更多"Some cranes are mounted in pairs on"的相关试题:
[单项选择]The safety valves are mounted in pairs to （） the boiler against overpressure.
A. use
B. release
C. protect
D. effect
[单项选择]Some TV programs are interesting but some others are（）and full of violence.
A. frightening
B. frightened
C. to be frightening
D. to be frightened
[单项选择]（） are mounted in pairs to protect the boiler against overpressure.
A. Safety valves
B. Water tubes
C. Steam stop valves
D. Blow down valves
[单项选择]In some type of two-stroke engines, besides some small holes for（）, starting valve, safety valve, indicator cock, and central opening in each cylinder cover for mounting the（）
A. fuel valves；exhaust valve
B. exhaust valves；inlet valve
C. fuel valves；inlet valve
D. exhaust valves；fuel valve
[单项选择]For some years after his graduation, he（）some of his classmates, but as times went by, he dropped them one by one
A. caught up with
B. kept in touch with
C. kept up
D. made up with
[单项选择]Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）
A. activate the driers
B. change color
C. secure the compressor
D. add a predetermined amount of liquid drier
[单项选择]Some chloronated flourocarbon refrigerants may decompose into a toxic irritating gas if it is （）.
A. stored at temperatures below 60 degrees Fahrenheit
B. charged into a system having copper fittings
C. allowed to mix with compressor oil
D. exposed to an open flame or hot surface
[单项选择]A vessel which through some exceptional circumstance is unable to maneuver as required by these Rules and is therefore unable to keep out of the way of another vessel is called（）.
A. a vessel restricted in her ability to maneuver
B. a vessel not under command
C. a vessel engaged in fishing
D. a vessel constrained by her draught
[单项选择]Some architectural designs are better than（）
A. others
B. another
C. the other
D. the rest
[单项选择]There are some navigational instruments（）.
A. in bridge
B. on the deck
C. in the radio room
D. on the hold
[单项选择]There is some（）space inside.
A. torn
B. broken
C. crushed
D. damaged
[单项选择]Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?（）
A. The chromium will not wear out the piston rings
B. The chromium strengthens the liners in the way of the scavenging air ports
C. Chromium eliminates the need for oil scraper rings
D. Pores in the plating aid in maintaining the lube oil film
[单项选择]Anchor capstans are used in some installation where the cable lifter rotates about a （）.
A. horizontal axis
B. crankshaft
C. vertical axis
D. camshaft
[单项选择]Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）
A. increase blow-by in all cylinders
B. incomplete combustion in all cylinder
C. overloading in all cylinders
D. insufficient fuel delivery to all cylinders
[单项选择]Some vessels are equipped with a water lubricated stern robeWhen at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be （）.
A. closed, and no leakage permitted across the shaft packing
B. closed, and only slight leakage permitted across the shaft packing
C. open, and no leakage permitted across the shaft packing
D. open, and only slight leakage permitted across the shaft packing
[单项选择]A tropical storm is building strength some distance from your ship. Waves are coming from the east，with periods increasing from 5 seconds to 15 seconds. The swell is from the east. Where was the storm when these new swells were generated? （）
A. To the north of you
B. To the south of you
C. To the east of you
D. To the west of you
[单项选择]The most common source of excitation for synchronous motors is a/an （）.
A. low voltage battery
B. motor attenuator set
C. DC exciter generator
D. AC supply
[单项选择]In some schools children who prefer to read books rather than（）football become social outcasts (被抛弃者).
A. play
B. playing
C. to play
D. to playing
[单项选择]Before the final examination, some students have shown（）of tension. They even have trouble in sleeping.
A. anxiety
B. marks
C. signs
D. remarks
