Unit 6 Exelia

Front 1

Technician A says pistons must be installed in the correct direction on the connecting rod. Technician B says this is because some pistons have a slight offset and others have oil spit holes. Who is correct?

Back 1

Both Technician A and Technician B

Front 2

Install the bearing in the bearing cap, being careful to line up the ____________ with the notch in the cap.

Back 2

bearing tang

Front 3

Most oil filters on diesel engines are typically __________________ those on similar size gasoline engines.

Back 3

larger than

Front 4

To establish camshaft sensor indexing on a vehicle with an adjustable sensor, all of the following are true, EXCEPT:

attach a lab scope to the crankshaft position sensor signal wire. attach a lab scope to the camshaft position sensor signal wire. start the engine, observe the lab scope and compare the readings. if the readings do not line up the sensor is bad and must be changed.

Back 4

if the readings do not line up the sensor is bad and must be changed.

Front 5

Technician A says that if the oil pressure shows low on the vehicle’s gauge, engine oil pressure should be verified using a manual test gauge. Technician B says that if a vehicle’s oil pressure gauge reads too high, engine oil pressure should be verified using a manual test gauge. Who is correct?

Back 5

Both Technician A and Technician B

Front 6

Heat is transferred from areas of:

Back 6

higher temperature to lower temperature.

Front 7

Which of the following is typically the size you cut a piece of plastic gauge?

Back 7

Just short of the bearing's width

Front 8

Two technicians were discussing the installation of various plugs into the heads and block. Technician A said “When installing gallery plugs and soft plugs, you should apply the appropriate sealer to both.” Technician B says “always install any plugs clean and dry.” Who is correct?

Back 8

Technician A

Front 9

Technician A says that when removing the oil, it can be easy to confuse the oil drain plug and the transmission drain plug. Technician B says that drain plugs should be tightened to the manufacturer recommended torque specification. Who is correct?

Back 9

Both Technician A and Technician B

Front 10

The liquid used for the cooling system is known as:

Back 10

coolant.

Front 11

After the crankshaft has been washed. Technician A says to take a small wire brush and make sure all the oil passages are clean. Technician B says to next, flush the passages with hot oil. Who is correct?

Back 11

Technician A

Front 12

When tightening down the main bearing cap that houses the thrust bearing, you may need to:

Back 12

tap the crankshaft forwards and backwards with a wooden block.

Front 13

Which of the following is NOT a type of oil pickup tube?

Back 13

Solder in

Front 14

Technician A says that to ensure that the oil filter does not leak, you may use two gaskets. Technician B says that using two gaskets could cause an oil leak when the oil is pressurized. Who is correct?

Back 14

Technician B

Front 15

When installing the thermostat:

A. use new gasket or O-ring, if applicable.

B. put gasket sealer on both sides of the gasket.

C. install the thermostat facing the correct direction.

D. All of the answers listed

Back 15

D. All of the answers listed

Front 16

The reason oil levels may be low can be all of the following, EXCEPT:

A. oil burning because of worn piston rings.

B. oil burning because of bad valve guides.

C. oil burning because of a clogged air filter.

D. oil leaks.

Back 16

C. oil burning because of a clogged air filter.

Front 17

Technician A says that a stethoscope can be used to check for oil pressure. Technician B says that a stethoscope has no practical use in automotive testing applications. Who is correct?

Back 17

Neither Technician A nor Technician B

Front 18

The part of a vehicle’s cooling system that transfers the heat from the coolant to the outside air is called the:

Back 18

radiator.

Front 19

The normal mixture of the antifreeze and water that make up coolant is:

Back 19

50/50

Front 20

Before installing piston rings ring end gap needs to be measured. Technician A says to turn a piston upside down and use the head of the piston to square up the ring in the cylinder. Technician B says to carefully examine the ring end-gap by eye and be sure there is a small gap or space between the ring ends. Who is correct?

Back 20

Technician A

Front 21

Which of the following is typically used to measure the crankshaft main bearing journal?

