A. Boilers. B. Water-tube boiler. C. Fire-tube boiler. D. Steam.
A. Fire-tube boiler. B. Water-tube boiler. C. Exhaust boiler. D. Scotch boiler
A welding machine. B. A drilling machine. C. A grinding machine. D. A cutting machine.
A. It is leaking. B. It is broken. C. It is filled with oil. D. It is filled with sludge.油渣
A. Weld it up. B. Grind it. C. Disassemble and clean it. D. Send it to the shipyard.
A. He works as the chief engineer. B. He may be the 2nd engineer. C. He is a motorman. D. He will be the fourth engineer.
A. He is always careful. B. He always works together with others. C. He likes to work alone. D. He doesn't take the readings himself.
A. Take the readings. B. Watch the operation of the machines. C. Do some maintenance work. D. Have a rest.
A. He is helpful. B. He dislikes working with others. C. He is unhelpful. D. He is careless.
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