ATEC 23 Final Study Guide

Ultra-low-sulfur diesel fuel has how much sulfur content?

A. 15 PPM

A typical oil pump can pump how many gallons per minute?

A. 3 to 6 gallons

For the best working position, the work should be?

A. At neck or head level

Which act or organization regulates air-conditioning refrigerant?

A. Clean Air Act (CAA)

What type of screwdriver should be used if there is very limited space above the head of the fastener? (CH 1 End)

A. Dead-blow hammer

An engine fails to reach normal operating temperature. Which is the most likely fault?

A. Defective thermostat

Used engine oil should be disposed of by all except one of the following methods.

A. Disposed of in regular trash

The diesel injection pump is usually driven by a?

A. Gear off the camshaft

Which method of blending ethanol with gasoline is the most accurate?

A. In-line

Which diesel injection system requires the use of a glow plug?

A. Indirect injection

How is diesel fuel ignited in a warm diesel engine?

A. Indirect injection (IDI)

Avoid topping off the fuel tank because

A. It can saturate the charcoal canister.

The proper term for Vice Grip is?

A. Locking pliers

Which alcohol is dangerous (toxic)?

A. Methanol

What type of screwdriver should be used if there is very limited space above the head of the fastener?

A. Offset screwdriver

What type of pump is a typical oil pump?

A. Positive displacement

Torque is expressed in units of?

A. Pound feet

What color is diesel fuel dyed if it is for off-road use only? (CH 7 Begin)

A. Red

Wetted asbestos dust is considered to be?

A. Solid waste

Technician A says that a crankshaft determines the stroke of an engine. Technician B says that the length of the connecting rod determines the stroke of an engine. Which technician is correct? (CH 3 End)

A. Technician A only

As the percentage of antifreeze in the coolant increases?

A. The freeze point decreases (up to a point)

When refueling a CNG vehicle, why is it recommended that the tank be filled to a high pressure?

A. The range of the vehicle is increased

Using ethanol-enhanced or reformulated gasoline can result in reduced fuel economy? (CH 5 End)

A. True

The upper portion of a two-part intake manifold is often called the_______.

C. Plenum

The oil pump pressure relief valve is also called

C. Pressure regulating valve

Liquefied petroleum gas (LPG) is also called?

C. Propane

Which statement is true about thermostats?

C. The temperature marked on the thermostat is the temperature at which the thermostat should start to open.

In typical engine lubrication systems, what components are the last to receive oil? (CH 9 End)

C. Valve train components

Hazardous materials include all of the following except? (CH 2 Begin)

C. Water

Why are the EGR gases cooled before entering the engine on some engines?

Cool exhaust gas is more effective at controlling NOX emissions

An oil filter should be hot drained for how long before disposing of the filter?

D. 12 Hours

The oil pressure warning light normally comes on to warn the driver if the oil pressure drops below.

D. 3 to 7 PS

One cylinder of an automotive four-stroke-cycle engine completes a cycle every ?

D. 720

What part should be removed to test cylinder compression on a diesel engine? (CH 4 End)

D. A glow plug

The correct location for the pads when hoisting or jacking the vehicle can often be found in the? (CH 1 Begin)

D. All of the above Service manual Owner's manual Shop manual

Diesel fuel additives are designed to?

D. All of the above Improve cetane rating Kill microbes Reduce cold filter plugging point (CFPP)

A stuck open thermostat can cause?

D. All of the above Lower fuel economy Increased exhaust emissions Failure of a state emission test

Methanol is also called?

D. All of the above Methyl alcohol Wood alcohol Methyl hydrate

Winter-blend gasoline? (CH 5 Begin)

D. All of the above Vaporizes more easily than summer-blend gasoline Has a higher RVP Can cause engine driveability problems if used during warm weather

What automotive devices may contain mercury? (CH 2 End)

D. All of the above Rear seat video displays Navigation displays HID headlights

Exposure to asbestos dust can cause what condition?

D. All of the above are Asbestosis Mesothelioma Lung cancer

A flex-fuel vehicle can be identified by?

D. Any of the above Emblems on the side, front, and/or rear of the vehicle VECI VIN

Ethanol can be produced from what products? (CH 6 Begin)

D. Any of the above Switchgrass Sugarcane Corn

Most manufacturers of vehicles equipped with diesel engines allow what type of biodiesel?

D. B5

The intake manifold of a port fuel-injected engine________.

D. Contains only air

To determine if a product or substance being used is hazardous, consult?

D. EPA Guidelines

Used coolant should be?

D. Either b or c Recycled Disposed of properly

Permanent antifreeze is mostly (CH 8 Begin)

D. Ethylene glycol

The proper term for channel locks is?

D. Multi-groove adjustable pilers

Air filters can remove particles and dirt as small as___.

B. 10 to 25 microns

Normal oil pump pressure in an engine is____PSI. (CH 9 Begin)

B. 10 to 60 PSI

How much compressed natural gas (CNG) does it require to achieve the energy of one gallon of gasoline?

B. 122 cubic feet

A normally aspirated automobile engine loses about _____power per 1,000 feet of altitude.

B. 3%

Intake charge velocity has to be___to prevent fuel droplet separation. (CH 10 Begin)

B. 50 feet per second

B20 biodiesel has how much regular diesel fuel?

B. 80%

E85 means that the fuel is made from?