Back 21

Outside micrometer

Front 22

Technician A says head bolts can be tightened with an air ratchet. Technician B says torque head bolts to the manufacturer's specifications and in the proper sequence. Who is correct?

Back 22

Technician B

Front 23

Technician A says that oil pressure is monitored by an oil pressure gauge. Technician B says that oil pressure is monitored by an oil level monitoring system. Who is correct?

Back 23

Technician A

Front 24

On engines with any type of variable valve timing system:

A. check for worn and damaged gears on components.

B. inspect any oil control devices for leaks.

C. perform other tests according to manufacturers recommendations.

D. All of the answers listed

Back 24

D. All of the answers listed

Front 25

Technician A says that electric cooling fans save energy, because they only come on when needed. Technician B says that engine-driven fans are more fuel efficient than electric fans. Who is correct?

Back 25

Technician A

Front 26

The type of heat transfer where heat is transferred from one solid to another is called:

Back 26

conduction.

Front 27

Technician A says that as engine parts are heated, they expand. Technician B says that as water in the cooling system freezes, it expands. Who is correct?

Back 27

Both Technician A and Technician B

Front 28

Technician A says always check thrust bearing end play, as this controls crankshaft end play. Technician B says the thrust bearing clearance can be measured with a torque angle gauge. Who is correct?

Back 28

Technician A

Front 29

Technician A says oil pickup tubes may be one of three types: When installing a piston in the cylinder. Technician A says to use a screw driver to carefully push the piston rings in while tapping the piston into the cylinder. Technician B says to leave the rod bearing out of the connecting rod until the piston is fully installed in the cylinder. Who is correct? in, bolt on, or press in. Technician B says always ensure that timing marks on chains and belts are aligned according to the manufacturer's specifications. Who is correct?

Back 29

Both Technician A and Technician B

Front 30

Why is a magnet involved in the removal of valve keepers?

Back 30

It helps to keep the keepers from falling into the engine.

Front 31

Technician A says that when testing the oil pressure in an engine, you can install the pressure tester in the threaded passage for the oil pressure sender. Technician B says that if the engine makes noise, no pressure test is necessary, because repairs will not be possible. Who is correct?

Back 31

Technician A

Front 32

_____________ is a type of nontoxic antifreeze.

Back 32

Propylene glycol

Front 33

Technician A says only use adhesives and sealers that meet service requirements for the specific engine you are working on. Technician B says that when installing a one-piece crank seal, make sure the pointy lip faces toward the block. Who is correct?

Back 33

Both Technician A and Technician B

Front 34

Technician A says piston-to-cylinder wall clearance can be checked using an outside micrometer and dial bore gauge. Technician B says a temporary test buildup of the rotating assembly allows you to check all critical clearances. Who is correct?

Back 34

Both Technician A and Technician B

Front 35

Technician A says the pressure relief valve keeps the engine from becoming damaged if the oil filter clogs. Technician B says that the bypass valve prevents the engine from becoming damaged if the oil filter clogs. Who is correct?

Back 35

Technician B

Front 36

Technician A says that typically if a timing chain has a half inch or more deflection between the gears, the timing chain and gears need to be changed. Technician B says that typically timing belts are changed after approximately 60,000 miles. Who is correct?

Back 36

Both Technician A and Technician B

Front 37

All of the following are important steps when checking the oil level, EXCEPT:

A. make sure the vehicle is on a level surface.

B. wipe off and reinsert the dipstick before removing it and reading it.

C. hold the dipstick horizontally when reading it.

D. make sure the engine is running.

Back 37

D. make sure the engine is running.

Front 38

The boiling point of water in degrees Fahrenheit is:

Back 38

212

Front 39

Which of the following valve spring types is typically used when checking valve to piston clearance on an engine with hydraulic lifters?

