Deck 12: Engine Theories and Performance Systems

Question 1

Liquids that are heated enough will change to a vapor.

Answer 1

True

Question 2

Two technicians are discussing horsepower and torque. Technician A says that horsepower is needed in keeping up with interstate traffic. Technician B says that torque refers to a twisting force. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Answer 2

C

Question 3

Newton's Third Law of Motion says that for every action, there is an equal and opposite reaction.

Answer 3

True

Question 4

The first law of thermodynamics states that _____.

A) in a perfect engine all of the heat is converted to mechanical work
B) torque is a measure of work
C) resistance is work that results from burning fuel
D) energy cannot be created or destroyed

Question 5

Work in an engine can be measured as _____.

A) mass
B) psi
C) BTUs
D) horsepower and torque

Question 6

What happens as a liquid changes to a vapor?

A) It greatly decreases in volume.
B) It decreases in temperature.
C) It greatly increases in volume.
D) The volume remains the same.

Question 7

Most lightweight vehicles use gasoline that is rated at about 190,000 British Thermal Units per gallon.

Question 8

What is true of automobile design?

A) Aerodynamically designed vehicles provide better fuel economy.
B) Seat belts are nonstandard equipment.
C) Crumple zones provide the most protection at speeds above 40 mph.
D) Materials used now are the same as in the 1970s.

Question 9

A perpetual energy device would produce more energy than it consumes.

Question 10

Two technicians are discussing vehicle design. Technician A says that vehicle components have been researched and designed to satisfy the laws of physics. Technician B says that aerodynamics was not a concern until recent history. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 11

Thermodynamics is the study of using refrigeration to perform mechanical work.

Question 12

Which statement is true of energy?

A) The motion of an object produces potential energy.
B) Potential energy is based on the mass and position of a stationary object.
C) Kinetic energy is available energy based on an object's position.
D) Energy is the pressure of one mass against another.

Question 13

Horsepower is work done in a straight line.

Question 14

Kinetic energy is available energy based on the position of an object.

Question 15

Crumple zones are designed to transfer impact energy to the passenger compartment.

Question 16

Two technicians are discussing hydraulic theory. Technician A says that any fluid will work in a hydraulic system. Technician B says that the fluid must be matched to the application. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 17

Two technicians are discussing atmospheric pressure. Technician A says that atmospheric pressure can achieve work. Technician B says that the earth has sufficient natural vacuum to perform automotive work. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 18

Two technicians are discussing thermodynamics. Technician A says that energy cannot be created or destroyed. Technician B says that energy can be exhausted. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 19

When a liquid is compressed, its temperature rises in direct proportion to the pressure applied.

Question 20

In recent times, aerodynamics has become an important consideration in building everyday vehicles.

Question 21

Define work.

Question 22

What speed of impact must newer cars withstand?

Question 23

Which measurement of engine power measures twisting force?

Question 24

The application of thermodynamics in an engine requires what four elements?

Question 25

What is one major drawback of smaller-size vehicles for the technician?

Question 26

Which equation is an appropriate expression of Pascal's Law?

A) P=F/A
B) A=P/F
C) P=FA
D) F=P/A

Question 27

What is the calculation for horsepower when related to torque?

Question 28

What is aerodynamics?

Question 29

What is required to meet CAFE regulation?

A) Seatbelts
B) Hydraulic fluids
C) Horsepower
D) Fuel mileage

Question 30

Who formulated a law in 1647 about hydraulic theory?

Question 31

Why is tap water not used in braking systems?

A) It is incompressible.
B) Its boiling point is too high.
C) Its boiling point is too low.
D) It resists corrosion.

Question 32

The downward movement of the piston in the cylinder creates _____ above the piston.

A) a vacuum
B) high pressure
C) atmospheric pressure
D) work

Question 33

Describe the theory of thermodynamics.

Question 34

Which of Newton's Laws deals with inertia?

Question 35

Describe pressure.

Question 36

Describe Newton's First Law of Motion.

Question 37

What is defined as any pressure less than atmospheric?

Question 38

Describe potential energy.

Question 39

At a vehicle's maximum speed, the _____ forces equal the _____ forces.

A) forward; air
B) driving; resisting
C) Pascal's; Newton's
D) mass; weight

Question 40

Describe how hydraulic fluids are selected.