Lubricants

Water is not desirable as lubricant by itself because:

it is plentiful and cheap.

it circulates too freely.

it absorbs heat excessively.

it corrodes metal parts.

Correct! Wrong!

By definition, preventive maintenance is:

service that is performed only when necessary.

an organized procedure established by the manufacturer.

the process of changing oil and filter.

the responsibility of the service manager.

Correct! Wrong!

Before draining oil, the engine should be brought to operating temperature so that:

the machine is easier to work on.

all of the fittings will move easily.

you don''t have to warm it up to move it.

the oil will hold contaminants and flow easily.

Correct! Wrong!

The first item to watch for when restarting an engine after an oil change is:

oil level.

oil pressure.

oil leaks.

il analysis.

Correct! Wrong!

In relation to lubricants (transmission and drive axle), what is channeling?

a condition where a lubricant breaks down in high temperatures.

a problem where extreme pressures on components causes a lubricant to separate.

an observation of a liquid seeking the lowest center of gravity in a specified space.

a condition in which components to not get lubricated due to cold temperature, which thicken the lubricants, causing greatly reduced flow.

Correct! Wrong!

The most important consideration that you must make in maintenance is to:

always consult manufacturer''s recommendations.

use the same lubricant for all applications.

only maintain those items that are written on the work order.

keep track of how much time you spend on each machine.

Correct! Wrong!

In order to prevent bearing corrosion, an oil must have:

corrosion inhibitors.

rust inhibitors.

anti-oxidants.

viscosity index improvers.

Correct! Wrong!

When changing a replaceable element filter, you should only change the neoprene gasket once per year.

True.

False.

Correct! Wrong!

To provide good flowing qualities at low temperatures, an oil must have pour point depressants.

True.

False.

Correct! Wrong!

One safety precaution to observe when changing oil is:

filters are tight and require force to remove them.

oil is hot and can cause serious burns.

wrenches can slip and cause injury.

drain plug edges are sharp and can cut you.

Correct! Wrong!

Oil can be flushed through the floor drain as long as it is hot.

True.

False.

Correct! Wrong!

The filter that is removed and replaced as a unit is:

the replaceable element filter.

the spin-on-filter.

the oil bath filter.

the cartridge element filter.

Correct! Wrong!

It is good practice when changing filters to:It is good practice when changing filters to:

always use filters with the same thread size.

always use the same brand of filter.

always check to make sure that it is the correct filter.

always tighten it as far as possible.

Correct! Wrong!

In addition to changing oil and filters and completing all the items on your check lists, it is important that you:

check the RPM limits on the engine.

test drive the unit.

check other safety items.

record date and hours on the work order.

Correct! Wrong!

Automatic transmission fluids designated A, F, Dexron and Dexron II will meet the service ratings for any hydraulic system:

True.

False.

Correct! Wrong!

Greases may contain special additives to provide bulk and to harden the grease. This additive may be:

molybdenum disulfide.

lead naphthenate.

fillers.

talc powder.

Correct! Wrong!

What damage is caused by over-greasing?

scoring.

channeling.

accumulation of grit around greasing points.

blowing out a bearing seal.

Correct! Wrong!

As the oil temperature in the transmission increases:

it raises the oil level.

it lowers the oil level.

there is no change in the oil level.

none of the above.

Correct! Wrong!

If, when lubricating a U-joint, fresh lube can be seen at all bearing seals, this means:

the trunnions are worn and need to be replaced.

the bearing are worn and need to be replaced.

the seals are worn and need to be replaced.

the U-joint has been properly lubed.

Correct! Wrong!

When lubricating the fifth wheel, what type of lube would be recommended?

a water-resistant lithium-based grease.

chassis grease.

EP lithium soap-based grease.

none of the above

Correct! Wrong!

The major result of friction is:

sliding.

rubbing.

heat.

abrasion.

Correct! Wrong!

The resistance between two objects lightly coated with oil or grease is called:

dry friction.

greasy friction.

oily friction.

viscous friction.

Correct! Wrong!

When an oil clings to a shaft and wedges between it and the bearing so that the shaft is supported entirely by the oil, it is called:

greasy friction.

boundary lubrication.

hydrodynamic lubrication.

synthetic lubrication.

Correct! Wrong!

Society of Automotive Engineers establish the ratings for:

oil applications.

oil grades.

oil lubricating qualities.

oil viscosities.

Correct! Wrong!

The American Petroleum Institute classification "CD" indicates:

moderate diesel service.

severe duty diesel service.

Correct! Wrong!

Friction depends on the type of material, the amount of pressure applied and:

the surface finish and the amount of movement.

the type of lubricant and the amount of lubricant.

the method of attachment and the amount of push.

the base lubricant and the type of finish.

Correct! Wrong!

The resistance of a liquid to flowing is called:

intensity.

viscosity.

volatility.

cetane.

Correct! Wrong!

The ability of a gear oil to provide lubrication at the lowest anticipated temperature is called:

pour point.

viscosity index.

channel temperature.

extreme pressure.

Correct! Wrong!

The API classifications for gear oils uses the letter prefix:

EP

SAE

HO

GL

Correct! Wrong!

Grease from a container which has been left open can still be used as long as you remove the contaminated top layer.

True.

False.

Correct! Wrong!

Lubricants

Water is not desirable as lubricant by itself because:

By definition, preventive maintenance is:

Before draining oil, the engine should be brought to operating temperature so that:

The first item to watch for when restarting an engine after an oil change is:

In relation to lubricants (transmission and drive axle), what is channeling?

The most important consideration that you must make in maintenance is to:

In order to prevent bearing corrosion, an oil must have:

When changing a replaceable element filter, you should only change the neoprene gasket once per year.

To provide good flowing qualities at low temperatures, an oil must have pour point depressants.

One safety precaution to observe when changing oil is:

Oil can be flushed through the floor drain as long as it is hot.

The filter that is removed and replaced as a unit is:

It is good practice when changing filters to:It is good practice when changing filters to:

In addition to changing oil and filters and completing all the items on your check lists, it is important that you:

Automatic transmission fluids designated A, F, Dexron and Dexron II will meet the service ratings for any hydraulic system:

Greases may contain special additives to provide bulk and to harden the grease. This additive may be:

What damage is caused by over-greasing?

As the oil temperature in the transmission increases:

If, when lubricating a U-joint, fresh lube can be seen at all bearing seals, this means:

When lubricating the fifth wheel, what type of lube would be recommended?

The major result of friction is:

The resistance between two objects lightly coated with oil or grease is called:

When an oil clings to a shaft and wedges between it and the bearing so that the shaft is supported entirely by the oil, it is called:

Society of Automotive Engineers establish the ratings for:

The American Petroleum Institute classification "CD" indicates:

Friction depends on the type of material, the amount of pressure applied and:

The resistance of a liquid to flowing is called:

The ability of a gear oil to provide lubrication at the lowest anticipated temperature is called:

The API classifications for gear oils uses the letter prefix:

Grease from a container which has been left open can still be used as long as you remove the contaminated top layer.

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Heavy-Duty Mechanic - Trucks & Equipment