Electric heat tracing of pipe is done for freeze protection and _____.
a. to eliminate pipe maintenance
b. to eliminate standard thermal insulation
c. to provide a grounding conductor
d. for temperature maintenance of process fluids
d. for temperature maintenance of process fluids
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Under normal working conditions, support for the strands of a wire rope is provided by the _____.
a. sheath b. core c. wire d. coating
The Handbook of Chemistry and Physics, 57th Edition (1976?1977), lists on pages D?61 to D?63, a section on the thermodynamics properties of the elements. These include an empirical equation for calculating the enthalpy of the elements as a function of the temperature at constant pressure. This equation has the form:
Microbiological contamination is a relatively new food concern
Indicate whether the statement is true or false
To manually defrost a frozen evaporator coil, technicians should:
A) Chip away the ice from the coil using a tool designed for chipping ice. B) Use any available sharp object to chip away ice from the coil. C) Use a heat gun to accelerate the melting of the ice. D) Spray the ice with liquid refrigerant, which will boil and melt the ice.