更多"As the air passes through the charg"的相关试题:
[单项选择]In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.
A. pressure charged
B. naturally aspirated
C. contaminated
D. high speed diesel
[单项选择]“This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）
A. a modern diesel engine；a turbine wheel
B. a modem diesel engine；exhaust gases
C. a compressor；an exhaust gas turbocharger
D. a compressor；a turbine wheel
[单项选择]A charge of fresh air is drawn into the engine cylinder and then （） by the moving piston（） very high pressure.
A. pressed；to
B. pressurized；with
C. pushed；in
D. compressed；to
[单项选择]As the refrigerant passes through the valve orifice, its pressure is reduced and part of the refrigerant turns into （）.
A. liquid
B. oily mixture
C. emulsion
D. vapor
[单项选择]Defective air cooler in a diesel engine will lead to （）.
A. smoky exhaust
B. starting failure
C. overload
D. over speed
[单项选择]Open the （）of inter cooler before starting an air compressor.
A. cylinder cover
B. cooling water
C. oil cup
D. drain valve
[单项选择]Where a propeller shaft passes through the hull，water is prevented from entering by means of a（）.
A. stuffing box
B. propeller boss
C. seacock
D. stop-water
[单项选择]On what do you depend having the air cooler of main engine chemically washed?（）
A. increased air pressure differenced before and aft air cooler
B. reduced exhaust temperature in all cylinders
C. reduced temperature difference between water inlet and outlet
D. both A and C
[单项选择]（） the cylinder walls, the heat passes through them by conduction.
A. When receiving by
B. When received by
C. In order to receiving
D. In order to receive
[单项选择]An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
A. oil foaming in the compressor
B. higher than normal suction and discharge pressures with a higher box temperature
C. higher than normal discharge pressure with a normal box temperature
D. the compressor to run continuously
[单项选择]When the air charge contacts with the cylinders and pistons and mixes with the residual gases, it will（）
A. increase in temperature
B. lose its energy partly
C. expand and do work
D. begin to be compressed
[单项选择]The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）
A. Low compression pressure and high exhaust temperature
B. Low firing pressure and high exhaust temperature
C. Low compression pressure and low exhaust temperature
D. Low firing pressure and low exhaust temperature
[单项选择]The air charge leaving an intercooler, or after-cooler of an air compressor can be expected to be （）.
A. superheated
B. super-cooled
C. at or below the dew point
D. All of the above
[单项选择]I am a fresh air fiend.（）
A. 我是邪神，喜欢新鲜空气。
B. 我酷爱室外的活动。
C. 我这人特喜欢新鲜空气。
D. 我是个喜爱户外运动的人。
[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]Air receivers installed in starting air systems are to be （）.
A. cylindrical in shape with service connections located at the top and bottom
B. opened and made available for inspection during biannual inspections provided
C. with automatic drain traps for the removal of moisture
D. so installed as to make the drain connections effective under extreme conditions of trim
[单项选择]What generally occurs when the land is cooler than the nearby water? （）
A. A land breeze
B. A sea breeze
C. A norther
D. A prevailing westerly
[单项选择]The function of the after-cooler installed between the turbocharger and intake manifold on some diesel engine, is to （）
A. increase the density of the intake air
B. decrease turbocharger power usage
C. reduce exhaust gas temperature
D. compensate for turbocharger PRM fluctuations
