Question 1

What type of pin is held in place by spring clips or in the instance of some newer engines, Teflon caps?

Accepted Answer

A) Non-floating pin" 
B) Circlip pin" 
C) Full floating pin 
D) Semi-floating pin" 
A) Non-floating pin" 
B) Circlip pin" 
C) Full floating pin 
D) Semi-floating pin"

Question 2

If all the cylinders have low compression but show minimal leakage, the most likely cause is:

Accepted Answer

A) defective rings" 
B) burnt valve" 
C) defective turbocharger 
D) engine timing off" 
A) defective rings" 
B) burnt valve" 
C) defective turbocharger 
D) engine timing off"

Question 3

What area of the piston has the greatest amounts of expansion?

Accepted Answer

A) Crown" 
B) Skirt" 
C) Pin boss 
D) Oil control ring" 
A) Crown" 
B) Skirt" 
C) Pin boss 
D) Oil control ring"

Question 4

Which of the following tools is used to measure cylinder taper?

Accepted Answer

A) Outside micrometer" 
B) Feeler gauge" 
C) Vernier caliper 
D) Dial bore gauge" 
A) Outside micrometer" 
B) Feeler gauge" 
C) Vernier caliper 
D) Dial bore gauge"

Question 5

Low-tension rings can significantly increase:

Accepted Answer

A) fuel consumption" 
B) fuel economy" 
C) carbon monoxide emission 
D) oxides of nitrogen emission" 
A) fuel consumption" 
B) fuel economy" 
C) carbon monoxide emission 
D) oxides of nitrogen emission"

Question 6

What type of piston uses a full skirt?

Accepted Answer

A) Slipper skirt" 
B) Trunk type" 
C) Articulating 
D) Monosteel" 
A) Slipper skirt" 
B) Trunk type" 
C) Articulating 
D) Monosteel"

Question 7

Final piston machining is done after trimming away the flashing or excess metal squeezed out between the halves of the mold called:

Accepted Answer

A) casting lines" 
B) parting lines" 
C) forge lines 
D) control lines" 
A) casting lines" 
B) parting lines" 
C) forge lines 
D) control lines"

Question 8

What type of piston provides clearance for the turning radius of the crankshaft counterweights when the piston approaches bottom dead center (BDC)?

Accepted Answer

A) Slipper skirt" 
B) Trunk type" 
C) Articulating 
D) Monosteel" 
A) Slipper skirt" 
B) Trunk type" 
C) Articulating 
D) Monosteel"

Question 9

One of the areas that experience the greatest wear is the top ring groove. The high combustion temperatures combined with ring movement in the top ring groove can cause rapid wear of this area. Which of the following is used to prevent this?

Accepted Answer

A) Chromium Rings" 
B) N-Resist insert" 
C) Cast iron insert 
D) Steel compression ring" 
A) Chromium Rings" 
B) N-Resist insert" 
C) Cast iron insert 
D) Steel compression ring"

Question 10

What process is used on connecting rods to relieve stress risers and add additional fatigue strength?

Accepted Answer

A) Haber" 
B) Nitriding" 
C) Shot-peening 
D) Knurling" 
A) Haber" 
B) Nitriding" 
C) Shot-peening 
D) Knurling"

Question 11

What kind of useful information is supplied by measuring the distance a piston protrudes above the cylinder block deck?

Accepted Answer

A) The amount of liner protrusion. 
B) The length of the stroke. 
C) Whether the connecting rod is bent. 
D) The required thickness required for a head gasket. 
A) The amount of liner protrusion. 
B) The length of the stroke. 
C) Whether the connecting rod is bent. 
D) The required thickness required for a head gasket.

Question 12

Technician A says that piston ring markings identify the type of ring and its location in a piston ring groove. Technician B says ring markings are used to ensure the rings are installed facing downward. Who is correct?

Accepted Answer

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

Question 13

Connecting rod tensional loading occurs at the end of the up-strokes at:

Accepted Answer

A) BDC" 
B) TDC" 
C) mid-stroke 
D) 10 degrees after TDC" 
A) BDC" 
B) TDC" 
C) mid-stroke 
D) 10 degrees after TDC"

Question 14

Which ring face material is used on compression rings to aid upper cylinder wall lubrication?

Accepted Answer

A) Steel. 
B) Chrome. 
C) Molybdenum. 
D) Cast iron. 
A) Steel. 
B) Chrome. 
C) Molybdenum. 
D) Cast iron.

Question 15

Two technicians are describing ring gap. Technician A says that too large a ring gap will cause the ends to butt and prevent expansion. Technician B says that too little of a gap will obviously cause a loss of compression and excessive blow-by. Who is right?

Accepted Answer

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

Question 16

What will produce an abnormally high crankcase pressure reading?

Accepted Answer

A) Cold engine" 
B) Hot engine" 
C) Engine at high idle 
D)  Engine at full fuel 
A) Cold engine" 
B) Hot engine" 
C) Engine at high idle 
D)  Engine at full fuel

Question 17

Which of the following is NOT an advantage of using a fracture split rod cap?

Accepted Answer

A) Improved control of oil clearances" 
B) Reduced production costs" 
C) More precise alignment of the rod and cap 
D) Less retention strength" 
A) Improved control of oil clearances" 
B) Reduced production costs" 
C) More precise alignment of the rod and cap 
D) Less retention strength"

Question 18

Diesel cylinder piston- to-wall clearance is being described. Technician A says that before installing piston rings, insert the inverted piston into a clean and properly honed or prepped cylinder. Technician B says that wear in the piston's ring groove dimensions are typically checked with a feeler gauge. Who is right?

