单项选择题The rate of wear on a cylinder liner depends on the ()

A.quality of air filtration
B.effectiveness of lubrication
C.type of fuel used
D.all of the above


您可能感兴趣的试卷

你可能感兴趣的试题

1.单项选择题In diesel engineering practice, the term used to express the ignition quality of a particular fuel is()

A.cetane number
B.octane number
C.ignition index number
D.volatility point

2.单项选择题The cetane number rates fuels for diesel engines according to its ()

A.antiknock characteristics
B.ignition qualities
C.rates of vaporization
D.viscosity

3.单项选择题Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an()

A.increase in starting air pressure
B.increase in lube oil viscosity
C.compression expansion device
D.jacket water heater

4.单项选择题The burning of fuel oil in a diesel engine having a high sodium content, will cause ()

A.corrosion and grooving of exhaust valves
B.corrosion and gumming of the fuel injection pump
C.salt deposits in the exhaust manifold
D.slag deposits in the fuel injection equipment

5.单项选择题The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in ()

A.clogged fuel injection pumps
B.increased cylinder liner wear
C.intake valve stem corrosion
D.varnish deposit on pistons

6.单项选择题Which of the following problems may occur when using fuel oil with a high sulphur content?()

A.Injection lag
B.Lube oil dilution
C.Pre-ignition
D.Corrosion

7.单项选择题Burning fuel with a high sulfur content in a diesel engine will ()

A.increase thermal efficiency
B.cause clogging of the fuel system
C.increase the ability of the engine to start in cold weather
D.produce corrosion in the cylinder and exhaust system at low loads

8.单项选择题Leaking oil seals on a diesel engine turbocharger can cause()

A.the engine to run after the fuel has been secured
B.the engine to over-speed
C.a fire
D.all of the above

9.单项选择题If the back clearance of a piston ring is excessive,()

A.compression pressure in the cylinder will be higher
B.carbon will accumulate behind the ring
C.combustion gases will penetrate beneath the ring land
D.piston side thrust will be increased