If a sewage pump or ejector serves a commercial building, it must be capable of passing a 2-inch diameter solid and have a _____ minimum discharge pipe size.
a. 2-inch
b. 3-inch
c. 4-inch
d. 6-inch
ANSWER: b
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An electric space heater has a metal coil at a temperature of 250°C, and is used to heat a space with an air temperature of 15°C. If the surface area of the space heater is 0.02 m2, and the emissivity of the heating element is 0.95, what is the rate of radiation heat transfer between the heater and the air?
Given: Ts = 250°C = 523 K; Tsurr = 15°C = 288 K; A = 0.02 m2; ? = 0.95 What will be an ideal response?
________ entail laying polyethylene sheets directly on cuttings that are watered.
Fill in the blank(s) with the appropriate word(s).
The recommended method of detecting short circuit currents is the _____.
a. point-to-point method b. peak duty method c. symmetrical duty method d. momentary impedance method
A stuck piston ring often results from over heating the oil.
Answer the following statement true (T) or false (F)