Back 39

Lightweight valve spring

Front 40

When priming the lubrication system on a V8 engine with an electric drill. Technician A says the oil pressure should read within the normal range. Technician B says to make sure that oil reaches all of the valve train.

Back 40

Both Technician A and Technician B

Front 41

An oil pump that is capable of delivering a larger amount of oil than a stock oil pump is called a:

Back 41

high-volume pump.

Front 42

When replacing valve seals on an assembled engine:

Back 42

use compressed air to hold the valves in position.

Front 43

Technician A says that an important quality of a good engine coolant is to prevent freezing. Technician B says that using distilled water instead of tap water in a cooling system will help to control corrosion. Who is correct?

Back 43

Both Technician A and Technician B

Front 44

After the crankshaft has been washed. Technician A says to take a small wire brush and make sure all the oil passages are clean. Technician B says to next, flush the passages with hot oil. Who is correct?

Back 44

Technician A

Front 45

Which of the following is a typical bearing cap installation procedure?

Back 45

Hand-tighten the bolts first then torque the bolts to manufacturer's specs.

Front 46

Technician A says a “short block” consists of the engine block including the crankshaft, rods, pistons, camshaft and timing gear set (in OHV engines). Technician B says a rebuilt engine called a “long block” consists of the short block plus the heads, covers, timing components (in OHC’s), oil pan, and sometimes the flywheel. Who is correct?

Back 46

Both Technician A and Technician B

Front 47

On engines with any type of variable valve timing system:

A. check for worn and damaged gears on components.

B. inspect any oil control devices for leaks.

C. perform other tests according to manufacturers recommendations.

D. All of the answers listed

Back 47

D. All of the answers listed

Front 48

When inspecting for oil leaks, the color of engine oil will be:

Back 48

dark or light brown.

Front 49

The water pump in a vehicle’s cooling system uses a:

Back 49

centrifugal pump.

Front 50

Before installing piston rings ring end gap needs to be measured. Technician A says to turn a piston upside down and use the head of the piston to square up the ring in the cylinder. Technician B says to carefully examine the ring end-gap by eye and be sure there is a small gap or space between the ring ends. Who is correct?

Back 50

Technician A

Front 51

An oil pump that is capable of delivering a larger amount of oil than a stock oil pump is called a:

Back 51

high-volume pump.

Front 52

Technician A says when installing the flex plate use a flywheel wrench to keep the crankshaft from turning. Technician B says that the pressure plate bolts to the flex plate. Who is correct?

Back 52

Technician A

Front 53

Technician A says that when draining engine oil, you run the risk of getting burned, as the oil is typically changed after the engine is warmed up. Technician B says to be safe, always drain oil while the engine is cold. Who is correct?

Back 53

Technician A

Front 54

Technician A says that the thermostat is open when the vehicle is cold. Technician B says that the thermostat opens as the temperature increases. Who is correct?

Back 54

Technician B

Front 55

The liquid with the best available cooling properties because of its ability to absorb large amounts of heat is

Back 55

water.

Front 56

When installing a new oil filter, it is a good idea to:

Back 56

wipe a small amount of oil on the new filter gasket.

Front 57

A solenoid-controlled fan clutch is controlled by:

Back 57

the vehicle’s power train control module (PCM).

Front 58

Technician A says that the number-one failure leading to mechanical breakdown for motorists is cooling system failure. Technician B says that a failing cooling system can affect engine emissions and fuel economy. Who is correct?

Back 58

Both Technician A and Technician B

Front 59

The top radiator hose is typically attached to the:

Back 59

thermostat housing.

Front 60

The correct service interval for organic acid technology (OAT) type coolant is:

Back 60

5 years or 150,000 miles.

Front 61

Technician A says that when testing oil pressure using a manual test gauge, the engine should be completely warm. Technician B says that when using a manual test gauge, you should test the pressure at idle only. Who is correct?

Back 61

Technician A

Front 62

The circulation of the coolant in the cooling system is controlled by the:

Back 62

thermostat.

