更多"To prevent the build up of high str"的相关试题:
[名词解释]Build-up-process（增层法）
[单项选择]A diesel engine is warmed up and white vapor is in the exhaust，this could indicate （）
A. excessive cylinder lubrication
B. a lugging engine
C. a leaking cylinder liner
D. overloading of one cylinder
[单项选择]The replacement piping for diesel engine high pressure fuel systems must be the same length and diameter as the original piping to （）.
A. avoid unnecessary pints inventory
B. keep torsional vibration constant
C. use existing supports and braces
D. maintain specified injection characteristics
[单项选择]Fuel has to be injected into the engine at a high pressure so that it （） correctly.
A. is purified
B. in timed
C. is compressed
D. atomizes
[单项选择]If a bilge pump failed to build up discharge pressure, you should check for （）.
A. excessive water in the bilges
B. a clogged suction strainer
C. oil in the bilges
D. All of the above
[单项选择]
Which of the following pumps will build up a bursting pressure or stall their motors if the discharge valves are closed?（）
(1) gear
(2) centrifugal
(3) screw
A. （1）and（2）
B. （1），（2）and（3）
C. （1）and（3）
D. （2）and（3）
[单项选择]A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
A. reduce the engine load
B. increase the cooling water flow
C. increase the lube oil pressure
D. adjust the fuel rack
[单项选择]The way to reduce （） is to build up a film of lubricant between any two surfaces that rub against each other.
A. friction
B. collision
C. inertia
D. resistance
[单项选择]In a diesel engine cooling system, the high temperature alarm contact maker will be activated on excessively high water discharge temperature from the （）
A. raw water pump discharge
B. expansion tank outlet
C. cooling water heat exchanger
D. outlet engine jacket water outlet
[单项选择]A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.
A. can’t be controlled very precisely
B. can’t be controlled as flexibly as the separate pump system
C. can be controlled as flexibly as the separate pump system
D. can be controlled more precisely and flexibly
[单项选择]While engine is in operation the piston moves up and down, thus causing the rotation of the （）.
A. crankcase
B. slipper
C. cam housing
D. crankshaft
[单项选择]High diesel engine cooling water temperatures can be caused by （）.
A. a worn water pump
B. not enough coolant
C. air in the cooling system
D. all of the above
[单项选择]In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.
A. increase its quality
B. obtain complete burning
C. reduce its weight
D. all of the above
[单项选择]How should you warm up a diesel engine that has not been run for some time? （）
A. Run it at minimum speed for a period of time
B. Run it at half speed for a period of time
C. Bring it to top speed immediately
D. Inject ether into the air intake
[单项选择]The is employed to warm up a large diesel engine before its starting（）
A. hot air
B. hot boiler water
C. cylinder water
D. hot seawater
[单项选择]In the process of the stand-by, warm-up the engine usually through give preheat of which parts of the diesel engine?（）
A. cooling water of the cooling system
B. fuel of the FO system
C. LO of the LO system
D. cooling water of the cooling system and LO of the LO system
[判断题]砌筑砂浆的强度等级为MU2.5、MU5、MU7.5、MU10和MU15。
[判断题]混凝土小型空心砌块的强度等级为MU7.5、MU10、MU20、MU5和MU15。
