Week #2 - Engine Disassembly

Question 1

True or False: An engine dynamometer is likely to produce a brake power rating closer to the OEM-specified power than a chassis dynamometer test.

Answer 1

True

Question 2

It is usually essential to run a rebuilt diesel engine at full load for a short period after a rebuild to seat the piston rings.

Answer 2

True

Question 3

Which of the following electronic controllers would have to be disabled before performing a chassis dynamometer test?

a. Collision warning system (CWS)
b. Engine ECM
c. Transmission ECM
d. Automatic traction control (ATC)

Answer 3

d. Automatic traction control (ATC)

Question 4

True or False: When performing dynamometer testing of an engine, the altitude of the test location must be considered when analyzing the power.

Answer 4

True

Question 5

If all three options were available and time is not a consideration, which of the following options would be the preferred method of running-in a rebuilt engine?
a. Road test
b Chassis dynamometer
c. Engine dynamometer

Answer 5

c. Engine dynamometer

Question 6

True or False: The chassis dynamometer produces brake power readings at the wheels that are always lower than OEM-rated power.

Answer 6

True

Question 7

True or False: Ambient temperature variations have a greater effect on brake power produced than altitude.

Answer 7

False

Question 8

True or False: A truck rebuilt diesel engine run-in procedure usually requires that the engine be operated at medium to low loads for the first 1,000 miles (1,600 km) of operation.

Answer 8

False