更多"It is very important that each cyli"的相关试题:
[单项选择]It is very necessary that each cylinder （） before the charged air is compressed.
A. is scavenged
B. is atomized with fuel oil
C. be scavenged
D. be atomized with fuel oil
[单项选择]Wires should have each feature of the following except （）
A. flame retardant
B. moisture resistant
C. oil resistant
D. low conductivity
[单项选择]
In a diesel engine, a cylinder liner should be replaced if it is （）
Ⅰ.Scuffed
Ⅱ.Scored
A. Ⅰ only is correct
B. Ⅱ only is correct
C. both Ⅰ and Ⅱ are correct
D. neither Ⅰ or Ⅱ are correct
[单项选择]Each cylinder in a two stroke cycle engine experiences combustion（）.
A. once each crankshaft revolution
B. twice each crankshaft revolution
C. every other crankshaft revolution
D. every fourth stroke
[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]Each cylinder liner on the marine medium speed engines （）.
A. is usually cooled by sea water
B. can be replaced when worn out
C. is in direct contact with the water in the bore of the cylinder
D. can t expand when heated
[单项选择]Each cylinder has one starting valve which is usually opened by air pressure and closed by （）
A. nuts and bolts
B. new joints
C. spring force
D. sealing rings
[单项选择]In each cylinder cover is a large central opening for mounting （）
A. the indicating cock
B. the starting valve
C. air inlet valve
D. the exhaust valve
[单项选择]What is the MOST important thing you should do before transmitting on a marine radio? （）
A. Ask for permission
B. Record the time in your radio log
C. Press the push to talk button three times
D. Monitor the channel to insure that it is clear
[单项选择]There is an injection pump for each cylinder, which is usually operated once every cycle by （） on the camshaft.
A. a gear
B. a cam
C. a rod
D. a miler
[单项选择]In each cylinder cover there are two or three holes for （）
A. the exhaust valves
B. the fuel valves
C. indicator cocks
D. the fuel pumps
[单项选择]The bore of each cylinder is formed in a liner which can be （） when worn out.
A. welded
B. replaced
C. drilled again
D. bored
[单项选择]Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.
A. cylinder liner
B. coupling flange
C. cylinder cover
D. piston crown
[单项选择]VHF radio is one of the very important navigational instruments on board,（）messages can be sent.
A. by which
B. through which
C. by that
D. through that
[单项选择]VHF Radio is one of the very important navigational instruments on board，（）messages can be sent.
A. by which
B. through which
C. by that
D. through that
[单项选择]The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.
A. be affected
B. affect
C. be effected
D. effect
[单项选择]（） play a very important part in hydraulic systems by preventing interaction between different parts of the hydraulic circuit.
A. Motors
B. Check valves
C. Safety valves
D. Reducing valve
[单项选择]Why should the SES operators be very careful when the ship enters the area where three ocean regions overlap? Because（）.
A. the weather is always terrible
B. the condition there is complicated
C. the signals are too strong
D. their SES may receive the signals from unwanted satellite
