A system using R-404a has an evaporation temperature of 0°F. If the line length is 100 ft and the system needs a capacity of 2 tons, what size line should be used?
A) 3/4 in B) 7/8 in C) 5/8 in D) 1-1/8 in
B
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Show the equation and variables associated with the integrated form of the Stefan – Boltzmann law of radiation.
What will be an ideal response?
Which one of the following statements on PLC 5 module addressing is NOT true?
A) The PLC 5 chassis is configured by setting switches. B) A second colon (:) follows the rack number and the final two digits are the terminal numbers or input or output image table bit numbers. C) An I is used for inputs or an O for outputs. D) A colon (:) is used as a delimiter between the I or O and rack number.
In a pass-transistor regulator, the base transistor voltage is held relatively constant by a
A) JFET B) silicon junction diode C) zener diode D) NPN transistor
T-squares annd parallel bars are used to draw horizontal lines only.
Answer the following statement true (T) or false (F)