更多"The operating speed of a turbocharg"的相关试题:
[单项选择]The speed of the turbocharger for a four-stroke/cycle diesel engine driving a generator at constant speed depends on the （）
A. engine speed
B. kilowatt load
C. fuel injection pressure
D. air intake manifold temperature
[单项选择]If the turbocharger failed on an auxiliary diesel engine, which of the following conditions would probably occur?（）
A. Full power cannot be developed
B. The exhaust will contain black smoke
C. Complete combustion will be impossible
D. All of the above
[单项选择]Intake air flow from a diesel engine turbocharger is directly proportional to engine（）
A. exhaust gas pressure
B. exhaust gas temperature
C. speed
D. load
[单项选择]An after-cooler installed between the turbocharger and the cylinder air inlet （）
A. increases the density of the air
B. decrease the density of the air
C. increases the specific heat of the air
D. decreases the specific heat of the exhaust
[单项选择]If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should（）
A. check the air filter for obstruction
B. check for an exhaust leak
C. check the exhaust temperature
D. secure the engine
[单项选择]Why will a turbocharger diesel engine produce black smoke if excessive additional load is applied too quickly?（）
A. Exhaust energy would draw excess air
B. The inertia of the turbocharger rotor causes a time lag which delays the turbocharger speed increase
C. Exhaust gas pumping losses are increased due to turbine windage
D. Exhaust gas back pressure falls slightly due to increased nozzle action
[单项选择]Leaking oil seals on a diesel engine turbocharger can cause（）
A. the engine to run after the fuel has been secured
B. the engine to over-speed
C. a fire
D. all of the above
[单项选择]
Continuous surging of turbocharger can be caused by（）
①crash stop of engine
②increased back pressure after T-Ch
③fouled or damaged turbine nozzle ring
A. all are correct
B. ②and③are correct
C. none of the above is correct
D. ①only is correct
[单项选择]In a turbocharger, inlet air velocity is increased in the（）.
A. inlet nozzle ring
B. stationary diffuser passages
C. compressor outlet volute
D. rotating impeller vanes
[单项选择]Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? （）
A. Blank off the exhaust gas inlet to the damaged turbocharger
B. Secure cooling and lubrication to the damaged turbocharger
C. Lock the rotor of the damaged turbocharger
D. All of the above
[单项选择]When used in conjunction with a turbocharger, the main function of an after-cooler is to （）
A. increase the density of the cylinder air charge
B. prevent turbocharger overheating
C. liminate the need for a pre-cooler
D. remove moisture from air compressed by the turbocharger
[单项选择]If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?（）
A. Intake manifold pressure will be high
B. Intake manifold pressure will be unaffected
C. Exhaust temperatures will be high
D. Exhaust temperatures will be low
[单项选择]
A few spots of turbocharger can be caused by（）
①crash stop of engine
② rapid increased of engine speed
A. ①only is correct
B. ②only is correct
C. both ① and ②are correct
D. neither ① or ② correct
[单项选择]Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed （）.
A. apparent slip
B. tree slip
C. pitch
D. propulsive efficiency
[单项选择]The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.
A. two-stroke
B. four-stoke
C. long-stroke
D. short-stroke
[单项选择]A Doppler speed log indicates speed through the water（）.
A. at all times
B. in the bottom return mode
C. in the volume reverberation mode
D. only when there is no current
[单项选择]Safe speed is defined as that speed where（）.
A. you can stop within your visibility range
B. the vessel is not subject to vibrations
C. you are traveling slower than surrounding vessels
D. you can take proper and effective action to avoid collision
[单项选择]A Doppler speed log indicates speed over ground（）.
A. at all times
B. in the bottom return mode
C. in the volume reverberation mode
D. only when there is no current
[单项选择]SAFE SPEED is defined as that speed where（）.
A. you can stop within your visibility range
B. you can take proper and effective action to avoid collision
C. you are traveling slower than surrounding vessels
D. no wake comes from your vessel
