更多"Air chambers are usually fitted to "的相关试题:
[单项选择]An overspeed safety device is usually fitted to a generator engine for （） in the event of overspeed.
A. cutting power off the engine
B. increasing the fuel pump setting
C. braking the crankshaft
D. stabilizing the ship speed
[单项选择]A reciprocating air compressor is running roughly and vibrating excessively, indicating that the （）.
A. compressor is overloaded
B. motor is overloaded
C. foundation bolts are loose
D. belts are too tight
[单项选择]Bad valves operation of the reciprocating air compressors can be detected by observation of （）.
A. the discharge temperature low
B. the discharge temperature high
C. the discharge pressure rise
D. the inter-stage pressure low
[单项选择]If a reciprocating air compressor has a knock occurring in frequency with its operating RPM, the cause is probably （）.
A. misalignment or worn main bearings
B. insufficient cylinder lubrication
C. defective or poorly fitted valves
D. all of the above
[单项选择]The air reservoirs must have （） fitted to prevent rupture in the event of fire.
A. high pressure alarm
B. fire alarm
C. extinguishers
D. fusible plugs
[单项选择]（） usually helps to induce air movement to assist combustion.
A. Cylinder cover
B. Main bearing
C. The exhaust valve
D. The piston movement
[单项选择]（） or air venting arrangement is fitted to the fuel supply passage.
A. An air pump
B. A compressor
C. A fuel pump
D. A priming
[单项选择]The pressurized air is usually cooled to increase the charge air （）.
A. viscosity
B. density
C. velocity
D. electricity
[单项选择]The starting air system usually has （） to prevent starting if anything is not in order.
A. drain cocks
B. vent valves
C. counteracts
D. interlocks
[单项选择]Usually we take the cooling effect of the air flown through the cylinder during the overlap period as（）
A. inevitable
B. harmful
C. helpful
D. unacceptable
[单项选择]Low pressure air is usually taken through （） or pressure regulators to a low pressure reservoir supplying a ring main through driers.
A. globe valves
B. butterfly valves
C. gate valves
D. reducing valves
[单项选择]The pressure of pilot air is usually （） than that of starting air.
A. higher
B. lower
C. low
D. high
[单项选择]Air cocks, usually positioned at the （） in a circulating system, is used to get rid of the air in the system.
A. bending joint
B. expansion tank
C. weld
D. the highest point
[单项选择]Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.
A. using a slightly dirty air filter
B. using oil having an excessive viscosity
C. intercooler or after-cooler leaks
D. carrying the oil level higher than normal
[单项选择]If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
A. the relief valve should open before the high pressure cutout
B. the relief valve should open and allow the excess refrigerant to flow to the receiver
C. the high pressure cutout switch should operate before the relief valve opens
D. you should close in on the suction valve
[单项选择]When starting a reciprocating pump, the inlet valve should be （）.
A. closed
B. opened fully
C. cracked open
D. partly open
[单项选择]Before starting a reciprocating, steam-driven pump that has been idle for a period of time, you should （）.
A. open the steam line mot valve
B. drain the steam cylinder
C. close the steam cylinder drains
D. open the liquid cylinder drains
[单项选择]The amount of fluid delivered by a reciprocating pump can be regulated by （）.
A. throttling the pressure line
B. changing the speed of the piston
C. either A or B
D. None of the above is tree
