Why do fiberglass ductboard and flex duct have higher friction loss rates than sheet metal?
What will be an ideal response?
Fiberduct and flex duct are not as smooth and even on the inside, so they have higher resistance to airflow.
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Answer the following statement(s) true (T) or false (F)
1. Ladder logic is a good choice for a programming language because it closely resembles the way circuits are hard-wired. 2. The EXAMINE OFF instruction is only logically true when the device referenced is ON, or open. 3. When the N.C. symbol is programmed in a ladder diagram, any address that is actually ON becomes logically true and power can flow. 4. The number of times an input device can be addressed and used in a programmed circuit is limited to eight. 5. There are many more applications and circuits that normally require two- or three-pole devices that now only require single-pole devices when programmed for a PLC.
The joint reinforcement for CMU walls is made of longitudinal wires and cross wires. Which of these two wires are embedded in mortar and which are deformed?
What will be an ideal response?
Net income is the money you make after you pay for:
What will be an ideal response?
During panel lifting and bracing, only the erection team is allowed in the _____
a. danger zone b. boom swing arc c. controlled-access zone d. lifting perimeter