更多"The quantity of cooled air delivere"的相关试题:
[单项选择]Under normal conditions, the quantity of air circulation becomes less and less.What is the reason?（）
A. dirty delivery ducts
B. too much refrigerant
C. the fouling filters
D. high temperature outside
[单项选择]Air entering an air-cooled refrigeration system is indicated by （）.
A. frosting of the liquid line
B. higher than normal head pressure
C. a clear sight glass
D. abnormally cold reefer boxes
[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 compressor in an air-cooled condensing refrigeration system is short cycling on the high pressure cutout switch（）
A. system is overcharged with refrigerant
B. system is low on refrigerant
C. discharge valves are leaking excessively
D. discharge valves are leaking slightly
[单项选择]If the goods are not delivered，or delivered in a damaged condition，a claim may be （）within a period of certain years unless there is a clause to the contrary in the charter-party or bill of lading.
A. taken
B. gone
C. gotten
D. made
[单项选择]On engines having oil cooled pistons the lubricating oil pre-heater must be put into operation and the rate of heating so （） that the temperature of the piston cooling oil returns are 32℃ to 35℃ over a period of at least two hours.
A. slow
B. quick
C. arranged
D. high
[单项选择]The refrigeration compressor in a water cooled refrigeration system is short cycling on the high pressure cutout switch， One reason for this could be the （）.
A. system is low on refrigerant
B. high pressure cutout switch is improperly adjusted
C. discharge valves are leaking slightly
D. discharge valves are leaking excessively
[单项选择]Injectors on modern engines are cooled by a combination of the intensive bore cooling in the cylinder by a combination of the intensive bore pockets and by the fuel which is re-circulated through the injector when the follower is on the （）of the cam or when the engine is stopped.
A. slope
B. base
C. top
D. bottom
[单项选择]Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to （）.
A. maintain adequate coil back pressure
B. prohibit flashing in the liquid line
C. reduce refrigerant volume in the system
D. reduce compressor discharge line loading
[单项选择]The pistons are cooled by oil supplied from the forced （） system.
A. fresh water
B. sea water
C. lubrication
D. fuel oil
[单项选择]Air receivers installed in starting air systems are to be （）.
A. cylindrical in shape with service connections located at the top and bottom
B. opened and made available for inspection during biannual inspections provided
C. with automatic drain traps for the removal of moisture
D. so installed as to make the drain connections effective under extreme conditions of trim
[单项选择]Compressed air is supplied by air compression to （）.
A. the air receivers
B. the starting valves
C. the cylinder covers
D. the distributors
[单项选择]Air line lubricators are used in compressed air systems to lubricate （）.
A. the suction and discharge valves
B. tools and equipment served by compressed air
C. air line reducing valves
D. all of the above
[单项选择]Air conditioning is the process of treating air to control （） its temperature, humidity, cleanliness and distribution to meet the comfort requirements of the occupants of the conditioned space.
A. instantaneous
B. instantaneously
C. simultaneous
D. simultaneously
[单项选择]In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be （）.
A. superheated
B. saturated
C. condensed
D. convected
[单项选择]How are VTP advertisements delivered to switches across the network?（）
A. anycast frames
B. multicast frames
C. broadcast frames
D. unicast frames
[单项选择]The pistons are cooled by （） oil from the forced lubrication.
A. being given
B. giving
C. supplying
D. being supplied
[单项选择]The main engine is cooled with fresh water （）is added suitable small quantities of chemicals to prevent corrosion.
A. in which
B. on which
C. to which
D. by which
