Engine

Question 1

Alkaline cleaners will remove rust and scale.

Answer 1

‘False’.

Question 2

Technician A says that an air-fuel mixture that is too lean can cause burned internal engine parts. Technician B says an overly rich mixture can cause oil wash from cylinder walls. Which technician is correct?

Answer 2

Both technicians

Question 3

Technician A says to avoid lubrication on the thrust bearing surfaces. Technician B says when installing main bearing caps, tap them with a ball peen hammer to insure they seat properly. Who is right?

Answer 3

Nether technician

Question 4

Technician A says that the top compression ring groove wears more than the other ring grooves. Technician B says that full floating, piston pin lock rings should be installed with their openings facing up. Who is correct?

Answer 4

Technician A

Question 5

During a compression test, a cylinder shows lower readings than expected. Technician A squirts a tablespoon of oil into the cylinder and the compression raises. He says this indicates a problem with the rings. Technician B says this indicates a burned intake valve. Which technician is correct?

Answer 5

Technician A

Question 6

All of the below are causes of thrust bearing failure, EXCEPT _____.

Answer 6

a correctly installed rope seal

Question 7

The tenth digit of the VIN code will identify the engine size.

Answer 7

False

Question 8

A flexplate is used with a manual transmission.

Answer 8

False’.

Question 9

All of the following are used for chamfering a cylinder EXCEPT a _____.

Answer 9

diamond hone

Question 10

Technician A says that it is alright to disconnect the air conditioning lines and drain the refrigerant in a pan. Technician B says that certification is required to operate a refrigerant recycling machine. Who is right?

Answer 10

Technician B

Question 11

Technician A says that to identify a vehicle all you need to know is the make and model. Technician B says that the VIN code can be found in the owner’s manual. Who is right?

Answer 11

Neither technician

Question 12

Most of today’s cars are powered by _____-cycle engines.

Answer 12

Otto

Question 13

The first oil change on a rebuilt engine should be performed at
Answer
miles.

Answer 13

500

Question 14

Technician A says some manufacturers recommend head bolts going into a coolant passage be sealed with liquid thread sealant. Technician B says RTV stands for right torque value. Who is correct?

Answer 14

Technician A

Question 15

Without protective gloves, it is possible for acid from your hands to etch engine bearings.

Answer 15

True’.

Question 16

Two technicians are discussing “blowby.” Technician A says that “blowby” is gases escaping past the valves. Technician B says that “blowby” is gases escaping past the rings. Which technician is correct?

Answer 16

Technician B

Question 17

Undersize bearings have a thinner bearing back.

Answer 17

False’.

Question 18

Ring gaps on an opposed engine design should be faced down.

Answer 18

False’.

Question 19

Technician A says a hot spray washer is sometimes called a jet washer. Technician B says an advantage of a spray washer is that it cleans oil galleries as well as a hot soak tank. Who is right?

Answer 19

Technician A

Question 20

Automobile piston pins are either pressed fit or full floating.

Answer 20

‘True’.

Question 21

Some main bearings have dowels that must fit into a hole in the block.

Answer 21

‘True’.

Question 22

Of the measuring devices listed below, which is the most accurate in measuring cylinder bore size?

Answer 22

cylinder dial bore gauge

Question 23

Technician A says the rotating end of the connecting rod is the big end. Technician B says the reciprocating end of the connecting rod is the big end. Who is correct?

Answer 23

Technician A

Question 24

Technician A says grounding out a plug wire to a cylinder with a cracked piston will can increase the noise. Technician B says a rod knock will become quieter as its cylinder is grounded. Who is correct?

Answer 24

Both technicians

Question 25

The camshaft controls the rate at which the engine breathes.

Answer 25

True'.

Question 26

Technician A says that most automotive gasoline engines have four strokes per cycle. Technician B says that the crankshaft makes four revolutions during the four-stroke cycle. Which technician is correct?

Answer 26

Technician A

Question 27

Technician A says that a good piston can be ruined by cleaning the grooves on a wire wheel. Technician B says an old, broken piston ring works well to clean the ring grooves. Who is right?

Answer 27

Both technicians

Question 28

Two technicians are discussing engines. Technician A says that a long block is a short block with the addition of the cylinder heads. Technician B says that the term "short block" refers to the engine's displacement. Which technician is correct?

Answer 28

Technician A only.

Question 29

Technician A says the click-type torque wrench is best because it is the most accurate. Technician B says that an inch-pound torque wrench should be used when measuring smaller torque values. Who is correct?

Answer 29

Technician B

Question 30

Oil consumption problems are being discussed. Technician A says a lack of regular services can cause the oil control rings to plug. Technician B says worn compression rings can cause oil consumption problems. Who is correct?

