Which information is not given in the text？
A. Ship recycling contributes to sustainable development
B. The IMO believes that making an international instrument to regulate the ship recycling process is urgently in need
C. An international convention on ship recycling has been adopted
D. The IMO has taken action to develop an effective solution to the problem of ship recycling
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The expansion valve used in a refrigeration system regulates the
A. superheat of the gas leaving the compressor
B. back pressure in the evaporator
C. temperature in the refrigerated space
D. degree of superheat of the gas leaving the evaporator
Which statement is NOT true？
A. In a simple vane pump, the rotor and cam ring are exactly concentric
Balanced vane pump has an elliptical cam ring
C. Liquid in both gear pump and vane pump are forced out to the outlet.
D. Balanced vane pumps can work at a higher pressure than the simple vane pump
The bridge should inform the engine room______before passing through congested or shallow
A. 24 hours
B. 2 hours
C. 1 hour
D. 15 minutes
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