Question 1

Piston or cylinder ____________________ refers to the volume that the piston displaces in the cylinder as it moves from TDC to BDC.

Accepted Answer

displacement

Question 2

Engine dynamometers are used in emission control testing programs because testing of oxides of nitrogen can only be done when the engine is under load.

Accepted Answer

A) True 
 B)False  False

Question 3

What is the difference between horsepower and torque?

Accepted Answer

Horsepower is a measure of work performed in a straight line in a specified time. Torque measures force in a rotating direction.

Question 4

When an engine has a cylinder bore that is larger than its stroke, this is called a(n) ____________________ engine.

Accepted Answer

The answer of When an engine has a cylinder bore...

Question 5

The compression ratio determines how much the air and fuel are compressed on the compression stroke.

Accepted Answer

A) True 
 B)False

Question 6

A simple dynamometer that uses friction is called a(n) ____________________.

Accepted Answer

The answer of A simple dynamometer that uses friction is...

Question 7

While having a discussion about torque, Technician A says that the force of 1 pound exerted at a distance of 1 foot from the center of a crankshaft results in 2 foot-pound of torque. Technician B says it results in 1 foot-pound of torque. Who is correct?

Accepted Answer

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

Question 8

All of the following are measurements of engine horsepower EXCEPT:

Accepted Answer

A)  brake horsepower 
B)  indicated horsepower 
C)  frictional horsepower 
D)  dyno horsepower 
A)  brake horsepower 
B)  indicated horsepower 
C)  frictional horsepower 
D)  dyno horsepower

Question 9

What is the difference between net horsepower and gross horsepower?

Accepted Answer

Net horsepower is the maximum power avai

Question 10

The ____ is the distance that the piston moves from TDC to BDC.

Accepted Answer

A)  oversquare 
B)  crank throw 
C)  foot-pound 
D)  piston stroke 
A)  oversquare 
B)  crank throw 
C)  foot-pound 
D)  piston stroke

Question 11

Briefly define the terms volumetric efficiency and thermal efficiency.

Accepted Answer

Volumetric efficiency determin

Question 12

Which of the following statements is LEAST-Likely to be correct?

Accepted Answer

A)  A chassis dyno measures horsepower available at the vehicle's drive wheels. 
B)  Road horsepower is always greater than brake horsepower. 
C)  On a chassis dynamometer, one roller is attached to the power absorption unit and the other is an idle roller. 
D)  Chassis dynamometers can be driven by the wheels or connected directly to the hubs. 
A)  A chassis dyno measures horsepower available at the vehicle's drive wheels. 
B)  Road horsepower is always greater than brake horsepower. 
C)  On a chassis dynamometer, one roller is attached to the power absorption unit and the other is an idle roller. 
D)  Chassis dynamometers can be driven by the wheels or connected directly to the hubs.

Question 13

All of the following statements are correct EXCEPT:

Accepted Answer

A)  a higher compression ratio can increase an engine's power and fuel economy. 
B)  compression ratio has an effect on the amount of power an engine can produce by increasing the thermal efficiency of the engine. 
C)  compression pressure is the amount of pressure made by the piston moving up in the cylinder in pounds per square inch (psi) or kilopascals (kPa). 
D)  higher compression engines produce less exhaust emissions. 
A)  a higher compression ratio can increase an engine's power and fuel economy. 
B)  compression ratio has an effect on the amount of power an engine can produce by increasing the thermal efficiency of the engine. 
C)  compression pressure is the amount of pressure made by the piston moving up in the cylinder in pounds per square inch (psi) or kilopascals (kPa). 
D)  higher compression engines produce less exhaust emissions.

Question 14

Heat is measured in British thermal units (Btu).

Accepted Answer

A) True 
 B)False

Question 15

While having a discussion, Technician A says that engine displacement is determined by multiplying the cylinder displacement by the number of cylinders. Technician B says that it is determined by multiplying the swept volume of the cylinder by the number of cylinders. Who is correct?

Accepted Answer

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

Question 16

What are the characteristics of oversquare and undersquare engines?

Accepted Answer

Characteristics of oversquare engines, w

Question 17

____________________ is defined as any action that changes, or tends to change, the position of something.

Accepted Answer

The answer of ____________________ is defined as any action that...

