单选题If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）Aa low level in the engine expansion tankBexcessively high coolant pressureCimproper temperaturesDmalfunctioning of the jacket water heater
单选题
If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）
A
a low level in the engine expansion tank
B
excessively high coolant pressure
C
improper temperatures
D
malfunctioning of the jacket water heater
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