The opening or closing of the cylinder starting valve is controlled by （）.

[单选题]Opening of the cylinder （） will admit compressed air into the cylinder.A . safety valveB . indicator cockC . blow-down valveD . start valve

[试题](b) Calculate the value of the closing stocks of finished goods at the end of the three-month period, and the valueof cost of sales for the period. (3 marks)

[单选题]The cylinder head, cylinder liner and （） form the combustion chamber.A . frameB . pistonC . crankcaseD . explosion plate

[单选题]（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.A . The fuel oilB . The lube oilC . The sea waterD . The fresh water

[单选题]Cracks in cylinder and cylinder covers may （） from unequal heating.A . makeB . causeC . resultD . produce

[单选题]The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.A．large conical springsB．compressed air pressureC．hydraulic pressureD．exhaust gas pressure

[主观题]why is quick closing valves important to in engine room machineries ?how are they operated ?

[单选题]The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.A . direct action of cam shaftB . compressed air pressureC . hydraulic “push rods”D . direct action of the main piston movin

[问答题]Would you mind closing the window for me?

[问答题]Would you mind closing the window for me?