(MOVT) Intro: Test 5

The "W" in SAE 5W-20 means ____. A) winter B) weight C) with D) without

A) winter

The purpose of the oil filter bypass valve is to... A) allow oil to bypass the filter if the filter becomes clogged B) keep the oil from draining out of the filter when the engine is shut off C) allows oil to bypass the oil filter when the oil is hot, to help cool the oil D) both B and C

A) allow oil to bypass the filter if the filter becomes clogged

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

A) by engine oil under pressure through lines from the engine

The oil drains back to the oil pan through ____. A) drainback holes B) the camshaft C) the pushrods D) drain pumps

A) drainback holes

A normal reading when testing coolant for galvanic activity is ____. A) less than 200mV B) more than 0.5V C) at least 0.5V D) 5V or more

A) less than 200mV

Many oils are identified by two numbers (i.e. 10W-30). These types of oil are referred to as ____ oils. A) Multi-grade B) semi-grade C) 2-number D) binumeral

A) multi-grade

What service operations is most important on engines equipped with a turbocharger? A) regular oil changes B) replacing the fuel filter regularly C) replacing the air filter regularly D) regular exhaust system maintenance

A) regular oil changes

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 correct? A) tech A B) tech B C) both techs D) neither tech

A) tech A

Technician A says that the purpose and function of the cooling system is to maintain proper engine operating temperature. Technician B says that the water pump controls engine coolant temperature by opening at its rated opening temperature to allow coolant to flow through the radiator. Who is right? A) tech A B) tech B C) both techs D) neither techs

A) tech A

As the percentage of antifreeze in the coolant increases,... A) the freeze point decreases (up to a point) B) the heat transfer increases C) the boiling point decreases D) all of the above occurs

A) the freeze point decreases (up to a point)

The upper radiator hose collapses when the engine cools. What is most likely cause? A) the spring is missing from the upper radiator hose which is used to keep it from collapsing B) a defective pressure cap C) a defective thermostat D) a defective upper radiator hose

B) a defective pressure cap

The use of a coolant recovery machine is helpful in preventing ____ from entering the cooling system. A) oil B) air C) hose residue D) excessive vibrations

B) air

Oil change intervals as specified by the vehicle manufacturer... A) generally only include time between oil changes B) are maximum time and mileage intervals C) only included miles driven between oil changes D) are minimum time and mileage intervals

B) are maximum time and mileage intervals

An engine oil cooler usually uses ____ to cool the oil. A) air conditioning evaporator output B) coolant C) automatic transmission fluid after it flows through the radiator D) air

B) coolant

Oil with a high viscosity has a ____ resistance to flow than oil with a lower viscosity. A) equal B) higher C) lower D) none of these

B) higher

A normal reading when testing for electrolysis in the coolant is ____. A) 5V or more B) less than 300mV C) more than 0.5V D) at least 0.5V

B) less than 300mV

Different brands of oil can be used in a vehicle from one oil change to another if they meet vehicle specifications, because all oil is ____. A) the same API group B) miscible C) of the same viscosity D) both A and C

B) miscible

The upper portion of a two part intake manifold is often called the ____. A) lower part B) plenum C) vacuum chamber D) housing

B) plenum

A customer complains that the heater works sometimes, but sometimes only cold air comes out while driving. Technician A says the water pump is defective. Technician B says that the cooling system could be low on coolant. Who is right? A) tech A B) tech B C) both techs D) neither tech

B) tech B

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 flushed to solve the galvanic activity. Technician B says that the ground wires and connections should be inspected and repaired to solve the electrolysis problem. Which technician is correct? A) tech A B) tech B C) both techs D) neither tech

B) tech B

Technician A says that galvanic activity is the result of a poor ground connection. Technician B says that electrolysis can occur with a poor ground connection. Which technician is correct? A) tech A B) tech B C) both techs D) neither tech

