If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).A.a broken shaft on the freshwater pumpB.an excessive accumulation of scale in the heat exchangerC.an incorrect thermostatic elem
题目
If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).
A.a broken shaft on the freshwater pump
B.an excessive accumulation of scale in the heat exchanger
C.an incorrect thermostatic element operating range
D.lube oil in the cooling water
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第1题：
CO2 extinguishes a fire by __________.
A.a blanket of bubbles formed on the surface of the fire
B.smothering
C.isolating the heat from the fuel
D.cooling
正确答案：B
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第2题：
The boy lay in the street，his eyes_______and his hands______.A.closing;trembling
B.closed;trembled
C.closing;trembled
D.closed;tremblin答案：D解析： -
第3题：
柴油机的燃料“Diesel”是以发明人名字命名的
正确 -
第4题：
The boy lay in the street，his eyes_______and his hands______．A.closing；trembling
B.closed；trembled
C.closing；trembled
D.closed；trembling答案：D解析： -
第5题：
5、定压加热循环（Diesel循环）适用于高速柴油机。
错误 -
第6题：
10、柴油机的燃料“Diesel”是以发明人名字命名的
正确