 degrees Fahrenheit to Celsius and Kelvin

Accepted Answer

20

Answer

30

Answer

40

Answer

50

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