Front 63

Technician A says that if oil is milky or gray, it may have been contaminated with water or coolant. Technician B says that milky-colored coolant could indicate a blown head gasket. Who is correct?

Back 63

Both Technician A and Technician B

Front 64

Technician A says that auxiliary coolers may be used to cool automatic transmission fluid. Technician B says that auxiliary coolers are used to help cool the engine coolant during periods of high temperature. Who is correct?

Back 64

Technician A

Front 65

Technician A says that electric fans should run continuously to ensure proper engine cooling. Technician B says that a fan is not needed at vehicle speeds above 35 mph. Who is correct?

Back 65

Technician B

Front 66

A crescent oil pump is mounted to:

Back 66

the front of the engine.

Front 67

Technician A says that an oil drain plug gasket made of aluminum, plastic, or fiber is reusable. Technician B says that a drain plug with an integrated silicone gasket is reusable as long as it is in good condition. Who is correct?

Back 67

Technician B

Front 68

Surge tanks:

Back 68

are mounted at the highest point of the cooling system.

Front 69

The process of pulling chemicals apart by using electricity is known as:

Back 69

electrolysis.

Front 70

Before installing piston rings ring end gap needs to be measured. Technician A says to turn a piston upside down and use the head of the piston to square up the ring in the cylinder. Technician B says to carefully examine the ring end-gap by eye and be sure there is a small gap or space between the ring ends. Who is correct?

Back 70

Technician A

Front 71

After the crankshaft has been washed. Technician A says to take a small wire brush and make sure all the oil passages are clean. Technician B says to next, flush the passages with hot oil. Who is correct?

Back 71

Technician A

Front 72

Technician A says pistons must be installed in the correct direction on the connecting rod. Technician B says this is because some pistons have a slight offset and others have oil spit holes. Who is correct?

Back 72

Both Technician A and Technician B

Front 73

Which of the following valve spring types is typically used when checking valve to piston clearance on an engine with hydraulic lifters?

Back 73

Lightweight valve spring

Front 74

Which of the following is typically used to measure the crankshaft main bearing journal?

Back 74

Outside micrometer

Front 75

Technician A says you should set the oil control rings in a straight line. Technician B says make sure the PIP marks are facing up on the compression rings. Who is correct?

Back 75

Technician B

Front 76

When installing oil gallery plugs, Technician A says to install the plugs without sealer, metal to metal. Technician B says to put lock tight compound on the male threads and insert the plug. Who is correct?

Back 76

Neither Technician A nor Technician B

Front 77

Technician A says always use new torque-to-yield head bolts to ensure proper clamping force. Technician B says always clean the threads for head bolts that are reusable. Who is correct?

Back 77

Both Technician A and Technician B

Front 78

Technician A says the torque rating for the crankshaft front center bolt is typically the highest in the entire engine. Technician B says that a clutch alignment tool needs to be used when assembling a clutch. Who is correct?

Back 78

Both Technician A and Technician B

Front 79

Technician A says when removing camshaft belts or chains always follow the manufacturer’s directions regarding the potential use of cam holding tools. Technician B says not using cam holding tools during belt or chain removal can damage camshaft bearings. Who is correct?

Back 79

Technician A

Front 80

Most full-flow oil filters will catch particles as small as ________ microns.

Back 80

30

Front 81

The strainer on the oil pickup tube is designed to:

Back 81

stop large particles of debris from entering the oil pump.

Front 82

Technician A says that to ensure that the oil filter does not leak, you may use two gaskets. Technician B says that using two gaskets could cause an oil leak when the oil is pressurized. Who is correct?

Back 82

Technician B

Front 83

Technician A says that oil changes are unnecessary as long as the oil is at the correct level. Technician B says that some engines may have more than one oil drain plug. Who is correct?

Back 83

Technician B

Front 84

When installing a new oil filter, it is a good idea to:

Back 84

wipe a small amount of oil on the new filter gasket.

