<samp id="nrejb"><listing id="nrejb"><var id="nrejb"></var></listing></samp>

<li id="nrejb"></li>

單項選擇題

In a diesel engine cooling water system, a pH of 60 indicates a/an （）.

A.slightly acidic condition
B.slightly alkaline condition
C.overtreatment of water
D.neutral condition of water

你可能感興趣的試題

單項選擇題

Which of the following statements concerning fire-tube boilers is correct?（）

A.Combustion gases flow through the tubes
B.Flames impinge on the tubes
C.Combustion occurs in the tubes
D.Water flows through the tubes

單項選擇題

A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.

A.slight acidity
B.slight alkalinity
C.excessive alkalinity
D.excessive acidity

<table id="pvgup"><wbr id="pvgup"><center id="pvgup"></center></wbr></table>

<tr id="pvgup"><sup id="pvgup"></sup></tr>