更多"A charge of fresh air is drawn into"的相关试题:
[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]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]The fresh air coming in through the inner air ports, is compressed by（） to a higher pressure.
A. the cylinder head
B. the cross-head
C. the moving piston
D. the stationary piston
[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]The fresh air intake of the inert gas system（）.
A. prevents the flue gas from falling below 3% content of oxygen
B. allows the inert gas piping to be used for gas freeing the tanks
C. opens when there is excessive vacuum on the deck water seal
D. enables outside air to mix with and cool hot flue gasses
[单项选择]In slow speed two-stroke engines,（）the fresh air entering begins when and stops as（）
A. the inlet port is opened by the up coming piston； the port is closed by the down going
B. the inlet valve is opened by the down going piston；the inlet valve is closed
C. the inlet port is opened by the down going piston；the port is closed by the up coming
D. the inlet valve is opened
[单项选择]Who is in charge of the main engine?（）
A. The chief engineer
B. The second engineer
C. The third engineer
D. The fourth engineer
[单项选择]The fresh water generator produces fresh water （）.
A. by cooling sea water
B. by heating sea water
C. by evaporation of sea water
D. by purifying sea water
[单项选择]The diffuser prevents pressure pulses from one cylinder （） another during operation.
A. to interfere with
B. interfering with
C. to help scavenging
D. helping scavenging
[单项选择]The main factor determining the output of each cylinder is the cylinder （）.
A. density
B. bore
C. weight
D. material
[单项选择]Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）
A. Plugged injector nozzles
B. Excessive fuel injection
C. Very late injection timing
D. Incorrect crankshaft clearance
[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]The loran lines drawn on navigation charts represent（）.
A. Ground waves
B. Skywaves
C. Either ground waves or skywaves interchangeably
D. An average between ground wave and skywave positions
[单项选择]Air entering an air-cooled refrigeration system is indicated by （）.
A. frosting of the liquid line
B. higher than normal head pressure
C. a clear sight glass
D. abnormally cold reefer boxes
[单项选择]Compressed air is supplied by air compression to （）.
A. the air receivers
B. the starting valves
C. the cylinder covers
D. the distributors
[单项选择]Air line lubricators are used in compressed air systems to lubricate （）.
A. the suction and discharge valves
B. tools and equipment served by compressed air
C. air line reducing valves
D. all of the above
[单项选择]Air conditioning is the process of treating air to control （） its temperature, humidity, cleanliness and distribution to meet the comfort requirements of the occupants of the conditioned space.
A. instantaneous
B. instantaneously
C. simultaneous
D. simultaneously
[单项选择]In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be （）.
A. superheated
B. saturated
C. condensed
D. convected
