A.at least annually
B.whenever it is below its required weight
C.only if the extinguisher has been used
D.before every safety inspection
您可能感興趣的試卷
你可能感興趣的試題
A.a continuous ringing for 10 seconds
B.one short ring followed by one long ring
C.two long rings of at least 20 seconds
D.a continuous ringing until the fire is extinguished
最新試題
Blocking open or removing fire dampers can cause（）.
Backfire flame arrestors are installed on（）.
According to the T-Boat regulations the reason for providing adequate ventilation for a battery storage area is to prevent（）.
During the required periodic abandon ship drill aboard a ship，each person not assigned duties in the muster list is（）.
Convection spreads a fire by（）.
A fire in electrical equipment should be extinguished by using（）.
Each fire pump on a ship must have a pressure gauge located at（）.
On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.
Dry chemical fire extinguishers are effective on which type(s) of fire?（）
Each part of the fire-main system located on an exposed deck must be（）.