單項(xiàng)選擇題A portable foam fire extinguisher is placed in operation by（）

A.turning it upside down
B.pressing the foam lever
C.squeezing the grip handle
D.opening the hose valve


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題Before you begin administering artificial respiration, you should be sure the victim（）

A.is comfortable
B.is warm
C.is not bleeding
D.has a clear airway

2.單項(xiàng)選擇題If liquid freon should come in with your skin, you should （）

A.wash with salt water
B.wash with sterile mineral oil
C.treat it like frostbite
D.treat it like any burn

3.單項(xiàng)選擇題If the effective bearing area has been reduced , remedial action should be taken（）

A.by more than 5 percent
B.by less than 10 percent
C.to 95 percent
D.to less than 90 percent

4.單項(xiàng)選擇題Main diesel engine control can be obtained by the bridge （）

A.at any time
B.only after the engine room control station is switched to ‘bridge control’
C.whenever the secondary station is switched to ‘bridge control’
D.whenever the engine side control station is switched to ‘bridge control’

5.單項(xiàng)選擇題The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）

A.one half crankshaft speed in a two-stroke cycle diesel engine
B.crankshaft speed in a two-stroke cycle diesel engine
C.two times crankshaft speed in a two-stroke cycle diesel engine
D.one-fourth times crankshaft speed in a four-stroke cycle diesel engine

最新試題

Diesel engine air start system check valves are opened by （）

題型：?jiǎn)雾?xiàng)選擇題

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

題型：?jiǎn)雾?xiàng)選擇題

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

題型：?jiǎn)雾?xiàng)選擇題

（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

題型：?jiǎn)雾?xiàng)選擇題

Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）

題型：?jiǎn)雾?xiàng)選擇題

If separating effect is not good, which measure should be taken （）

題型：?jiǎn)雾?xiàng)選擇題

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

題型：?jiǎn)雾?xiàng)選擇題

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

題型：?jiǎn)雾?xiàng)選擇題

When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

題型：?jiǎn)雾?xiàng)選擇題

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）

題型：?jiǎn)雾?xiàng)選擇題