A.worn valve seats
B.worn main bearing
C.excessive valve clearance
D.weak rocker arm springs
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A.spark from a plug in the pre-combustion chamber
B.electrical discharge from the distributor
C.heat of compression within the cylinder
D.heat from the fuel injection nozzle
A.engine operating speed
B.an air manifold
C.a hydraulic distributor
D.individual cams and valve gear
A.the air start valve timing gears and rods
B.a cylinder check valve
C.individual cams and valve gear
D.an air manifold poppet valve
A.degree of cylinder air turbulence
B.firing pressure in the engine
C.quality of fuel to be injected
D.duration of the ignition delay period
A.laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two places
B.measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution
C.rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottom
D.taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation
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During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
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
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The condensers located in various stages of a flash evaporator are cooled by（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
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Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The ISPS Code consists of a mandatory section-Part A, which shows（）