更多"Air gap is the vertical distance be"的相关试题:
[单项选择]The vertical distance between G and M is used as a measure of（）.
A. stability at all angles of inclination
B. initial stability
C. stability at angles less than the limit of positive stability
D. stability at angles less than the downflooding angle
[单项选择]（）is the vertical distance measured on the vessel’s side amidships from the load water line to the upper side of the freeboard deck or a point corresponding to it.
A. Buoyancy
B. Freeboard
C. Draft
D. Displacement
[单项选择]The height of a wave is the vertical distance（）.
A. from the still water plane to the crest
B. from the still water plane to the trough
C. from crest to trough
D. between water levels at one-quarter of the wave's length
[单项选择]A boundary between two air masses is a(n)（）.
A. lapse rate
B. isobar
C. front
D. continent
[单项选择]Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by （）.
A. a compressed packing gland
B. lantern tings between the packing rings
C. a liquid seal
D. the stuffing box gland
[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]GAP的颁布部门是（）
A. 全国人民代表大会
B. 全国人民代表大会常务委员会
C. 国务院
D. 国务院药品监督管理部门
[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]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]GAP是（）的缩略词
A. 良好农业规范
B. 良好生产规范
C. 危害分析与关键控制点
D. 卫生标准操作规范
[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]The quantity of cooled air delivered by an air conditioning unit should （） the sum of the quantity of air re-circulated to the unit and the quantity mechanically exhausted.
A. balance
B. not balance
C. be more than
D. be less than
[单项选择]（） supplies pilot air to control the cylinder air start valves.
A. An air compressor
B. An indicator cock
C. An air distributor
D. A safety valve
[单项选择]The air compressor pumps air to the （）.
A. air cylinder
B. combustion chamber
C. steam drum
D. expansion tank
