How much heat is being transferred if the water enters the heat exchanger at 50°F and leaves the exchanger at 40°F with a flow rate of 5 gallons per minute?
What will be an ideal response?
25000 Btu/h
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When sizing fuel gas piping for larger systems, the length of piping from meter to farthest appliance is increased by what percentage to allow for fittings in the pipe run?
a. 50% b. 25% c. 75% d. 10%
Answer the following statement(s) true (T) or false (F)
A. Combining rules describe how the pure component parameters “combine” to make a cross-parameter (such as the a12 parameter for the VDW equation of state). B. Mixing rules describe how the pure component parameters “mix” to make a cross-parameter (such as the a12 parameter for the VDW equation of state). C. The k12 parameter is normally reserved for correcting b12 in order to match experimental data. D. None of the above are true. E. All of the above are true.
Higher compression ratios can be attained from dished pistons instead of domed.
Answer the following statement true (T) or false (F)
Which of the following is a product of complete combustion?
A) methane B) carbon monoxide C) oxygen D) water vapor