Deck 9: Engine Housing Components

Question 1

Which of the following components would NOT be classified as part of the engine housing?

A) flywheel
B) cylinder block
C) cylinder heads
D) rocker housing

Answer 1

flywheel

Question 2

What material is used in the manufacture of most commercial diesel engine cylinder blocks today?

A) compacted graphite iron (CGI)
B) aluminum alloy
C) middle alloy steel
D) gray cast iron

Answer 2

compacted graphite iron (CGI)

Question 3

What material is most commonly used in the manufacturing of diesel engine cylinder heads?

A) forged steel
B) aluminum alloy
C) middle alloy steel
D) cast iron

Answer 3

cast iron

Question 4

Which of the following is NOT usually found in heavy-duty diesel engines?

A) wet liners
B) parent bore
C) dry sleeves
D) wet/dry liners

Question 5

Which of the following engines uses a parent bore cylinder block?

A) Detroit Diesel DD15
B) MaxxForce 13
C) Mercedes Benz 900 series
D) Cummins ISX

Question 6

Which of the following transfers heat most efficiently to the engine coolant?

A) parent bore
B) dry liners
C) wet liners
D) oversized dry liners

Question 7

What is wet liner cavitation caused by?

A) bubble collapse
B) engine overheating
C) engine overspeed
D) water pump failure

Question 8

Where does cavitation erosion normally occur on a wet liner?

A) fore and aft
B) aligned with the piston thrust faces
C) under the upper flange
D) below the lower O-rings

Question 9

Which of the following liner types would likely be composed of the least amount of material?

A) dry liners
B) wet liners
C) wet/dry liners
D) wet sleeves

Question 10

What would be a typical clearance specification for a "loose" fit dry liner?

A) 0.0005 inches
B) 0.0015 inches
C) 0.003 inches
D) 0.005 inches

Question 11

What should be done before removing a piston from a liner?

A) remove the crankshaft
B) remove the main caps
C) hone a crosshatch
D) scrape away the carbon bridge

Question 12

When a hone is used to glaze-bust a liner what is the recommended grit stone rating?

A) 100 - 150
B) 200 - 250
C) 250 - 300
D) 300 - 350

Question 13

What is the recommended crosshatch crossover angle on a typical liner?

A) 10 degrees
B) 30 degrees
C) 60 degrees
D) 80 degrees

Question 14

When checking a cylinder block deck for warpage with a thickness gauge and straight edge, what would be a typical maximum specification?

A) 0.001 inch
B) 0.002 inch
C) 0.004 inch
D) 0.008 inch

Question 15

To what depth should a liner crosshatch be machined to?

A) 5 - 10 microinches
B) 15 - 20 microinches
C) 25 - 30 microinches
D) 30 - 40 microinches

Question 16

When hydrostatic pressure testing a cylinder head, which areas should be most closely examined for leaks?

A) rocker pedestals
B) valve bridge guides
C) oil and coolant ports
D) valve seats and injector sleeves

Question 17

What should be used to check valve seating?

A) machinist's blue
B) dial indicator
C) dial bore gauge
D) plastigage

Question 18

When following a cylinder head bolt torque sequence while torquing a single slab cylinder head, which bolts should be torqued last in the sequence?

A) those in the center
B) those on the intake side
C) those on the exhaust side
D) those furthest from the center

Question 19

When a cylinder head bolt torque specification requires that the fastener is first torqued, then turned through a further set number of degrees, the method is known as:

A) template torque
B) twist torque
C) constant clamping force
D) bolt tensioning

Question 20

In a heavy-duty diesel engine, which of the following is more likely to be described as tuned?

A) intake manifold
B) air to air cooler
C) exhaust manifold
D) main exhaust pipe

Question 21

Which of the following would be the preferred method of removing a tough-to-remove gasket from an oil pan flange?

A) oxy-acetylene rosebud
B) gasket eliminator chemical
C) pneumatic gasket remover
D) right angle grinder

Question 22

If a single slab cylinder head is used on an in-line 6-cylinder diesel engine, how many engine cylinders will the cylinder head cover?

A) one
B) two
C) three
D) six

Question 23

What recently introduced technology enables the use of aluminum cylinder blocks in light and medium duty diesel engines?

A) plasma transfer wire arc (PTWA)
B) anodizing
C) drop-forging
D) centrifugal cast composite (CCC)

Question 24

Technician A says that cylinder block torque twist can be the result of high cylinder pressures. Technician B says that cylinder block toque twist can be the result of drivetrain forces outside of the engine. Who is correct?

A) Technician A only
B) Technician Bonly
C) Both A and B
D) Neither A nor B

Question 25

Technician A says that a disadvantage of an induction-hardened parent bore cylinder block is that when a single bore wears, the cylinder block has to be replaced. Technician B says that cavitation erosion is more likely to occur in engines manufactured with parent bores. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B