更多"A sight glass is installed in the l"的相关试题:
[单项选择]A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.
A. high pressure liquid line
B. low pressure liquid line
C. high pressure vapor line
D. low pressure vapor line
[名词解释]视线关系（Line of Sight，LoS）
[单项选择]The water level in the gauge glass when a boiler is operating is （） when the boiler is shut down.
A. lower than
B. higher than
C. below
D. equal to
[多项选择]LOS（Line-of-sight）计算中，计算结果与哪些因素有关（）
A. 发射点（天线）位置
B. 天线距地面高度
C. 接收点（天线）位置
D. 地貌情况
[单项选择]When the current in a power transmission line is increased, the power loss （）
A. increases as the square of the current
B. decreases as the square root of the current
C. remains the same, as it is independent of current flow
D. increases in direct proportion as the current
[单项选择]The（）is fitted in the main steam supply line and is usually of the non-return type.
A. main steam stop valve
B. auxiliary steam stop valve
C. feed check or control valve
D. blow down valve
[单项选择]I am ready（）tow line.
A. cast
B. to cast of
C. cast off
D. to cast off
[单项选择]I have（）below water line.
A. the leaked
B. leakage
C. leaking
D. leak
[单项选择]I have（）damage below water line.
A. large
B. big
C. important
D. major
[单项选择]I tried（） but the line was engaged.
A. phone
B. phoned
C. phoning
D. to phone
[单项选择]The purpose of the tripping line on a sea anchor is to（）.
A. Aid in casting off
B. Direct the drift of the vessel
C. Aid in its recovery
D. Maintain maximum resistance to broaching
[单项选择]A liquid sight flow indicator in a refrigeration system is examined and gas bubbles are noted in motion with the fluid flowThis means （）.
A. the system is fully charged
B. there is air leaking in from the condenser
C. ice crystals are forming in the refrigerant
D. the system contains less than a full charge of refrigerant
[单项选择]If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.
A. too much refrigerant in the system
B. oil entrained in the refrigerant
C. less than a full charge of refrigerant in the system
D. ice crystals forming in the refrigerant
[单项选择]In working out a local apparent noon sight for your latitude，you subtract the Ho from 90°. The 90°represents the angular distance from（）.
A. the equator to the elevated pole
B. your horizon to your zenith
C. your zenith to the elevated pole
D. the geographical position of the Sun to the elevated pole
[单项选择]By day，you sight a vessel displaying three shapes in a vertical line. The top and bottom shapes are balls，and the middle shape is a diamond. It could be a（）.
A. vessel trolling
B. mineclearing vessel
C. trawler
D. vessel engaged in replenishment at sea
[单项选择]“D/Pafter sight”是指（）
A. 即期付款交单
B. 远期付款交单
C. 承兑交单
D. 承兑远期汇票
[单项选择]Compared to manila line,size for size, nylon line（）.
A. has less strength than manila line
B. has more strength than manila line
C. is equivalent to manila line
D. will rot quicker than manila line
[单项选择]By night，you sight the lights of a vessel engaged in underwater operations. If an obstruction exists on the port side of the vessel，it will be marked by（）.
A. a floodlight
B. two red lights in a vertical line
C. a single red light
D. any visible lights
