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

()you must improve your work()Ishall fire you.A. Either.. or.B. Neither... nor.C

[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]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

Cavitation of centrifugal pumps may be caused by ____A. high speed water passing

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

[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

—_____________________ — Fire, fire service please! Theres a huge fire here.A. 9