Question 18

Cylinder ____________________ in automobile engines usually range from about 3.5" to 4".

Accepted Answer

The answer of Cylinder ____________________ in automobile engines usually range...

Question 19

An engine's size is determined by the volume of air that its pistons displace in the cylinders.

Accepted Answer

A) True 
 B)False

Question 20

What is the difference between energy and inertia?

Accepted Answer

Energy is the ability to do work, or the

Exam 17: Engine Size and Measurements

Piston or cylinder ____________________ refers to the volume that the piston displaces in the cylinder as it moves from TDC to BDC.

Engine dynamometers are used in emission control testing programs because testing of oxides of nitrogen can only be done when the engine is under load.

What is the difference between horsepower and torque?

When an engine has a cylinder bore that is larger than its stroke, this is called a(n) ____________________ engine.

The compression ratio determines how much the air and fuel are compressed on the compression stroke.

A simple dynamometer that uses friction is called a(n) ____________________.

While having a discussion about torque, Technician A says that the force of 1 pound exerted at a distance of 1 foot from the center of a crankshaft results in 2 foot-pound of torque. Technician B says it results in 1 foot-pound of torque. Who is correct?

All of the following are measurements of engine horsepower EXCEPT:

What is the difference between net horsepower and gross horsepower?

The ____ is the distance that the piston moves from TDC to BDC.

Briefly define the terms volumetric efficiency and thermal efficiency.

Which of the following statements is LEAST-Likely to be correct?

All of the following statements are correct EXCEPT:

Heat is measured in British thermal units (Btu).

While having a discussion, Technician A says that engine displacement is determined by multiplying the cylinder displacement by the number of cylinders. Technician B says that it is determined by multiplying the swept volume of the cylinder by the number of cylinders. Who is correct?

What are the characteristics of oversquare and undersquare engines?

____________________ is defined as any action that changes, or tends to change, the position of something.

Cylinder ____________________ in automobile engines usually range from about 3.5" to 4".

An engine's size is determined by the volume of air that its pistons displace in the cylinders.

What is the difference between energy and inertia?

Introduction to the Automobile

Automotive Careers and Technician Certification

Shop Safety

Shop Management, Service Records, and Parts

Locating Service Information and Specifications

Measuring Tools and Systems

Hardware, Fasteners, Drills, and Thread Repair

Shop Tools

General Shop Equipment

Cleaning Equipment and Methods

Lifting Equipment and Air Compressors

Engine Lubrication

Underhood and Body Inspection Car on Ground

Undercar Inspection and Service

Introduction to the Engine

Engine Classifications and Advanced Transportation Technologies

Engine Upper End

Engine Lower End and Lubrication System Theory

Cooling System Theory

Cooling System Service

Automotive Belts

Automotive Hoses

Automotive Plumbing: Tubing and Pipe

Basic Electrical System Theory and Repairs

Battery Fundamentals

Battery Service

Starting System Fundamentals

Starting System Service

Charging System Fundamentals

Charging System Service

Lighting and Wiring Fundamentals

Lighting and Wiring Service

Safety, Security, Comfort Systems, and Electrical Accessories

Heating and Air Conditioning Fundamentals

Heating and Air Conditioning Service

Ignition System Fundamentals

Ignition System Service

Fuels and Alternative Fuels

Fuel System Fundamentals

Fuel System Service

Intake and Exhaust Systems, Turbochargers and Superchargers

Emission Control System Fundamentals

Emission Control System Service

Electronics and Computer Systems Fundamentals

Electronics and Computer Systems Service

Advanced Emissions and On-Board Diagnostics Odb

Diagnosing Engine Performance Problems

Diagnosing Engine Mechanical Problems

Engine Removal and Disassembly

Engine Sealing, Gaskets, Fastener Torque

Engine Diagnosis and Service: Cylinder Head and Valvetrain

Engine Diagnosis and Service: Block, Crankshaft, Bearings, and Lubrication System

Engine Diagnosis and Service: Piston, Piston Rings, Connecting Rod, Engine Balancing

Ordering Parts, Short and Long Blocks, Engine Assembly

Engine Installation, Break In, and In-Chassis Repairs

Brake Fundamentals

Brakes Service

Anti-Lock Brakes Traction and Stability Control

Bearings, Seals, and Greases