Answer 30

Both technicians

Question 31

The gasoline engine is also known as a spark ignition engine.

Answer 31

True'

Question 32

How many degrees is a complete cycle on a four stroke engine?

Answer 32

720

Question 33

Technician A says powder forged rods are not cut; they are fractured (broken). Technician B says some rods have a spit hole to lubricate the cylinder walls at lower rpms. Who is right?

Answer 33

Both technicians

Question 34

Technician A says that valvetrain noise will occur at half the speed of engine rpm. Technician B says valvetrain noises coming from inside the timing cover can be caused by a bad timing chain or chain guide. Which technician is correct?

Answer 34

Both technicians

Question 35

Technician A says that during engine disassembly, all main and rod bearings should be kept in order in case they will be reused. Technician B says that there is no need to keep bearings in order if new parts are to be used. Who is right?

Answer 35

Technician A

Question 36

Most oval wear on a cylinder is away from the major thrust side.

Answer 36

False'.

Question 37

On an engine with a standard transmission, insure the flexplate is installed correctly.

Answer 37

'False'.

Question 38

An ultrasonic thickness gauge is used to check cylinder wall thickness.

Answer 38

'True'.

Question 39

Engine operation is being discussed. Technician A says preignition can cause engine damage. Technician B says carbon deposits on the pistons can increase the compression ratio. Who is correct?

Answer 39

Both technicians

Question 40

A heli-coil is a thread repair device.

Answer 40

'True'.

Question 41

During engine removal with an automatic transmission, the torque converter stays with the engine.

Answer 41

'False'.

Question 42

How fast does the crankshaft rotate in relationship to the camshaft?

Answer 42

Twice as fast

Question 43

Most of today's automotive pistons are slipper skirt pistons.

Answer 43

'True'.

Question 44

Piston rings are made from all these materials, EXCEPT _____.

Answer 44

aluminum wire

Question 45

Hypereutectic is the description of a popular cast aluminum alloy referring to the percentage of silicon in the aluminum in a piston.

Answer 45

True'.

Question 46

Technician A says a faulty head gasket can cause the oil to mix with coolant. Technician B says bubbles forming in the coolant during engine operation could indicate a leaking head gasket. Which technician is correct?

Answer 46

Both technicians

Question 47

Technician A says that there is a correct sequence to follow when removing head bolts. Technician B says that when a cylinder wears, a ridge forms at the bottom of the cylinder. Who is right?

Answer 47

Technician A

Question 48

Technician A says that all vehicles have vacuum diagrams under the hood and there is no need to mark the vacuum lines. Technician B says that for late model vehicles, microfiche will have all the information you need to rebuild the engine. Who is right?

Answer 48

Neither technician

Question 49

The engine has to be removed to replace a one piece rear main (crankshaft) oil seal.

Answer 49

'True

Question 50

A feeler gauge is used to measure mechanical valve lash.

Answer 50

True'.

Question 51

While discussing an in-vehicle engine repair, Technician A says that sometimes the engine mounts need to be loosened to remove the oil pan. Technician B says that sometimes the oil pump must be unbolted in order to remove the oil pan. Who is right?

Answer 51

Both technicians

Question 52

Technician A says to label the core plugs as they are removed so they can be reinstalled. Technician B says to remove the core plugs before hot tanking the block. Who is correct?

Answer 52

Technician B

Question 53

Technician A says excessive drive belt tension can cause wear on the upper, front main bearing. Technician B says maintaining proper oil clearance and a lower viscosity oil will increase the fatigue life of a bearing. Who is right?

Answer 53

Technician A

Question 54

The engine should be cold before removing the head.

Answer 54

'True'.

Question 55

After glaze breaking or cylinder honing, clean the block with _____.

Answer 55

hot soapy water

Question 56

Technician A says a piston usually has a direction identifying notch that faces the rear of the engine. Technician B says a piston exhibits more wear on its major thrust side. Who is right?

Answer 56

Technician B

Question 57

Two technicians are discussing the power stroke. Technician A says that on a V8 engine, a power stroke occurs every 90 degrees. Technician B says that on an inline six-cylinder engine, the power stroke occurs every 120 degrees. Which technician is correct?

Answer 57

Both technicians

Question 58

A full skirt piston used on longer stroke engines is known as a(n) ____ piston.

Answer 58

trunk

Question 59

The purpose of the harmonic balancer is to____________.

Answer 59

Absorb the twisting of the crankshaft.

Question 60

What cylinder number is the closest to the front of the engine on almost all V-type engines?

Answer 60

1