Question 1

A glitch is when the car stumbles when first accelerated.

Accepted Answer

A) True 
 B)False  False

Question 2

If there are three or four wires coming from the sensor, it is a(n) ____ sensor.

Accepted Answer

A)  O2 
B)  heated 
C)  throttle position 
D)  oxygen 
A)  O2 
B)  heated 
C)  throttle position 
D)  oxygen B

Question 3

The exhaust stream from a running engine can be tested using an infrared exhaust analyzer.

Accepted Answer

A) True 
 B)False  True

Question 4

The sensor that measures the temperature of incoming air is called a(n) ____ sensor.

Accepted Answer

A)  air charge temperature 
B)  O2 
C)  throttle position 
D)  idle speed 
A)  air charge temperature 
B)  O2 
C)  throttle position 
D)  idle speed

Question 5

It is sometimes necessary to lower or remove a fuel tank from a car when the tank is corroded or at what other times?

Accepted Answer

When you need to: 
- Replace f

Question 6

Driving at 55 mph into a slight wind will MOST-Likely cause an engine to run with:

Accepted Answer

A)  5" of intake manifold vacuum 
B)  10" of intake manifold vacuum 
C)  15" of intake manifold vacuum 
D)  20" of intake manifold vacuum 
A)  5" of intake manifold vacuum 
B)  10" of intake manifold vacuum 
C)  15" of intake manifold vacuum 
D)  20" of intake manifold vacuum

Question 7

Describe one way to bleed pressure from a fuel system.

Accepted Answer

The following is a very simple procedure

Question 8

What precautions should you take when servicing continuous injectors?

Accepted Answer

1. There is a danger of fire from spille

Question 9

Which of the following is LEAST-Likely one of the common adjustments made to EFI systems?

Accepted Answer

A)  Idle speed 
B)  ISC motor pintle 
C)  Idle air control 
D)  Idle fuel filter 
A)  Idle speed 
B)  ISC motor pintle 
C)  Idle air control 
D)  Idle fuel filter

Question 10

There are codes for many malfunctions that the computer can diagnose. The easy way to read these codes is to use a(n) ____________________, a hand-held diagnostic tool.

Accepted Answer

The answer of There are codes for many malfunctions that...

Question 11

Computer fuel injection systems use ____________________ trim to continually adjust the air-fuel ratio in response to both immediate (short-term) and long-term conditions.

Accepted Answer

The answer of Computer fuel injection systems use ____________________ trim...

Question 12

How would you use a carbon blaster to remove carbon deposits?

Accepted Answer

1. The intake manifold is removed. 
2. T

Question 13

Testing pressure in one type of throttle-body fuel injection requires that the line entering the throttle body be disconnected.

Accepted Answer

A) True 
 B)False

Question 14

All of the following statements are true EXCEPT:

Accepted Answer

A)  fumes from some types of silicone RTV sealants used on the engine can contaminate O2 sensors. 
B)  lead in fuel can contaminate an O2 sensor. 
C)  if the pores of an O2 sensor become plugged, its response time and output voltage will increase. 
D)  carbon buildup on an O2 sensor can be from an overly rich air-fuel mixture, engine oil consumption, or a bad turbocharger turbine seal. 
A)  fumes from some types of silicone RTV sealants used on the engine can contaminate O2 sensors. 
B)  lead in fuel can contaminate an O2 sensor. 
C)  if the pores of an O2 sensor become plugged, its response time and output voltage will increase. 
D)  carbon buildup on an O2 sensor can be from an overly rich air-fuel mixture, engine oil consumption, or a bad turbocharger turbine seal.

Question 15

If the fuel filter becomes plugged in a fuel injection system, fuel to the rail will increase, which results in hard starting, lean running conditions, and lack of power.

Accepted Answer

A) True 
 B)False

Question 16

While having a discussion, Technician A says that an unfortunate result of a restricted filter is that the fuel pump will draw more electrical current. Technician B says that the result of a restricted filter can be hard on the fuel pump brushes and can result in premature failure of the pump. 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 17

All of the following statements are true EXCEPT:

Accepted Answer

A)  a pressure regulator can become defective due to foreign material or a ruined diaphragm. 
B)  high pressure is usually caused by a bad pressure regulator or on looped systems when a pressure return line to the fuel tank is kinked. 
C)  if gasoline drips from the vacuum hose when it is removed from a fuel pressure regulator, it is defective. 
D)  fuel pressure regulators usually fail by causing pressure that is too high rather than too low. 
A)  a pressure regulator can become defective due to foreign material or a ruined diaphragm. 
B)  high pressure is usually caused by a bad pressure regulator or on looped systems when a pressure return line to the fuel tank is kinked. 
C)  if gasoline drips from the vacuum hose when it is removed from a fuel pressure regulator, it is defective. 
D)  fuel pressure regulators usually fail by causing pressure that is too high rather than too low.

Question 18

What precautions should you take when bleeding pressure from a fuel system?

Accepted Answer

1. Before removing a fuel tank, remove t

Question 19

____________________ occurs when an engine gets too much fuel.

Accepted Answer

The answer of ____________________ occurs when an engine gets too...

Question 20

The tool that MOST-Likely uses crushed walnut shells blasted by compressed air to remove carbon deposits is:

Accepted Answer

A)  scan tool 
B)  plenum 
C)  carbon blaster 
D)  resonator 
A)  scan tool 
B)  plenum 
C)  carbon blaster 
D)  resonator

Exam 41: Fuel System Service

A glitch is when the car stumbles when first accelerated.

If there are three or four wires coming from the sensor, it is a(n) ____ sensor.

The exhaust stream from a running engine can be tested using an infrared exhaust analyzer.

The sensor that measures the temperature of incoming air is called a(n) ____ sensor.

It is sometimes necessary to lower or remove a fuel tank from a car when the tank is corroded or at what other times?

Driving at 55 mph into a slight wind will MOST-Likely cause an engine to run with:

Describe one way to bleed pressure from a fuel system.

What precautions should you take when servicing continuous injectors?

Which of the following is LEAST-Likely one of the common adjustments made to EFI systems?

There are codes for many malfunctions that the computer can diagnose. The easy way to read these codes is to use a(n) ____________________, a hand-held diagnostic tool.

Computer fuel injection systems use ____________________ trim to continually adjust the air-fuel ratio in response to both immediate (short-term) and long-term conditions.

How would you use a carbon blaster to remove carbon deposits?

Testing pressure in one type of throttle-body fuel injection requires that the line entering the throttle body be disconnected.

All of the following statements are true EXCEPT:

If the fuel filter becomes plugged in a fuel injection system, fuel to the rail will increase, which results in hard starting, lean running conditions, and lack of power.

All of the following statements are true EXCEPT:

What precautions should you take when bleeding pressure from a fuel system?

____________________ occurs when an engine gets too much fuel.

The tool that MOST-Likely uses crushed walnut shells blasted by compressed air to remove carbon deposits is:

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 Size and Measurements

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

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

Tire and Wheel Theory