Accepted Answer

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

Question 19

What minimizes power robbing blow-by which also leads to oil contamination and excessive crankcase emissions?

Accepted Answer

A) Springs" 
B) High ring gap" 
C) Gas tight sealing 
D) Compression gas" 
A) Springs" 
B) High ring gap" 
C) Gas tight sealing 
D) Compression gas"

Question 20

What is used to stretch a ring just far enough to allow its removal but not too far to cause it to bend or break?

Accepted Answer

A) Ring expanders" 
B) Small pry bar" 
C) Snap ring pliers 
D) Ring installers" 
A) Ring expanders" 
B) Small pry bar" 
C) Snap ring pliers 
D) Ring installers"

What type of pin is held in place by spring clips or in the instance of some newer engines, Teflon caps?

If all the cylinders have low compression but show minimal leakage, the most likely cause is:

What area of the piston has the greatest amounts of expansion?

Which of the following tools is used to measure cylinder taper?

Low-tension rings can significantly increase:

What type of piston uses a full skirt?

Final piston machining is done after trimming away the flashing or excess metal squeezed out between the halves of the mold called:

What type of piston provides clearance for the turning radius of the crankshaft counterweights when the piston approaches bottom dead center (BDC)?

One of the areas that experience the greatest wear is the top ring groove. The high combustion temperatures combined with ring movement in the top ring groove can cause rapid wear of this area. Which of the following is used to prevent this?

What process is used on connecting rods to relieve stress risers and add additional fatigue strength?

What kind of useful information is supplied by measuring the distance a piston protrudes above the cylinder block deck?

Technician A says that piston ring markings identify the type of ring and its location in a piston ring groove. Technician B says ring markings are used to ensure the rings are installed facing downward. Who is correct?

Connecting rod tensional loading occurs at the end of the up-strokes at:

Which ring face material is used on compression rings to aid upper cylinder wall lubrication?

Two technicians are describing ring gap. Technician A says that too large a ring gap will cause the ends to butt and prevent expansion. Technician B says that too little of a gap will obviously cause a loss of compression and excessive blow-by. Who is right?

What will produce an abnormally high crankcase pressure reading?

Which of the following is NOT an advantage of using a fracture split rod cap?

What minimizes power robbing blow-by which also leads to oil contamination and excessive crankcase emissions?

What is used to stretch a ring just far enough to allow its removal but not too far to cause it to bend or break?

Introduction to Diesel Engines

Diesel Engine Emissions

Cylinder Blocks and Crankshafts

Cylinder Heads and Valve Train Mechanisms

Diesel Engine Cooling and Lubrication Systems

Diesel Fuel and Low Pressure Fuel Systems

Functions of High Pressure Fuel Systems

Governors and Electronic Control Systems

Hydraulic Nozzles

Heui Injection Systems

Common Rail Fuel Systems

Air Induction and Crankcase Ventilation Systems

Fixed Geometry and Wastegated Turbochargers

Variable Geometry and Series Turbochargers

Exhaust Gas Recirculation

Exhaust Aftertreatment Systems

On Board Diagnostics

Filters

Exam 5: Cylinder Components

What type of pin is held in place by spring clips or in the instance of some newer engines, Teflon caps?

If all the cylinders have low compression but show minimal leakage, the most likely cause is:

What area of the piston has the greatest amounts of expansion?

Which of the following tools is used to measure cylinder taper?

Low-tension rings can significantly increase:

What type of piston uses a full skirt?

Final piston machining is done after trimming away the flashing or excess metal squeezed out between the halves of the mold called:

What type of piston provides clearance for the turning radius of the crankshaft counterweights when the piston approaches bottom dead center (BDC)?

One of the areas that experience the greatest wear is the top ring groove. The high combustion temperatures combined with ring movement in the top ring groove can cause rapid wear of this area. Which of the following is used to prevent this?

What process is used on connecting rods to relieve stress risers and add additional fatigue strength?

What kind of useful information is supplied by measuring the distance a piston protrudes above the cylinder block deck?

Technician A says that piston ring markings identify the type of ring and its location in a piston ring groove. Technician B says ring markings are used to ensure the rings are installed facing downward. Who is correct?

Connecting rod tensional loading occurs at the end of the up-strokes at:

Which ring face material is used on compression rings to aid upper cylinder wall lubrication?

Two technicians are describing ring gap. Technician A says that too large a ring gap will cause the ends to butt and prevent expansion. Technician B says that too little of a gap will obviously cause a loss of compression and excessive blow-by. Who is right?

What will produce an abnormally high crankcase pressure reading?

Which of the following is NOT an advantage of using a fracture split rod cap?

What minimizes power robbing blow-by which also leads to oil contamination and excessive crankcase emissions?

What is used to stretch a ring just far enough to allow its removal but not too far to cause it to bend or break?

Introduction to Diesel Engines

Diesel Engine Emissions

Cylinder Blocks and Crankshafts

Cylinder Heads and Valve Train Mechanisms

Diesel Engine Cooling and Lubrication Systems

Diesel Fuel and Low Pressure Fuel Systems

Functions of High Pressure Fuel Systems

Governors and Electronic Control Systems

Hydraulic Nozzles

Heui Injection Systems

Common Rail Fuel Systems

Air Induction and Crankcase Ventilation Systems

Fixed Geometry and Wastegated Turbochargers

Variable Geometry and Series Turbochargers

Exhaust Gas Recirculation

Exhaust Aftertreatment Systems

On Board Diagnostics

Filters