Question 1

Heavy-duty engines and some vintage automotive engines use replaceable cylinder bores, called wet or dry ____________________.

Accepted Answer

sleeves

Question 2

While discussing vibration dampers, Technician A says that four-cylinder engines usually have a pulley and a damper. Technician B says that four-cylinder engines usually have only a pulley and do not use a damper. 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 B

Question 3

Compression rings are forced against the cylinder wall by combustion pressure at the top and back of the ring. What is the purpose of the second ring?

Accepted Answer

The second ring operates under considerably less pressure than the top ring: 35,000 psi at 300F. It captures the little amount of pressure that escapes past the top ring and also scrapes any oil that leaks upward beyond the oil ring back down the cylinder for a second chance at oil control.

Question 4

All of the following statements are true EXCEPT:

Accepted Answer

A) copper-lined bearings are premium bearings. 
B) some bearings are made of solid aluminum alloy. 
C) multilayered bearings have steel backs with one or more layers of lining material. 
D) dissimilar metals slide against each other with greater friction than similar metals. 
A) copper-lined bearings are premium bearings. 
B) some bearings are made of solid aluminum alloy. 
C) multilayered bearings have steel backs with one or more layers of lining material. 
D) dissimilar metals slide against each other with greater friction than similar metals.

Question 5

The bearing surface has three primary properties that make it suitable for use in an engine: embeddability, conformability, and fatigue strength. Provide definitions for each of these properties.

Accepted Answer

Embeddability is a bearing property that

Question 6

All of the following statements are true EXCEPT:

Accepted Answer

A) nearly all engines are left-hand engines. 
B) when viewing the piston from the right-hand side, the piston pin will be offset to the left side of the piston. 
C) a left-hand engine is one that turns counterclockwise when viewing the engine from the flywheel side. 
D) when a left-hand engine has oil squirt holes on the connecting rods, the holes are to the right when the piston notches are facing forward. 
A) nearly all engines are left-hand engines. 
B) when viewing the piston from the right-hand side, the piston pin will be offset to the left side of the piston. 
C) a left-hand engine is one that turns counterclockwise when viewing the engine from the flywheel side. 
D) when a left-hand engine has oil squirt holes on the connecting rods, the holes are to the right when the piston notches are facing forward.

Question 7

Briefly discuss the three sources that subject bearings to normal loads.

Accepted Answer

Bearings are subjected to normal loads f

Question 8

Main caps are not interchangeable and must be returned to the same bearing bores from which they were removed.

Accepted Answer

A) True 
 B)False

Question 9

An aluminum piston expands at about twice the rate of the cast-iron block. What can be done to control this expansion?

Accepted Answer

Most piston skirts are tapered. They are

Question 10

While discussing bearing undersizes, Technician A says that undersized bearings are used when a crankshaft is reground. Technician B says that they are used on some new engines to compensate for errors in production. 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 11

Which of the following statements is LEAST-Likely true?

Accepted Answer

A) Friction occurs between the piston rings and cylinder walls. 
B) Low-tension piston rings were introduced in the mid-1980s to improve fuel economy. 
C) Compression rings account for about 60% of the total drag on a cylinder wall, and the oil ring accounts for 20%. 
D) Cast iron rings are used in re-ring jobs when the cylinder walls have not been re-bored. 
A) Friction occurs between the piston rings and cylinder walls. 
B) Low-tension piston rings were introduced in the mid-1980s to improve fuel economy. 
C) Compression rings account for about 60% of the total drag on a cylinder wall, and the oil ring accounts for 20%. 
D) Cast iron rings are used in re-ring jobs when the cylinder walls have not been re-bored.

Question 12

The top piston ring is positioned as high as possible on the piston to increase piston slap, help ring durability, and lower emissions.

Accepted Answer

A) True 
 B)False

Question 13

The top of a cylinder receives less lubrication, and it is subjected to the high pressure of the piston rings against the cylinder wall as the air-fuel mixture is ignited. This can result in ____________________ wear.

Accepted Answer

The answer of The top of a cylinder receives less...

Question 14

The part that will MOST-Likely be used to prevent the piston pin from sliding out and damaging the cylinder wall is the:

Accepted Answer

A) wrist pin 
B) piston ring 
C) compression ring 
D) lock ring 
A) wrist pin 
B) piston ring 
C) compression ring 
D) lock ring

Question 15

Bearing spread promotes better heat transfer and prevents the bearing from spinning in the bore.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is LEAST-Likely true?

