Chapter 1

Question 1

Who invented the diesel engine?

Answer 1

Rudolf Diesel

Question 2

True or False?

Both gasoline and diesel engines have a cylinder block, crankshaft, valve train, camshaft, pistons, connecting rods, a lubrication system, and a cooling system.

Answer 2

True

Question 3

True or false?

Both 2 and 4 stroke diesel engonesncan be used in high horsepower applications.

Answer 3

True

Virtually all high horsepower pasoline engines are 4 cycle engines, but that is not the case with diesel engines.

Question 4

What two actions occur on the upstroke of a 2 stroke diesel engine?

Answer 4

Intake and compression

Question 5

What two actions occur on the downstroke of a 2 stroke diesel engine?

Answer 5

Power and exhaust

Question 6

True or false?

Diesel engines are always fuel injected.

Answer 6

True

Question 7

True or false?

Diesel engines operate at higher compression ratios than gasoline engines.

Answer 7

True.

Typical diesel compression ratios range from 16:1 to 24:1 while gasoline compression ratios range from 7.5:1 to 9.5:1

Question 8

What value does the higher compression ratio of a diesel engine compared to a gasoline engine provide?

Answer 8

The higher the compression ratio results in greater thermal expansion of gases in the cylinder following combustion which allows a higher percentage of the fuel energy being converted to be used for power

Question 9

Why cant diesel compression ratios be used in gasoline engines?

Answer 9

Preignition and detonation would occur

Question 10

Fuel efficiency in diesel engines can be as high as ___%, whereas a gasoline engine at peak efficiency converts only about ___% of its fuel i to usable power.

Answer 10

40%

25% (the rest is lost as heat)

Question 11

A typical heavy duty diesel truck engine will run for ______-______ miles before it must be rebuilt and can be rebuilt several times (gasoline engine parts are less durable)

Answer 11

400,000 - 1,000,000