Deck 13: Scientific Principles and Materials

Question 1

All of the following are correct statements about braking EXCEPT ________.

A)Kinetic energy must be absorbed by the brake system
B)The heavier the vehicle, the greater the kinetic energy when moving
C)If the weight of the vehicle is doubled, the kinetic energy of a moving vehicle is doubled
D)Kinetic energy of a vehicle doubles when the speed doubles

Answer 1

Kinetic energy of a vehicle doubles when the speed doubles

Question 2

The brake pedal assembly uses a mechanical lever to ________.

A)Decrease the distance the brake pedal needs to be depressed by the driver
B)Increase the drivers force on the brake pedal applied to the master cylinder
C)Decrease the drivers force on the brake pedal applied to the master cylinder
D)Allow for clearance between the brake pedal and the floor when the brakes are applied

Answer 2

Increase the drivers force on the brake pedal applied to the master cylinder

Question 3

Technician A says that work is being performed if a force is being applied, yet the object does not move.Technician B says that torque is a twisting force that may or may not result in motion. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Answer 3

Technician B only

Question 4

Two technicians are discussing engine horsepower and torque figures. Technician A says that torque is measured on a dynamometer. Technician B says that horsepower is measured on a dynamometer. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 5

An example of a lever and mechanical advantage used on a vehicle is the ________.

A)Battery
B)Fuel tank
C)Radio volume control
D)Brake pedal

Question 6

Two technicians are discussing temperature and heat. Technician A says that temperature is the intensity of the heat source. Technician B says that heat is the amount of heat. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 7

Heat can move or travel by ________.

A)Convection
B)Radiation
C)Conduction
D)All of these

Question 8

Technician A says that zero degrees Celsius is the freezing temperature of water. Technician B says that 100 degrees Celsius is the boiling temperature of water. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 9

Technician A says that pure (distilled) water has a pH of 7. Technician B says that the pH of an acids is less than 7. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 10

Technician A says that the kinetic energy of a vehicle is proportional to its weight. Technician B says that the kinetic energy of a moving vehicle is directly proportional to its speed. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 11

What term describes the ability to do work?

A)Force
B)Potential
C)Energy
D)None of these

Question 12

Which type energy is contained by a fully charged battery that is NOT connected to anything?

A)Electronic
B)Kinetic
C)Potential
D)None of these

Question 13

Technician A says that torque always involves movement. Technician B says that torque may be multiplied by leverage. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 14

What term describes the result when force is used to move an object?

A)Work
B)Energy
C)Both A and B
D)Neither A nor B

Question 15

Work describes the movement of an object when force is applied?

Question 16

One horsepower is the power required to move ________ pounds a distance of one foot in one second.

A)33000
B)550
C)1
D)None of these

Question 17

A dynamometer actually measures ________ output of an engine.

A)Power
B)Torque
C)Force
D)None of these

Question 18

Horsepower is torque times RPM divided by ________.

A)5252
B)33000
C)550
D)None of these

Question 19

The energy of mass in motion is called ________.

A)Kinetic energy
B)Inertia
C)Potential energy
D)None of these

Question 20

The greater an object's mass at a given speed, the ________ kinetic energy it possesses.

A)Less
B)Greater
C)Equal
D)None of these

Question 21

Kinetic energy of a moving object increases at a rate that is ________.

A)Equal to its speed
B)Half its speed
C)The square of its speed
D)None of these

Question 22

The type of plastic can be determined by using a ________ test.

A)Color
B)Weight
C)Depression
D)Burn

Question 23

A lever pivots at a point known as a ________.

A)Fulcrum
B)Vortex
C)Hinge
D)None of these

Question 24

Which type lever increases force and changes direction?

A)Second class
B)First class
C)Both A and B
D)Neither A nor B

Question 25

Which type lever reduces force but increases the distance travelled?

A)Second class
B)Third class
C)Both A and B
D)Neither A nor B

Question 26

When used on the brake pedal, leverage produces a mechanical advantage expressed as ________.

A)Pedal ratio
B)Applied force
C)Both A and B
D)Neither A nor B

Question 27

Heat can be transferred by how many different methods?

A)Six
B)Three
C)Four
D)None of these

Question 28

Generally, materials that are good conductors of heat are also good conductors of electricity.

Question 29

Heat always flows from a cooler object to a warmer object.

Question 30

Caustic chemicals can be used to ________ the effect of acidic chemicals.

A)Decrease
B)Neutralize
C)Increase
D)None of these

Question 31

If a closed container of gas is compressed the volume of the gas will ________ and the temperature will ________.

A)Decrease; remain the same
B)Remain the same; become cooler
C)Decrease; increase
D)Increase; increase