Front 85

Technician A says that the number-one failure leading to mechanical breakdown for motorists is cooling system failure. Technician B says that a failing cooling system can affect engine emissions and fuel economy. Who is correct?

Back 85

Both Technician A and Technician B

Front 86

A pressurized cooling system:

Back 86

increases the boiling point of the coolant.

Front 87

Technician A says that green coolant that has been around since the 1930s is categorized as a HOAT coolant. Technician B says that HOAT stands for hybrid organic acid technology. Who is correct?

Back 87

Technician B

Front 88

Technician A says that electric cooling fans save energy, because they only come on when needed. Technician B says that engine-driven fans are more fuel efficient than electric fans. Who is correct?

Back 88

Technician A

Front 89

Technician A says a common undersize main bearing is 0.010" (0.25 mm). Technician B says that grease may need to be applied to the back side of some thrust bearings to hold them in place during assembly. Who is correct?

Back 89

Both Technician A and Technician B

Front 90

The _______________ should be lined up with the oil hole in the bearing saddle.

Back 90

bearing oil hole

Front 91

Technician A says when installing a two-piece main seal, offset the ends of the seal so that one end sits slightly higher than the block surface and the other end slightly lower than the block surface. Technician B says on a neoprene rubber seal, the pointy lip must point toward the outside of the engine. Who is correct?

Back 91

Technician A

Front 92

When installing a piston in the cylinder. Technician A says to use a screw driver to carefully push the piston rings in while tapping the piston into the cylinder. Technician B says to leave the rod bearing out of the connecting rod until the piston is fully installed in the cylinder. Who is correct?

Back 92

Neither Technician A nor Technician B

Front 93

Which of the following is a way to oil prime a newly rebuilt engine?

A. Spinning the oil pump with a drill attached to the pump drive

B. Start the engine and run it at full throttle

C. Pour new oil over all of the internal engine components

D. None of the answers listed

Back 93

A. Spinning the oil pump with a drill attached to the pump drive

Front 94

Which of the following is the correct size of impact socket used to install a soft plug?

Back 94

Slightly smaller size than the soft plug

Front 95

When installing intake manifolds:

A. reuse of gaskets and seals in good shape is allowable.

B. use some RTV sealant at the four corners of the manifold.

C. tighten all manifold bolts snugly with a 3/8ths drive ratchet.

D. None of the answers listed.

Back 95

B. use some RTV sealant at the four corners of the manifold.

Front 96

Technician A says when removing camshaft belts or chains always follow the manufacturer’s directions regarding the potential use of cam holding tools. Technician B says not using cam holding tools during belt or chain removal can damage camshaft bearings. Who is correct?

Back 96

Technician A

Front 97

Technician A says that oil pumps can be driven by the camshaft. Technician B says that oil pumps can be driven by the crankshaft. Who is correct?

Back 97

Both Technician A and Technician B

Front 98

Technician A says that most oil pumps are positive displacement type pumps. Technician B says that most oil pumps are centrifugal type pumps. Who is correct?

Back 98

Technician A

Front 99

The component that stops excess oil pressure from developing is called the oil:

Back 99

pressure relief valve.

Front 100

Technician A says that when filling an engine with oil, you fill it until oil is coming out of the filler hole. Technician B says that it is a best practice to check the oil before and after running the vehicle. Who is correct?

Back 100

Technician B

Front 101

Technician A says that using 100% coolant is better for freeze protection in an engine than a mixture with water. Technician B says a cooling system should not have a mixture of more than 85% antifreeze to 15% water. Who is correct?

Back 101

Neither Technician A nor Technician B

Front 102

The type of heat transfer where heat is transferred from one solid to another is called:

Back 102

conduction.

Front 103

The outward force that is exerted on a rotating body is known as:

Back 103

centrifugal force.

Front 104

Down-flow radiators:

Back 104

use tanks on the top and bottom

Front 105

The device that is attached to the radiator to help draw air through the entire radiator is called the:

Back 105

fan shroud.