Trades and Apprenticeship

Coolant is water and _. (Multiple Choice)

Coolant is water and _. (Multiple Choice)

Coolant is water and _.
A) Glycerin      B) Methanol      C) Kerosene      D) Ethylene glycol

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motorhead

Adding a chemical to make ethylene glycol bitter to the taste is called ________.

Adding a chemical to make ethylene glycol bitter to the taste is called ________.

Adding a chemical to make ethylene glycol bitter to the taste is called ________.
A) Refractometer      B) Embittered      C) Passivation      D) Electrolysis

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motorhead

PHOAT coolant is what color?

PHOAT coolant is what color?

PHOAT coolant is what color?
A) Orange      B) Dark Green      C) Blue      D) Red

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motorhead

Two technicians are discussing testing coolant for proper pH. Technician A says that coolant has a p

Two technicians are discussing testing coolant for proper pH. Technician A says that coolant has a p

Two technicians are discussing testing coolant for proper pH. Technician A says that coolant has a pH above 7 when new and becomes lower with use in an engine. Technician B says that OAT and HOAT coolants have a lower pH when new compared to the old

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motorhead

A voltmeter was used to check the coolant and a reading of 0.2 volt with the engine off was measured

A voltmeter was used to check the coolant and a reading of 0.2 volt with the engine off was measured

A voltmeter was used to check the coolant and a reading of 0.2 volt with the engine off was measured. A reading of 0.8 volt was measured with the engine running and all electrical accessories turned on. Technician A says that the coolant should be fl

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motorhead

A normal reading when testing for electrolysis in the coolant is ________.

A normal reading when testing for electrolysis in the coolant is ________.

A normal reading when testing for electrolysis in the coolant is ________.
A) Less than 300 mV      B) More than .5 V      C) At least .5 V      D) 5 V or more

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motorhead

The normal operating temperature (coolant temperature) of an engine equipped with a 195°F thermostat

The normal operating temperature (coolant temperature) of an engine equipped with a 195°F thermostat

The normal operating temperature (coolant temperature) of an engine equipped with a 195°F thermostat is ________.
A) 175°F to 215°F      B) 195°F to 215°F      C) 185°F to 205°F      D) 175°F to 195°F

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motorhead

Technician A says that the cooling system should be tested for leaks using a pressure-operated press

Technician A says that the cooling system should be tested for leaks using a pressure-operated press

Technician A says that the cooling system should be tested for leaks using a pressure-operated pressure pump. Technician B says that the freezing and boiling point of the coolant can be tested using a thermometer. Who is right?
A) Technician A&n

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motorhead

Technician A says that the automotive water pump is a positive displacement-type pump. Technician B

Technician A says that the automotive water pump is a positive displacement-type pump. Technician B

Technician A says that the automotive water pump is a positive displacement-type pump. Technician B says that the coolant mix should be a 50/50 split between antifreeze and water. Who is right?
A) Technician A      B) Technician B

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motorhead

If a cooling system operates at too cool of a temperature, the engine will ________.

If a cooling system operates at too cool of a temperature, the engine will ________.

If a cooling system operates at too cool of a temperature, the engine will ________.
A) Pre-ignite or detonate      B) Produce more torque
C) Produce higher emissions      D) Have more efficiency

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motorhead

Electric cooling fans are typically commanded on and off by the ________.

Electric cooling fans are typically commanded on and off by the ________.

Electric cooling fans are typically commanded on and off by the ________.
A) Radiator pressure sensor (RPS)      B) Cooling system delta sensor
C) Thermostat      D) Powertrain control module (PCM)

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motorhead

The use of a coolant recovery machine is helpful in preventing ________ from entering the cooling sy

The use of a coolant recovery machine is helpful in preventing ________ from entering the cooling sy

The use of a coolant recovery machine is helpful in preventing ________ from entering the cooling system.
A) Hose residue      B) Oil      C) Excessive vibrations      D) Air

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motorhead

For every one PSI increase in cooling system pressure, the coolant's boiling point is raised how man

For every one PSI increase in cooling system pressure, the coolant's boiling point is raised how man

For every one PSI increase in cooling system pressure, the coolant's boiling point is raised how many degrees F?
A) Three      B) One      C) Two      D) Five

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motorhead

The "W" in SAE 5W-20 means ________.

