The self-contained breathing device should not be used in which situation().
- AOxygen deficient spaces
- BCompartments containing poisonous vapors
- CFighting fires that produce heavy smoke
- DUnderwater search
The self-contained breathing device should not be used in which situation().
1、●In the following, the input device is
●In the following, the input device is _(72) .(72)A keyboardB monitorC printerD plotter
2、A self-contained breathing apparatus i
A self-contained breathing apparatus is used to().Amake underwater repairs to bargesBdetermine if the air in a tank is safe for menCenter areas that may contain dangerous fumes or lack oxygenDresuacitate an unconscious perso
3、Which of the motors for the devices li
Which of the motors for the devices listed below is fitted with an instantaneous overload relay?()AFanBPumpCWinchDMachine tool
4、The device used for preventing the pas
The device used for preventing the passage of flames into enclosed spaces is called a ().Aflame relief valveBflame stopperCsafety valveDflame arrester
5、Emergency escape breathing device on b
Emergency escape breathing device on board shall have a duration of service no less than().A20 minutesB15 minutesC10 minutesD5 minute
6、The device, which is installed in the
The device, which is installed in the compressor suction line to prevent liquid from entering the compressor when hot gas defrosting, is called a()Are-evaporatorBreceiverCdehydratorDsolenoid