单选题 Which of the following reasons represents why the designed compression Ratio of a gasoline engine is lower than that of a diesel engine?

A、 Compression must be low for effective spark ignition.
B、 Compression must be low for required horsepower and torque generation.
C、 Compression must be low to prevent pre-ignition.
D、 Compression must be low to have effective pre-ignition.
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相关试题

单选题 Poor combustion in a diesel engine Can be caused by .

A、 high compression pressure
B、 low compression temperature
C、 low exhaust pressure
D、 high scavenge air pressure

单选题 The power/expansion stroke shown

In the illustration is indicated by the

Diagram numbers ____.64dcae5690508ae16b715ce4077a6fb8

A、

1 through 3

B、

4 through 6

C、

1 through 4

D、

3 through 6

单选题 How many power strokes per crankshaft revolution are there in an eight Cylinder two-stroke diesel engine?

A、 One
B、 Two
C、 Four
D、 Eight

单选题 Which characteristic of the theoretical Otto cycle does not occur in the Theoretical Diesel cycle?

A、 No pressure increase during combustion.
B、 Rapid pressure decrease during compression.
C、 Rapid volume increase during combustion.
D、 The entire fuel charge is present for ignition

单选题 The engine shown in the illustration is

Currently on what stroke of its mechanical cycle?319c784458c9770e7d0b0e0890c55eea

A、

intake stroke

B、

exhaust stroke

C、

compression stroke

D、

power stroke

单选题 The intake ports of a two-stroke diesel engine are Opened and closed by the action of the .

A、 camshaft
B、 piston movement
C、 exhaust valves
D、 vertical drive

单选题 Which of the listed design features is most common with a two-stroke cycle Low-speed main propulsion diesel engine?

A、 Piston rod and crosshead construction
B、 90 degree V configuration
C、 Double acting trunk type pistons
D、 Single reduction gearing

单选题 A disadvantage of a four-stroke over a two-stroke diesel engine is .

A、 higher working temperature of piston and cylinder
B、 the required use of scavenging ports
C、 greater weight per horsepower ratio
D、 intake valve temperatures higher than exhaust valve temperatures