The "W" in SAE 5W-20 means ________.

The "W" in SAE 5W-20 means ________.
A) Winter      B) With      C) Weight      D) Without

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motorhead

Two technicians are discussing oil filters. Technician A says that the oil will remain perfectly cle

Two technicians are discussing oil filters. Technician A says that the oil will remain perfectly cle

Two technicians are discussing oil filters. Technician A says that the oil will remain perfectly clean if just the oil filter is changed regularly. Technician B says that oil filters can filter particles smaller than the human eye can see. Which tech

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motorhead

Which of these oils contains no detergents or additives and is NOT suitable for use in engines?

Which of these oils contains no detergents or additives and is NOT suitable for use in engines?

Which of these oils contains no detergents or additives and is NOT suitable for use in engines?
A) SG      B) SA      C) SM      D) None of these

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motorhead

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

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

A typical oil pump can pump how many gallons per minute?
A) 6 to 10 gallons      B) 10 to 60 gallons      C) 50 to 100 gallons      D) 3 to 6 gallons

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motorhead

Hydrodynamic lubrication, created by the wedging action of oil between the crankshaft journal and be

Hydrodynamic lubrication, created by the wedging action of oil between the crankshaft journal and be

Hydrodynamic lubrication, created by the wedging action of oil between the crankshaft journal and bearing, can be as high as ________ PSI.
A) 120      B) 1000      C) 500      D) 60

motorhead   662   2 Replies

motorhead

Lower than specified oil pressure is measured on a high mileage engine. Technician A says that worn

Lower than specified oil pressure is measured on a high mileage engine. Technician A says that worn

Lower than specified oil pressure is measured on a high mileage engine. Technician A says that worn main or rod bearings could be the cause. Technician B says that a clogged oil pump pickup screen could be the cause. Which technician is correct?

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motorhead

Engine oil passages in an engine block are called ________,

Engine oil passages in an engine block are called ________,

Engine oil passages in an engine block are called ________,
A) Runners      B) Galleries      C) Holes      D) Pathways

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motorhead

Technician A says that oil pressure is normally higher when the engine is cold. Technician B says th

Technician A says that oil pressure is normally higher when the engine is cold. Technician B says th

Technician A says that oil pressure is normally higher when the engine is cold. Technician B says that normal engine oil pump pressure ranges from 20 to 80 psi (200 to 400 kPa) or 20 psi for every 1000 engine RPM. Who is right?
A) Technician A&n

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motorhead

The air/fuel mixture flows through the intake manifold on what type of system?

The air/fuel mixture flows through the intake manifold on what type of system?

The air/fuel mixture flows through the intake manifold on what type of system?
A) Port fuel injection      B) Any fuel injected engine
C) Both port injection and throttle body injection      D) Throttle body fu

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motorhead

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

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

Why do many port fuel injected engines use long intake runners?
A) To increase low RPM torque      B) To reduce exhaust emissions
C) To heat the incoming air      D) To increase high RPM power

motorhead   804   2 Replies

motorhead

Technician A says that a cracked exhaust manifold can affect engine operation. Technician B says tha

Technician A says that a cracked exhaust manifold can affect engine operation. Technician B says tha

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?
A) Technician A only      B) Tech

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motorhead

The intake manifold of a port fuel-injected engine does which of these?

The intake manifold of a port fuel-injected engine does which of these?

The intake manifold of a port fuel-injected engine does which of these?
A) Uses a heater to heat the intake air       B) Uses a leaner air-fuel mixture than TBI
C) Contains only air      D) Contains only fuel

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motorhead

Some systems also have a ________ sensor between the throttle body and the air cleaner.

Some systems also have a ________ sensor between the throttle body and the air cleaner.

Some systems also have a ________ sensor between the throttle body and the air cleaner.
A) Throttle position sensor (TPS)      B) Exhaust gas sensor (EGS)
C) Mass airflow (MAF)      D) Air temperature

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motorhead

How are most turbochargers lubricated?

How are most turbochargers lubricated?

How are most turbochargers lubricated?
A) By an internal oil reservoir
B) By greased bearings
C) By engine oil under pressure through lines from the engine
D) No lubrication is needed because the incoming air cools the turbocharge

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motorhead

What is the purpose an intercooler?

