When are fiberboard duct systems are typically sealed? What material is used to secure the joints? Why is the possibility of air leakage low with these systems?
What will be an ideal response?
Fiberboard duct systems are typically sealed as the sections are connected to each other. Reinforced duct tape is used to secure the joints and, because the fiberglass sections butt up against each other during installation, the possibility of air leakage is very low.
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List various exterior wall finishes used in wood light-frame buildings. Which of these finishes are unique to (wood or steel) light-frame buildings?
What will be an ideal response?
In a simple circuit, 2 mA flows through a 12 k? resistor. The applied voltage is
A) 12 V B) 24 V C) 240 V D) 2.4 V
The MOD number of a Johnson counter always equals one-half the number of flip-flops in the counter
Indicate whether the statement is true or false
Which of the following is a condition of an air conditioning system that is undercharged?
A. increased possibility of floodback to the compressor B. higher operating pressures C. low operating pressures D. reduced evaporator superheat