B. 85% ethanol, 15% Gasoline

The weep hole on a water pump is located where?

B. Between the seal and the bearing

E-diesel is diesel fuel with what additive?

B. Ethanol

A water pump is a positive displacement-type pump?

B. False

Biodiesel is regular diesel fuel with vegetable oil added.

B. False

Producing liquid fuel from coal or natural gas usually uses which process? ( CH 6 End)

B. Fischer-Tropsch

What grade is most diesel fuel?

B. Grade #2

All overhead valve engines (CH 3 Begin)

B. Have the overhead valves in the head

How is diesel fuel ignited in a warm diesel engine? (CH 4 Begin)

B. Heat of compression

To avoid problems with the variation of gasoline, all government testing use____________as a fuel during testing procedures

B. Indolene

A high-strength bolt is identified by?

B. Lines on the head

Engine oil passages in an engine block are called

B. Oil galleries

Which is the most widely used alternative fuel?

B. Propane

When working with hand tools, always?

B. Pull a wrench - don't push a wrench

Gasoline should be stored in approved containers that include what color(s)?

B. Red Container

A fastener that uses threads on both ends is called a?

B. Stud

Technician A says that many engines use a windage tray in the oil pan. Technician B says that some engines are equipped with an oil cooler. Which technician is correct?

B. Technician B only

Technician A says that oil pressure is affected by the amount of main and rod bearing clearance. Technician B says that the oil pressure is lower when the oil gets hot than when it is cold. Which technician is correct?

B. Technician B only

Two technicians are discussing torque wrenches. Technician A says that a torque wrench is capable of tightening a fastener with more torque than a conventional breaker bar or ratchet. Technician B says that a torque wrench should be calibrated regularly for the most accurate results. Which technician is correct?

B. Technician B only

The coolant flow through the radiator is controlled by the?

B. Thermostat

A rotating force is called?

B. Torque

How many camshafts does a SOHC V-8 engine have?

B. Two

Glow plugs should have high resistance __________ when and lower resistance when_________?

B. Warm/cold

What color is diesel fuel dyed if it is for off-road use only?

B. Wax

Which diesel system supplies high-pressure diesel fuel to all of the injectors all of the time?

C. High-pressure common rail

The three phases of diesel ignition include?

C. Ignition delay,rapid combustion, controlled combustion

The normal operating temperature(coolant temperature) of an engine equipped with a 195°F thermostat is? (CH 8 End)

C. 195 F to 215 F

Exhaust passages are included in some intake manifolds. Technician A says that the exhaust passages are used for exhaust gas recirculation (EGR) systems. Technician B says that the exhaust heat is used to warm the intake charge on some engines equipped with a throttle-body-type fuel- injection system. Which technician is correct?

C. Both Technicians A and B

Technician A says that a cracked exhaust manifold can affect engine operation. Technician B says that a leaking lower intake manifold gasket could cause a vacuum leak. Which technician is correct?

C. Both Technicians A and B

Technician A says that some intake manifolds are plastic. Technician B says that some intake manifolds are constructed in two parts or sections: upper and lower. Which technician is correct? (CH 10 End)

C. Both Technicians A and B

Technician A says that the oil pump draws unfiltered oil from the bottom of the oil pan. Technician B says that the oil pump is driven from the front of the crankshaft in some engines. Which technician is correct?

C. Both Technicians A and B

Technician A says that a bleeder valve is located on many engines to allow air to escape when refilling the cooling sys- tem. Technician B says that a hose should be attached to the bleeder valve to allow any escaping coolant to be directed to a suitable container. Which technician is correct?

C. Both technicians A and B

Technician A says that in going to high altitudes, engines produce lower power. Technician B says that most engine control systems can compensate the air-fuel mixture for changes in altitude. Which technician is correct?

C. Both technicians A and B

Technician A says that spark knock, ping, and detonation are different names for abnormal combustion. Technician B says that any abnormal combustion raises the temperature and pressure inside the combustion chamber and can cause severe engine damage. Which technician is correct?

C. Both technicians A and B

Technician A says that the research octane number is higher than the motor octane number. Technician B says that the octane rating posted on fuel pumps is an average of the two ratings. Which technician is correct?

C. Both technicians A and B

What rating of diesel fuel indicates how well a diesel engine will start?

C. Cetane rating

All of the following are the proper ways to dispose of a drained oil filter except?

C. Disposed of in regular trash

Vapor lock can occur?

C. During both a and b As a result of excessive heat near fuel lines If a fuel line is restricted

Horsepower is expressed in units of?

C. Foot pounds per minute

Technician A says that glow plugs are used to help start a diesel engine and are shut off as soon as the engine starts. Technician B says that the glow plugs are turned off as soon as a flame is detected in the combustion chamber. Which technician is correct?

D. Neither Technician A or B

How many rotations of the crankshaft are required to complete each stroke of a four-stroke cycle engine?

D. One-Half

Why do many port fuel-injected engines use long intake manifold runners?

D. To increase low-RPM torque

What can be used to measure the alcohol content in gasoline?

D. either a or b graduated cylinder electronic tester

What fuel system component is used in a vehicle equipped with a diesel engine that is not usually used on the same vehicle when it is equipped with a gasoline engine?

D. water-fuel separator

A heated air intake system is usually necessary for proper cold-engine drivability on____.

Throttle-body fuel-injection systems