What is the purpose an intercooler?

What is the purpose an intercooler?
A) To cool the exhaust before it enters the turbocharger      B) To cool the engine oil on a turbocharged engine
C) To reduce the temperature of the air entering engine     

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motorhead

Technician A says that volumetric efficiency is a comparison of the actual volume of air-fuel mixtur

Technician A says that volumetric efficiency is a comparison of the actual volume of air-fuel mixtur

Technician A says that volumetric efficiency is a comparison of the actual volume of air-fuel mixture drawn into the engine to the theoretical minimum volume that can be drawn into the cylinder. Technician B says that a supercharger consumes some eng

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motorhead

All of these are advantages of supercharging an engine, EXCEPT ________.

All of these are advantages of supercharging an engine, EXCEPT ________.

All of these are advantages of supercharging an engine, EXCEPT ________.
A) Increases the air-fuel charge density
B) Pumped air pushes the remaining exhaust from the combustion
C) Lowers the temperature of the cylinder head, pistons, a

motorhead   278   2 Replies

motorhead

Technician A says that a bypass valve is used to control the boost pressure on most factory installe

Technician A says that a bypass valve is used to control the boost pressure on most factory installe

Technician A says that a bypass valve is used to control the boost pressure on most factory installed superchargers. Technician B says that an intercooler is used on many turbocharged and some supercharged engines to reduce the temperature of air ent

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motorhead

Which of these is defined as the mass or weight of a substance in a given amount of space?

Which of these is defined as the mass or weight of a substance in a given amount of space?

Which of these is defined as the mass or weight of a substance in a given amount of space?
A) Energy      B) Volumetric efficiency
C) Density      D) Mass

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motorhead

When air is pumped into the cylinder, the combustion chamber receives an increase of air pressure kn

When air is pumped into the cylinder, the combustion chamber receives an increase of air pressure kn

When air is pumped into the cylinder, the combustion chamber receives an increase of air pressure known as ________ and is measured in pounds per square inch (psi), atmospheres (ATM), or bar.
A) Boost      B) Density   

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motorhead

Many factory installed superchargers are equipped with a ________ that allows intake air to flow dir

Many factory installed superchargers are equipped with a ________ that allows intake air to flow dir

Many factory installed superchargers are equipped with a ________ that allows intake air to flow directly into the intake manifold bypassing the supercharger.
A) Throttle control valve      B) Bypass valve
C) Control valve&n

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motorhead

Nitrous oxide injection adds ________ allowing the engine to burn more fuel.

Nitrous oxide injection adds ________ allowing the engine to burn more fuel.

Nitrous oxide injection adds ________ allowing the engine to burn more fuel.
A) HC      B) Oxygen      C) CO2      D) NOx

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motorhead

Which of the following is the LEAST LIKELY to cause an engine noise?

Which of the following is the LEAST LIKELY to cause an engine noise?

Which of the following is the LEAST LIKELY to cause an engine noise?
A) Vacuum leak      B) Carbon on the pistons
C) Loose accessory drive belt      D) Cracked exhaust manifold

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motorhead

A good engine should produce how much compression during a running (dynamic) compression test at idl

A good engine should produce how much compression during a running (dynamic) compression test at idl

A good engine should produce how much compression during a running (dynamic) compression test at idle?
A) 30-60 PSI      B) 60-90 PSI      C) 150-200 PSI      D) 100-150 PSI

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motorhead

Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technicia

Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technicia

Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technician B says that a leaking head gasket can be found using an exhaust gas analyzer. Who is correct?
A) Technician A      B) Technician

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motorhead

The low oil pressure warning light usually comes on ________.

The low oil pressure warning light usually comes on ________.

The low oil pressure warning light usually comes on ________.
A) When the oil filter anti-drain back valve opens
B) When oil pressure drops dangerously low (4 to 7 psi)
C) When an oil change is required
D) When the oil filter byp

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motorhead

A thermostat can fail in which way?

A thermostat can fail in which way?

A thermostat can fail in which way?
A) Stuck closed      B) Stuck partially open      C) Stuck open      D) Any of the above

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motorhead