Chilled water systems use a primary refrigerant to remove heat from a secondary refrigerant in a chiller unit. What is the secondary refrigerant in such systems?
A) R-22
B) Water
C) R-134A
D) Ammonia
Ans: B) Water
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A dielectric test set often used for testing capacitors is generally referred to as a ____ because of its ability to produce a high voltage or high potential.
A. DIVOLT B. DIPOT C. HIPOT D. HIVOLT
Which of the following has the advantage of being resistant to shock and vibration and is commonly used for the I/O track of a programmable controller?
a. Solid-state relay b. Mechanically held relay c. Bimetallic overload relay d. Thermal overload relay
As part of changes to the calendar after September 22, 1792, the Convention divided each of twelve months into which of the following?
a. four weeks of eight days b. three weeks of ten days c. five weeks of six days d. six weeks of six days
What type of instrument would you use to generate temperatures in excess of 212 degrees Fahrenheit?
What will be an ideal response?