Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 14, Problem 33RQ
True or False: A change in the differential of a control will always change the range of the control.
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Chapter 14 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 14 - Why is a low-voltage thermostat normally more...Ch. 14 - The three kinds of switching mechanism used in...Ch. 14 - Prob. 3RQCh. 14 - What does a cold anticipator do?Ch. 14 - Define system overshoot when dealing with...Ch. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Describe the method a service technician should...Ch. 14 - Explain how microelectromc or electrontc...Ch. 14 - Prob. 10RQ
Ch. 14 - What component steps down the voltage to the...Ch. 14 - Low voltage is desirable for residential control...Ch. 14 - What is the maximum amperage usually encountered...Ch. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - What two types of switches are normally found in...Ch. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Why is a line-voltage thermostat mounted on an...Ch. 14 - What is the principle of operation for most...Ch. 14 - Describe a method for speedmg up the cooling of an...Ch. 14 - Describe two methods for cooling an overheated...Ch. 14 - How can an electronic thermometer be used in a...Ch. 14 - A temperature-sensing device used in measuring...Ch. 14 - How does a thermocouple change with a temperature...Ch. 14 - True or False: Pressures below atmospheric...Ch. 14 - Name one function of the low-pressure control.Ch. 14 - Which is true of a high-pressure control? A. It...Ch. 14 - Name two types of water pressure control.Ch. 14 - Why should a safety control not be adjusted if it...Ch. 14 - Prob. 31RQCh. 14 - True or False: A change in the differential...Ch. 14 - True or False: A change in the differential of a...Ch. 14 - Prob. 34RQCh. 14 - Explain what is meant by the range of a...
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- Another term used to describe sensitivity in electronic controls is A. temperature. B. gain. C. rpm. D. pressure.arrow_forwardService output is used only to experience the system. true or falsearrow_forwardPresence detectors, thermostat and pressure plate are not examples of automated systems. Select one: True Falsearrow_forward
- q4 From the following identify the true statement relating to the term Predictive maintenance The maintenance on machines to determine the actual time to failure and cannot improve the quality of the product. The maintenance on machines not to determine the actual time to failure and can improve the quality of the product. The maintenance on machines to determine the actual time to failure and can improve the quality of the product. The maintenance on machines not to determine the actual time to failure and cannot improve the quality of the product.arrow_forwardNuclear Instrumentation & Control Describe the general process used to calibrate a device such as a pressure gauge or a temperature indicator.arrow_forwardWhat is a Thermocouple: Select one: a. A Thermocouple is a temperature sensor that uses a small length of platinum wire that is trimmed to have particular resistance at specific temperature. b. A Thermocouple is a temperature sensor that consists of two wires of similar metals joined at one end. C. A Thermocouple is a type of resistor whose resistance varies with temperature. d. A Thermocouple is a temperature sensor that consists of two conducting wires of dissimilar metals joined at one end.arrow_forward
- Read each statement carefully and answer by True or False (if False then, correct the statement). 1- Process control combines how physics, chemistry, and biology work in operating equipment and an understanding of dynamic systems. 2- When a second letter is used in instrumentation symbols, e.g., Pressure Indicator Controller (PIC), it defines the measured or initiating variables. 3- P&ID contains the sensor details such as physical principle and measurement range. 4- FRC 82516: Flow Recording Controller, area no 825, process unit 8, loop number 16. 5- P&ID excludes equipment identification.arrow_forwardq7 Alternation and inspection of equipment are the secondary functions of maintenance. Select one: True Falsearrow_forwardPlant protection including fire protection is the secondary maintenance function. Select one: O True O Falsearrow_forward
- true or false need before 7:45 pm pleaseeee neeed it 1.Mass component that do not vary as it passes though the system is helpful if its mass balance is included in assessing the system Adiabatic system is a real system Control volume is a region in space surrounded by a control surface through which the fluid flows. Steam is said to be superheated if its actual temperature is higher than its saturated temperature at constant pressure Generation or depletion terms are included in a component mass balance if the component undergoes chemical reaction. Mass balance may refer to total mass balance or component mass balance. The degree of freedom of a system is equal to the difference between the number of unknown variables and the number of independent equations In a component mass balance, the component generation term has the same sign as the output streams. For water, the density of its vapors, liquid, and solid are in increasing orderarrow_forwardWhich of the following statements is incorrect? a. As a result, molecules will flow in one of six potential ways. As a result, it is reasonable to predict that one-sixth of it will move in the positive direction.b. Flux is the rate at which something is transported per unit area of space.c. Flux can occur even if there is no driving forced.Initially, the flow for transport processes is nonlinear, but over a period of time, the flux becomes linear.arrow_forwardNuclear Instrumentation and Control List the three modes of industrial process control and specify the effect of each when a process disturbance occurs.arrow_forward
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