Exam 16: Diesel Engine Run- in and Performance Testing

Which of the following values represents a typical maximum oil temperature specification in a diesel engine?

When installing a tandem drive axle truck on a chassis dynamometer, which wheels must be wedged and chained?

What is the hydraulic medium used in a typical truck chassis dynamometer?

Which of the following is the most important requirement before taking a truck out on a road test?

In order to purge air from a diesel engine cooling system after reconditioning, which of the following is recommended?

When using a dynamometer to break in a set of piston rings on a rebuilt diesel engine, what is the minimum period the engine should be run at maximum power at rpms within its torque rise profile?

Technician A says that recapped tires should never be used when chassis dynamometer testing trucks due to the increased risk of tread separation. Technician B says that when snow lugs are fitted to a truck being dynamometer tested, overheating and erratic performance results. Who is correct?

What is another way of saying engine longevity?

Which type of dynamometer functions similarly to an electric motor turned in reverse?

What is the main safety reason that no person should be outside the vehicle in a chassis dynamometer test room during testing?

What percentage of brake horsepower is produced at a set of tandem axle drive wheels compared with brake horsepower produced at the flywheel?

When a truck diesel engine is run in a linehaul application, how is the truck being run?

When a double roller type chassis dynamometer is used to test a truck, what is the maximum speed difference permissible between the rear axles?

Which of the following methods of priming a diesel fuel system is NOT recommended?

What is the preferred method of priming an engine lubrication system with engine oil?

When running a truck on a chassis dynamometer, what gear ratio should be selected for most of the test sequence?

When chassis dynamometer testing trucks, which of the following can damage health or cause personal injury?

Which of the following values represents a typical maximum diesel engine coolant temperature specification?

Following a full load dynamometer test, what is the minimum period the engine should be run at idle speed before shut down?

When testing a tandem drive axle truck on a double roller chassis dynamometer, what is the maximum acceptable road speed differential between the two drive axles?