更多"Data relating to the direction and "的相关试题:
[单项选择]The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
A. temperature
B. density
C. deflection
D. speed
[名词解释]脐腐症 blossom-end rot
[单项选择]High-velocity fog（）.
A. is a finer，more diffuse water spray than low-velocity fog
B. requires that the water pressure be no greater than 60 psi
C. produces an effective fog pattern no more than 6 feet beyond the nozzle
D. extinguishes a fire by absorbing heat and reducing the supply of oxygen
[单项选择]Which method is used to detect rot in manila lines?（）
A. Feeling the surface of the line for broken fibers
B. Measuring the reduction in circumference of the line
C. Observing for the appearance of mildew on the outer surface
D. Opening the strands and examining the inner fibers
[单项选择]PLC功能指令ROT的功能是（）。
A. 代码转换
B. 旋转控制
C. 逻辑乘数据传送
D. 二进制译码
[单项选择]The piston moves up and down, thus causing the rotational movement of the（）
A. crankshaft
B. connecting rod
C. cross-head
D. main beating
[单项选择]If a firefighting situation calls for low-velocity fog you would（）.
A. order the engine room to reduce pressure on the fire pump
B. put the lever on an all-purpose fire nozzle all the way forward
C. attach a low-velocity fog applicator with the nozzle shut down
D. put the lever on an all-purpose fire nozzle all the way back
[单项选择]In a turbocharger, inlet air velocity is increased in the（）.
A. inlet nozzle ring
B. stationary diffuser passages
C. compressor outlet volute
D. rotating impeller vanes
[单项选择]The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the （）
A. inlet nozzle ring
B. turbine wheel blade
C. diffuser passages
D. inlet vol
[单项选择]The velocity of the current in large coastal harbors is（）.
A. predicted in Tidal Current Tables
B. unpredictable
C. generally constant
D. generally too weak to be of concern
[单项选择]The rising velocity of the globules carries them upwards where they become trapped by the under surfaces of plates and （）until the enlarged globules have sufficient rising velocity to travel along the plate surface and break away at periphery.
A. disperse
B. coalesce
C. compress
D. shrinkage
[单项选择]In order to detect rot in manila lines，you should（）.
A. feel the surface of the line for broken fibers
B. measure the reduction in circumference of the line
C. observe any mildew on the outer surface
D. open the strands and examine the inner fibers
[单项选择]The velocity of a rotary tidal current will be decreased when the Moon is（）.
A. at apogee
B. new
C. full
D. All of the above
[单项选择]When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.
A. pressure builds up in the nozzle which causes a surge of water
B. the only opening in a passageway is the one from which the nozzle is being advanced
C. pressure in the fire hose drops below 100 psi
D. a bulkhead collapses due to heat and pressure
[单项选择]Distress traffic（）all messages relating to the immediate assistance required by the ship in distress, including search and rescue communications and signals for locating.
A. consists of
B. is consisted of
C. consisted of
D. are consisted of
[单项选择]If not attached to the nozzle,each low-velocity spray applicator on a vessel must be stowed（）.
A. in a protected area on the main deck
B. inside a machinery space near the entrance
C. next to the fire hydrant to which the fire hose is attached
D. on a rack inside the quarters near the entrance
[单项选择]The 12-foot low-velocity fog applicator（）.
A. has a spray pattern 12 feet in diameter
B. can be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzles
C. has a 90°bend at its discharge end
D. has a screw thread end which connects to the all-purpose nozzle