B) tech B

Oil viscosity refers to which of these? A) most important property of lubricating oil B) tendency of oil resist flowing C) tendency of oil to increase flow D) divided into body and fluidity

B) tendency of oil resist flowing

In typical engine lubrication systems, what components are the last to receive oil and the first to suffer from a lack of oil or oil pressure? A) main bearings B) valve train components C) rod bearings D) oil filter

B) valve train components

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 upper intake is often called the plenum. Which technician is correct? A) tech A B) tech B C) both techs D) neither techs

C) both techs

Technician A says that cooling fans are designed to draw air through the radiator to aid in the heat transfer process. Technician B says that drawing the heat from the coolant transfers this heat to the outside air through the radiator. Who is right? A) tech A B) tech B C) both techs D) neither tech

C) both techs

Technician A says that the engine oil used should be meet the vehicle manufacturer's standards. Technician B says that the specified viscosity of oil should be used. Which technician is correct? A) tech A B) tech B C) both techs D) neither techs

C) both techs

Technician A says that the lubricating system forms a seal between the piston rings and cylinder walls. Technician B says the lubricating system helps cool engine parts. Who is right? A) Tech A B) Tech B C) Both Techs D) Neither Techs

C) both techs

Technician A says that the radiator should always be inspected for leaks and proper flow before installing a rebuilt engine. Technician B says that overheating during slow city driving can be caused by a defective electric cooling fan. Who is right? A) Tech A B) Tech B C) Both Techs D) Neither Techs

C) both techs

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 green IAT coolant. Which technician is correct? A) Tech A B) Tech B C) Both Techs D) Neither Techs

C) both techs

Coolant is water and ____. A) kerosene B) glycerin C) ethylene glycol D) methanol

C) ethylene glycol

The oil pressure relief valve controls ____ oil pressure in the lubrication system. A) minimum B) average C) maximum D) nominal

C) maximum

Normal oil pump pressure in an engine is ____ PSI. A) 150-200 B) 100-120 C) 3-7 D) 10-60

D) 10-60

Which mixture of coolant/water solution below is recommended for general automotive use? A) 70/30 B) 100/0 C) 30/70 D) 50/50

D) 50/50

All these are functions of coolant EXCEPT... A) cooling system lubricant B) rust inhibitor C) corrosion inhibitor D) all of these are functions of coolant

D) all of these are functions of coolant

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) waste B) horsepower C) density D) boost

D) boost

Why are the EGR gases cooled before entering the engine on some engines? A) to prevent damage to the intake valves B) to prevent heating the air-fuel mixture in the cylinder C) to help prevent the exhaust from slowing down D) cool exhaust gas is more effective at controlling NOx emissions

D) cool exhaust gas is more effective at controlling NOx emissions

Engine oil passages in an engine block are called ____. A) pathways B) holes C) runners D) galleries

D) galleries

Which statement below best defines the term miscible? A) the lowest temperature at which oil will flow B) the change in viscosity from cold to hot temperatures C) the oil's resistance to flow D) oil can mix with other oils without causing problems

D) oil can mix with other oils without causing problems

Boost pressure is generally measured in ____. A) inches of mercury (in. Hg) B) inch pounds C) inches of water (H2O) D) pounds per square inch (PSI)

D) pounds per square inch (PSI)

The air filter restriction indicator uses what to detect when it signals to replace the filter? A) number of miles or vehicle travel B) the amount of light that can pass through the filter C) number of hours of engine operation D) the amount of restriction measured in inches of water

D) the amount of restriction measured in inches of water

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

D) to reduce the temperature of the air entering engine

In a dry sump system, there is no oil at all in the oil pan. True or False?

False

The oil filter can be thrown in the trash as soon as it is removed from the engine, since it is still warm. True or False?

False

Oil leaving the oil filter is delivered to the oil passages. True or False?

True

Some manufacturers recommend using premixed coolant only in their vehicles. True or False?

True

Using the incorrect multi-grade oil can cause the check engine light to come on. True or False?

True