A.lubricating
B.cooling
C.sealing
D.cleaning
您可能感兴趣的试卷
你可能感兴趣的试题
A.is coming upward;cylinder ring belt
B.is going downward;piston ring belt
C.is coming upward;piston ring belt
D.is going downward;cylinder ring belt
A.Large crosshead type;crossheads
B.High speed;the cylinders
C.Large crosshead type;the cylinders
D.Four-stroke;pistons and cylinders
A.removing heat and deposits
B.neutralizing acidic products
C.lubricating
D.improving combustion efficiency
A.camshaft;fresh air
B.camshaft;starting air
C.electronic motor which is controlled by a computer;fresh air
D.electronic motor which is controlled by a computer;starting air
A.the starting air supply is cut off and fuel is injected into the cylinders
B.the fuel feeding is cut off and the turning gear is put in
C.the starting air supply is cut off and turning gear is taken out
D.the electric blower is shut down and fuel is injected into the cylinders
A.suction stroke
B.compression stroke
C.power stroke
D.exhaust stroke
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
A.pilot air;pilot air
B.handle;solenoid
C.handle;pilot air coming through the distributor
D.solenoid;pilot air coming through the distributor
A.supplying high pressure oil into a hydraulic motor
B.supplying high temperature air into the cylinder
C.supplying high pressure air into the cylinder
D.electrical igniting
A.can be started at low temperature and are free from preheating
B.usually are preheated by steam before being started
C.are kept at a constant temperature and free from preheating
D.are kept at a low temperature to save energy
最新试题
The ISPS Code consists of a mandatory section-Part A, which shows()
Which of the following items don’t belong to dock repair works?()
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()
The treatment of the fuel oils involves storage, heating, filtering and()
If separating effect is not good, which measure should be taken ()
Using a file without a handle may result in ()
Which one is NOT the ‘clear grounds’ for a more detailed inspection?()
Engine parameters shall be corresponded to NOx Technical Files. This is required by ()
The main purpose of port State control is not to()
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()