Name the three modes of heat loss from a greenhouse and measures which might be taken in an existing greenhouse to reduce each
What will be an ideal response?
1) Conduction loss can be reduced by lowering the inside to outside
temperature differential through such measures as a second covering on the
greenhouse (usually polyethylene), a thermal screen, or the use of a low energy
radiant heat system. 2) Infiltration loss is reduced by sealing leaks. These.
measures include lap sealants, covering exhaust fans, repairing broken and
cracked glass, reglazing leaky greenhouses, and weather stripping on doors and
ventilators. 3) Radiation loss is reduced by using a layer of material opaque to
radiant energy as a thermal screen and by using film plastic with radiant heat
block.
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Equipment used to move nonfluid material within a process facility includes:
a. Environmental control equipment b. Solids handling equipment c. Separation equipment d. Auxiliary equipment
The areas around an emergency incident are divided into three zones, which are the ________________, _________________ and ________________.
Fill in the blank(s) with the appropriate word(s).
When should gauges be installed on small sealed systems?
A) Whenever the system is checked B) Only when other diagnostic means have been exhausted C) Monthly to ensure the charge is still correct D) Routinely, at least every year
What term describes an electrical device controlled by an electronic module that performs some kind of mechanical action?
A) Driver B) Activator C) Actuator D) None of these