单项选择题One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the ()

A.crankcase
B.cylinder head
C.valve cover
D.engine frame


您可能感兴趣的试卷

你可能感兴趣的试题

2.单项选择题Lube oil in the fresh water cooling system of a diesel engine may result from a ()

A.camshaft seizure
B.lube oil pump failure
C.lube oil cooler failure
D.lube oil pump overflow

3.单项选择题Which of the following problems is the main source of fuel pump and injection system malfunctions?()

A.Improper lubrication
B.Air in the fuel system
C.Coated fuel lines
D.Excessive vibration

4.单项选择题Which of the following faults would allow lube oil to enter the cooling system of a diesel engine?()

A.Excessive valve train lubrication
B.Leaking standby oil cooler core
C.Excessive lube oil pressure
D.Excessive lube oil in the system

5.单项选择题Problems with the diesel engine fuel injection pump are usually caused by()

A.improper adjustment
B.contaminated fuel
C.kinked fuel lines
D.excessive engine vibration

6.单项选择题Diesel engine cylinder head test cocks are used to()

A.check cylinder lubrication prior to starting engine
B.connect exhaust gas analyzers to determine engine efficiency
C.pressure test cylinder heads to check for leaks
D.remove moisture accumulations from cylinder prior to starting

7.单项选择题A turbocharged diesel engine will have an intake manifold pressure()

A.constantly decreasing as engine load increase
B.constantly increasing as the amount of supercharging increases
C.approximately equal to exhaust manifold pressure at all times
D.approximately equal to atmospheric pressure at all times

8.单项选择题A leaking diesel engine fuel injector will cause()

A.prolonged maintenance intervals
B.improved atomization
C.greater fuel economy
D.incomplete combustion

9.单项选择题The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually()

A.greater than the average exhaust manifold pressure
B.less than the average exhaust manifold pressure
C.greater at the turbine wheel than at the impeller
D.greater at reduced engine speed

10.单项选择题A sudden decrease in the diesel engine lube oil viscosity could be an indication of()

A.loss of additives from the lube oil
B.carbon deposits in the lube oil
C.excessive centrifuging
D.excessive fuel dilution

最新试题

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()

题型:单项选择题

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()

题型:单项选择题

The treatment of the fuel oils involves storage, heating, filtering and()

题型:单项选择题

The shipboard oil pollution emergency plan will be invalid after ()

题型:单项选择题

The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

题型:单项选择题

When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

题型:单项选择题

()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

题型:单项选择题

The condensers located in various stages of a flash evaporator are cooled by()

题型:单项选择题

If separating effect is not good, which measure should be taken ()

题型:单项选择题

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()

题型:单项选择题