更多"Which condition indicates the air s"的相关试题:
[单项选择]Which condition indicates that your radar needs maintenance?（）
A. Serrated range rings
B. Indirect echoes
C. Multiple echoes
D. Blind sector
[单项选择]Which condition indicates that you are in a hurricane’s dangerous semicircle in the Northern hemisphere（）.
A. A backing wind
B. A veering wind
C. A norther
D. A strong，gusty wind
[单项选择]On which side（）I rig the pilot ladder.
A. will
B. can
C. shall
D. may
[单项选择]Captain, do you know which side shall we get（）?
A. beside
B. alongside
C. upon
D. side
[单项选择]The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the（）.
A. precipitation point
B. vapor point
C. dew point
D. absolute humidity
[单项选择]To add refrigerant to the low side of an air conditioning system, the refrigerant should be introduced through the （）
A. suction service valve as a vapor
B. suction service valve as a liquid
C. discharge service valve as a vapor
D. charging valve as a liquid
[单项选择]To add refrigerant to the high side of an air conditioning system, you should introduce the refrigerant through the （）.
A. discharge service valve as a vapor
B. suction service valve as a liquid
C. charging valve as a liquid
D. condenser purge valve as a vapor
[单项选择]A person may operate an air compressor in which of the following areas on board a tank barge?（）
A. Pumproom
B. Generator room
C. A space adjacent to a cargo tank
D. A space two meters from a cargo valve
[单项选择]When compared to air temperature,which factor is most useful in predicting fog?（）
A. Vapor pressure
B. Dew point
C. Barometric pressure
D. Absolute humidity
[单项选择]Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?（）
A. The pump delivers full capacity when started, but gradually slackens off toan abnormally low flow
B. The pump packing gland overheats after short operating periods
C. The motor over-current protective device continually shuts the pump down
D. Pounding noises can be heard at the pump suction chest
[单项选择]The minimum concentration of a vapor in air which can form an explosive mixture is called the（）.
A. auto-ignition point
B. flash point
C. lower explosive limit (LEL)
D. threshold limit value (TLV)
[单项选择]Which of the files listed is tapered on three sides and is used to file acute internal angles?（）
A. Mill
B. Round
C. Square
D. Triangular
[单项选择]Which of the following problems could cause air to blow out through the inlet air filter of a running compressor?（）
A. Excessive compression in the cylinder
B. A broken intake valve
C. A dirty inlet filter element
D. An improperly adjusted discharge valve
[单项选择]The side of a ship which is farther from the winds is（）.
A. fairway side
B. open sea side
C. lee side
D. roadstead side
[单项选择]Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A. Flashing
B. Quick flashing
C. Composite group flashing
D. Equal interval (isophase)
[单项选择]Air compressors are NOT permitted in which space(s) on a tank barge carrying grade A cargo?（）
A. A cargo handling room
B. A space in which cargo hose is stored
C. An enclosed space containing cargo piping
D. All of the above
[单项选择]A lashing used to secure two barges side by side，lashed in an "X" fashion，is called a （）.
A. quarter line
B. back line
C. peg line
D. jockey line
[单项选择]A tow astern is veering from side to side on its towline. The best way of controlling the action is to（）.
A. trim the tow by the bow
B. trim the tow by the stern
C. list the tow to windward
D. adjust the length of the towing bridle
