更多"（） supplies pilot air to control th"的相关试题:
[单项选择]The pressure of pilot air is usually （） than that of starting air.
A. higher
B. lower
C. low
D. high
[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 cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.
A. the beginning of the compression stroke
B. the beginning of the suction stroke
C. the end of the working stroke
D. the end of the exhaust stroke
[单项选择]The starting air entering the cylinder begins when the piston（）
A. has nearly come to the TDC
B. has just past the TDC
C. has nearly come to the BDC
D. has just past the BDC
[单项选择]Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.
A. charging
B. super charging
C. scavenging
D. exhausting
[单项选择]The air cylinder bottles in the survival craft should be refilled with（）.
A. oxygen
B. nitrogen
C. compressed air
D. nitrogen and oxygen
[单项选择]For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?（）
A. Chilled water system supply temperature
B. Chilled water system return temperature
C. Compressor discharge temperature
D. Compressor suction pressure
[单项选择]Air compressor cylinder un-loaders enable the compressor to （）.
A. vary their speed according to temperature and load
B. start and come up to speed before air compression begins
C. change speed according to overload demands
D. reduce compressed air charge density
[单项选择]When the starting air valve closes on one cylinder, another starting air valve has （） opened on another cylinder whose piston has just commenced its downward stroke.
A. just
B. nearly
C. merely
D. already
[单项选择]The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.
A. BDC
B. TDC
C. BBDC
D. ATDC
[单项选择]Air scavenging of a diesel engine cylinder（）
A. blows out the exhaust gases
B. supplies oxygen for combustion
C. cools the valves and cylinder walls
D. all of the above
[单项选择]How does combustion air enter the cylinder of a two-cycle diesel engine?（）
A. Cylinder head valves
B. Ports
C. Turbo chargers
D. Bleeder valves
[单项选择]（） the cylinder will contain a great weight of air and will be capable of burning a great quantity of fuel.
A. At the beginning of the compression stroke
B. At the beginning of the suction stroke
C. At the end of the working stroke
D. At the end of the exhaust stroke
[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 cylinder liner forming the cylinder wall and the inside of the water jacket is called a（）
A. dry liner
B. wet liner
C. jacket liner
D. corrugated liner
[单项选择]Cracks in cylinder and cylinder covers may （） from unequal heating.
A. make
B. cause
C. result
D. produce
[单项选择]On the top of the cylinder is mounted the cylinder cover which is pressed onto （） of the cylinder liner by means of nuts and studs.
A. the camshaft
B. the flange
C. the ridge
D. the bulge
[单项选择]The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices during （）
A. the upward stroke
B. the downward stroke
C. the power stroke
D. the suction stroke
[单项选择]The cylinder head, cylinder liner and （） form the combustion chamber.
A. frame
B. piston
C. crankcase
D. explosion plate
