The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than _____ of the total bilge pumping capacity.

A．one-third

B．two-thirds

C．one-fourth

D．two-fourths

[单选题]When fire pumps are used for other than firefighting service，each pipe connecting the other service (except for branch lines used for deck washing) must have a（）.A . check valve installed in the lineB . shut off valve at a manifold near the pumpC . q

[单选题]The fire drill must, as far as practicable, be conducted as if______.A．there is a minor emergencyB．there is an actual emergencyC．there were a minor emergencyD．there were an actual emergency

[单选题]The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.A . gearB . nonpositive displacementC . positive displacementD . rotary

[单选题]G．ear pumps are widely used to transfer any one of the following but .A．fuel oilB．lube oilC．hydraulic oilD．fresh water

[单选题]F．ire dampers prevent the fire spreading through the process ofA．convectionB．conductionC．radiationD．direct contact

[单选题]The brain is capable of ignoring pain message if __________to concentrate on other activities.A． allowing itB． it will allowC． allowed itD． it is allowed

[单选题]Lube oil pumps taking suction from the sump of most small marine engines are usually （）.A . of the diaphragm typeB . of the centrifugal typeC . of the positive displacement typeD . independently driven by electric motor

[判断题]The Forwarders Certificate of Transport is issued by the forwarder to theco

[判断题]The Forwarders Certificate of Transport is issued by the forwarder to theco

[单选题]第二组D．isplacement pumps are those where the volume of the pump chamber is alternately increased to draw the liquid in from the suction pipe and then decreased to force the liquid out into the delivery pipe. Centrifugal pumps are those wherein an impel