DSL-202 Chap 18: Governors

What happens during governor cut-off?

• Road speed is reduced

• Turbo waste gates

• Fuel supply is shut off

• Engine derates

Technician A says all governors will maintain idle speed to prevent stalling. Technician B says electronic governors can provide additional features except for cruise control. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Air-fuel ratios less than __________ will produce smoke.

• 100:1

• 150:1

• 200:1

• 250:1

Which of the following statements about torque is NOT correct?

• Torque is a twisting force exerted by the crankshaft of an engine

• Torque is the force that moves the vehicle or equipment load.

• Motion is necessary to produce torque.

• It is helpful to understand that an engine produces virtually no torque at idle or high idle.

Technician A says the sophistication of software-controlled governing on electronic engines has allowed the term governor to fall into disuse. Technician B says that now governors operate invisibly using electronic signal processing strategies, and its operation is programmable. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

The rated speed is the RPM at which the most ___________ is produced in a diesel engine.

• Horsepower

• Torque

• RPM

• Speed drop

When having a discussion concerning hunting; Technician A says hunting refers to the rhythmic change in engine idle speed often caused by balanced fuel delivery to all engine cylinders. Technician B says both electronically and mechanically governed engines can hunt under a variety of operating conditions. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

The best diesel engine fuel economy is obtained when in a(n) __________ mode

• Overdrive

• Direct drive

• Underdrive

• Lugging

Which governor component adjusts to increase fuel delivery?

• Governor spring

• Gear segment

• Flyweights

• Return spring

How would you best describe the condition of flyweight force equaling spring force?

• Idle

• Rated speed

• Balanced

• Lugging