Which of the following hazards can cause an explosion in the firebox?
A. Failing to purge the firebox
B. Poor control of excess air
C. Loss of boiler feedwater
D. Loss of fuel gas or oil
A. Correct. Failing to purge the firebox can cause an explosion in the firebox.
B. Incorrect. Poor control of excess air does not cause an explosion in the firebox.
C. Incorrect. Loss of boiler feedwater does not cause an explosion in the firebox.
D. Incorrect. Loss of fuel gas or oil does not cause an explosion in the firebox.
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Suppose a gas has an ideal gas heat capacity of CP=(7/2)R and is described by the equation of state: Z = 1 + (CP2)/(RT) With C = 100 cm3/bar-mol. (R=83.14 bar-cm3/mol-K)
A) Find a general expression for the enthalpy departure function for this gas. B) Find a general expression for the entropy departure function for this gas. C) Find ?H and ?S for the gas if it is isothermally compressed from P=1 bar and T=400 K to P=50 bar and T=400 K. Note: To receive full credit on A and B, your answers should be ALGEBRAIC expressions in terms of MEASUREABLE properties and/or known constants; all derivatives and integrals must be evaluated.
Should animals be used for other purposes, such as for hunting or trapping, for entertainment purposes
in zoos and exhibits, for rodeos, or even for pets?
What will be an ideal response?Refrigerant recovery cylinders should not be filled above:
A) 70% of their volume with liquid. B) 90% of their volume with liquid. C) 100% of their volume with liquid. D) 80% of their volume with liquid.
Endothermic fire-stopping material reacts to heat by _____
a. expanding b. releasing water c. releasing carbon dioxide d. contracting