What instrument can determine the coolant's conductivity?
A. a voltmeter
B. a hydrometer
C. a coolant exchanger
D. a refractometer
Answer: A
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primary operational problems are described as:
a. a term used to describe equipment that has broken, ruptured, or is no longer responding to its design specifications. b. a term used to describe the first problem that created a process upset. c. instruments used to detect process variables provide clues that can be used to complete the big picture. d. are created or respond to a primary operational problem that has created a process upset and a trickle down effect.
A) Find ?H and ?S for the gas as it travels through the compressor, and also find the amount of work Ws done by the compressor per mole of gas. B) The gas leaving the compressor is then condensed, after which it goes through a throttling valve that drops the pressure back to 0.3 atm, and then returns to the boiler. Find the amount of heat removed in the condenser (QH) per mole of refrigerant and the coefficient of performance of this refrigerator. C) What would be the coefficient of performance of a CARNOT refrigerator that operated between 275 K and 330 K?
A refrigerator operates according to the vapor-compression cycle. The amount of heat added in the boiler is 6500 Joules per mole of refrigerant. The vapor leaving the boiler is an ideal gas with a constant CV*=(5/2)R. This gas enters the compressor at P=0.3 atm and T=275 K and leaves at P=0.5 atm and T=330 K.
When evaluating multiple alternatives or projects, against what must they be compared, if they are (a)Â independent, and (b) mutually exclusive?
What will be an ideal response?
Use PSpice to find currents IaA and IAC in the unbalanced three-phase system shown in Fig. 12.69. Let Zl = 2 + j, Z? = 40 + j20 ?, Z? = 50 – j30 ?, and Z? = 25 ?.
What will be an ideal response?