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航海英語燃燒與爆炸單項選擇題每日一練(2019.01.14)

單項選擇題
Automatic fire dampers in ventilation systems are operated by use of（）.
A.remotely operated valves
B.fusible links
C.C0₂ system pressure switches
D.heat or smoke detectors
單項選擇題
A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.
A.a low velocity spray applicator
B.a water spray or solid stream
C.at least two spray patterns of water
D.at least 25 psi delivered pressure
單項選擇題
Backfire flame arrestors are installed on（）.
A.fuel tanks
B.spark plugs
C.carburetors
D.distributors
單項選擇題
A carburetor is required to have a safety device called a(n)（）.
A.pressure release
B.backfire flame arrestor
C.automatic shut off
D.flow valve
單項選擇題
Automatic fire dampers in ventilation systems are operated by a（）.
A.remote operated valve
B.fusible link
C.CO₂ system pressure switch
D.heat or smoke detector

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