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单选题
Exhaust pyrometer readings provide an indication of the （）
A
effectiveness of water-cooled exhaust elbows
B
distribution of the load between engine cylinders
C
amount of fuel penetration into the engine cylinders
D
indicated horsepower of the engine cylinders
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单选题Which of the following condition is likely to develop if the thermocouple element of a pyrometer becomes coated with excessive amounts of combustion by-products?（）A
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单选题Which of the general advantages listed does the electrical pyrometer have over the mechanical pyrometer?（）A
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单选题In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low alloy steels because （）.A
the beveled edges of the intake valves provide for serf-centering during seatingB
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单选题An indication of an overloaded main propulsion diesel engine is （）A
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