A pH scale of 7 indicates a neutral solution as pure water. What does the pH scale tell you?
What will be an ideal response?
Acidity or alkalinity
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An optional item of equipment used to recover about 60 to 80 percent of the energy contained in the air exiting a system and to deliver the energy to the incoming air is a(n) _____.
a. ERV/HRV b. evaporative pre-cooler c. bypass humidifier d. economizer
What is the maximum size of fillet weld that can be deposited in a single pass of the electrode?
What will be an ideal response?
When the electric motor is acting as a generator it produces alternating current (AC). This current is converted to direct current (DC) by use of __________
A) Large diodes B) Special AC batteries C) Large capacity filters D) None of these
How are notary republics being used online to verify signatures?
What will be an ideal response?