Scientists are not sure how serious the effects of global warming will be.A．Right B．

Why is it necessary to warn engine room personnel before activating the fixed CO2 system？

A.To make them aware there is a fire

B.To let them know they should leave the engine room

C.To prevent possible injury from frostbite

D.To make them aware that ventilation will automatically stop

A.Fixed CO2, semi-portable CO2, then hand portable CO2

B.Semi-portable CO2, fixed CO2, then hand portable CO2

C.Hand portable, semi-portable CO2, then as a last resort the fixed CO2 system

D.Hand portable, fixed CO2, then as a last resort the semi-portable CO2

A.actuate an alarm and open the engine room control valve

B.actuate an alarm and open the engine room CO2 releasing valve

C.open the engine room control valve and shut off engine room ventilation fans

D.open the engine room control valve and then the CO2 releasing valve

A.The fire pump should be started

B.The boiler rims should be secured

C.The fixed CO2 system should be initiated into action

D.The engine room ventilation should be secured

Operation of the valve control release on a fixed CO2 system must immediately ______.

A.release CO2 to the protected space

B.secure all mechanical ventilation in the protected space

C.sound the rig’s general alarm signal for a fire

D.sound an alarm in the ballast control room

Fixed CO2 systems would not be used on crew’s quarters or ______.

A.the paint locker

B.spaces open to the atmosphere

C.cargo holds

D.the engine room

A.Make an entry in the official logbook

B.Open the master control valves on the fixed CO2 system

C.Start the fire pump and check discharge pressure

D.Secure auxiliary condenser overboard discharge

David: Could you have my car fixed before noon, please？ Clerk: ______

A．Sure. The damage is minor.

B．Sure. I'll fasten it fight here.

C．Yes. It's only a matter of time before it breaks down.

D．Yes, I'll have your car.

A.as close to the main engine as possible

B.as close to the main pump as possible

C.just before the fuel valve

D.just before the booster pump