Accepted Answer

A) Engine intake manifold vacuum during deceleration increases with compression ratio. 
B) Oil consumption decreases with engine speed. 
C) An engine that uses a single drop of oil with every power stroke would use 1 quart of oil every 2 miles. 
D) Actual oil consumption per power stroke in an average engine is from 1/1000 to 2/1000 of a drop. 
A) Engine intake manifold vacuum during deceleration increases with compression ratio. 
B) Oil consumption decreases with engine speed. 
C) An engine that uses a single drop of oil with every power stroke would use 1 quart of oil every 2 miles. 
D) Actual oil consumption per power stroke in an average engine is from 1/1000 to 2/1000 of a drop.

Question 17

Inline engines often have each rod lubricate its own cylinder.

Accepted Answer

A) True 
 B)False

Question 18

Journals that are offset from the main bearing journal centerline are called ____________________.

Accepted Answer

rod journa

Question 19

The crankshaft assembly, the piston, and the rod are collectively referred to as the ____________________.

Accepted Answer

The answer of The crankshaft assembly, the piston, and the...

Question 20

To test a moly or chrome ring to see if it is ductile iron, simply twist it. If it is regular iron, it will break in two.

Accepted Answer

A) True 
 B)False

Exam 19: Engine Lower End and Lubrication System Theory

Heavy-duty engines and some vintage automotive engines use replaceable cylinder bores, called wet or dry ____________________.

While discussing vibration dampers, Technician A says that four-cylinder engines usually have a pulley and a damper. Technician B says that four-cylinder engines usually have only a pulley and do not use a damper. Who is correct?

Compression rings are forced against the cylinder wall by combustion pressure at the top and back of the ring. What is the purpose of the second ring?

All of the following statements are true EXCEPT:

The bearing surface has three primary properties that make it suitable for use in an engine: embeddability, conformability, and fatigue strength. Provide definitions for each of these properties.

All of the following statements are true EXCEPT:

Briefly discuss the three sources that subject bearings to normal loads.

Main caps are not interchangeable and must be returned to the same bearing bores from which they were removed.

An aluminum piston expands at about twice the rate of the cast-iron block. What can be done to control this expansion?

While discussing bearing undersizes, Technician A says that undersized bearings are used when a crankshaft is reground. Technician B says that they are used on some new engines to compensate for errors in production. Who is correct?

Which of the following statements is LEAST-Likely true?

The top piston ring is positioned as high as possible on the piston to increase piston slap, help ring durability, and lower emissions.

The top of a cylinder receives less lubrication, and it is subjected to the high pressure of the piston rings against the cylinder wall as the air-fuel mixture is ignited. This can result in ____________________ wear.

The part that will MOST-Likely be used to prevent the piston pin from sliding out and damaging the cylinder wall is the:

Bearing spread promotes better heat transfer and prevents the bearing from spinning in the bore.

Which of the following is LEAST-Likely true?

Inline engines often have each rod lubricate its own cylinder.

Journals that are offset from the main bearing journal centerline are called ____________________.

The crankshaft assembly, the piston, and the rod are collectively referred to as the ____________________.

To test a moly or chrome ring to see if it is ductile iron, simply twist it. If it is regular iron, it will break in two.

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 Vehicle on Ground

Undercar Inspection and Service

Introduction to the Engine

Engine Classifications and Types

Engine Size and Measurements

Engine Upper End

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

Petroleum Fuels and Alternative Fuel Technologies

Fuel System Fundamentals, Gasoline and Diesel

Fuel System Service

Intake and Exhaust Systemsturbochargers and Superchargers

Emission Control System Fundamentals, Gasoline and Diesel

Emission Control System Service

Electronics and Computer Systems Fundamentals

Electronics and Computer Systems Service

Advanced Emission and On-Board Diagnostics Obd

Diagnosing Engine Performance Problems

Diagnosing Engine Mechanical Problems

Engine Removal and Disassembly

Engine Sealing Gaskets, Fastener Torque

Engine Diagnosis and Service: Cylinder Head and Valve Train

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

Brake Service

Antilock Brakes, Traction, and Stability Control

Bearings, Seals, and Greases