轮机英语试题十九.doc

试题十九 单项选择题： The lower section of a piston is called the ______.A. land B. skirt C. crown D. plate Which cause of the following can lead to the engine not to start on air? A. starting air pressure too high B. correct timing of starting air valves C. three of the starting valves stuck D. the turning gear disengaged Which of the following can be obtained by means of an indicator card? A. the peak pressure in a cylinder. B. the temperature of the cooling water. C. the fuel consumption. D. none of the above. Expansion tank should be used to remove ______from cooling water. A. scale B. sludge C. chemicals D. air Cracks in the cylinders and cylinder covers may result from ______.A. low speed B. unequal heating C. less lubricating D. low charge air pressure A lube oil filter can be used to remove most contaminants from lube oil. A contaminant which will remain in the lube oil after filtering is ______.A. abravise B. fuel oil C. sediment D. impurities A ship designed for carrying goods requiring refrigeration is called_____. A. REEFER B. RO/RO SHIP C. CONTAINER D. TANKER ______is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve. A. An air receiver B. An operating valve C. An automatic valve D. An air distributor ______in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit compressed air to start the engine. A. Because B. Owing to C. For D. No matter The pressurized air is usually cooled to increase the charge air ______.A. viscosity B. density C. velocity D. electricity Load control on a diesel engine is accomplished by ______.A. regulating the speed of the turbocharger B. rotating the fuel injector pump plunger C. regulating the speed of the fuel oil transfer pump