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 32, Problem 4RQ
As the temperature of an oil sample decreases,
A. the viscosity of the oil increases.
B. the oil will flow better through oil lines and nozzles.
C. the viscosity of the oil decreases.
D. Both B and C are correct.
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Chapter 32 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 32 - How many grades of fuel oil are normally...Ch. 32 - What two elements make up fuel oil?Ch. 32 - The most common fuel oil used for residential and...Ch. 32 - As the temperature of an oil sample decreases, A....Ch. 32 - If oil is to be stored at temperatures lower than...Ch. 32 - Prob. 6RQCh. 32 - If it is expected that an oil-fired appliance will...Ch. 32 - How many pounds of oxygen are required to burn 1...Ch. 32 - Explain the concept of excess air when it is used...Ch. 32 - Before fuel oil can be burned, it must be A....
Ch. 32 - What products of combustion are produced with...Ch. 32 - When incomplete combustion occurs, what additional...Ch. 32 - The minimum nozzle pressure for residential and...Ch. 32 - Prob. 14RQCh. 32 - Describe the three functions of the oil burner...Ch. 32 - Describe three common spray patterns for an oil...Ch. 32 - The purpose of the electrodes of an oil burner is...Ch. 32 - Prob. 18RQCh. 32 - Prob. 19RQCh. 32 - List the advantages a solid-state igniter has over...Ch. 32 - Which of the following is the typical output...Ch. 32 - Prob. 22RQCh. 32 - Prob. 23RQCh. 32 - Prob. 24RQCh. 32 - Explain the difference between the hot contacts...Ch. 32 - The purpose of the cad cell in an oil burner...Ch. 32 - Explain why it is important to keep the cad cell...Ch. 32 - A one-pipe system may be used when the oil tank is...Ch. 32 - Prob. 29RQCh. 32 - Prob. 30RQCh. 32 - The oil flame must not hit the combustion chamber...Ch. 32 - Describe the purpose of the heat exchanger.Ch. 32 - When servicing an oil burner, a service technician...Ch. 32 - Describe the function of the flame-retention ring...
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- Typically during a pressure test, the pressure should not drop more than_____ psi between shifts.arrow_forwardViscosity of oils can be measured by: a. Its maximum pressure in a journal bearing b. None of the above C. Screwbolt viscosimeter d. Saybolt viscosimeter e. Seabolt viscosimeterarrow_forwardThe rate of change of viscosity with temperature is known as viscosity index and high viscosity index means oil will remain the same over a wide range of temperatures, Select one: True Falsearrow_forward
- 16. If oil has an absolute viscosity of 510 poises, what is its viscosity in the fps system?arrow_forwardUsing Boyle's law demonstrator, the oil is transferred between the measuring chamber and the fluid chamber via: Select one: a. A pressure relief valve. b. A needle valve. C. A flow control valve. d. A compressor.arrow_forwardWhich of the following forms of viscosity is dimensionless?a. relative b. intrinsic c. dynamic d. inherentarrow_forward
- Technician A says that it takes about 1 pint of oil to raise the oil level from "add" to "full." Technician B says that it takes about 1 quart to raise it that much. Who is correct? Select one: a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardConsidering the results in Table 1, and the documentation in the image too, please calculate the dynamic viscosity for the fluids listed in Table 3.arrow_forward2.A. You can usually check for a leak in a vacuum system by looking at or feelingA. at the exhaust of the vacuum pump.B. at the vacuum gauge at the vacuum pump.C. for signs of dirt on the piping. 2.B. When you measure the voltage drop across a set of contacts, you'reA. checking the quality of the contact set.B. sensing how much current is flowing in the circuit.C. measuring the equivalent motor resistance. 2.C. A chain-drive system can be aligned easier than a belt-drive system since the chain-drive systemA. can have a string left on the sprockets after the alignment is complete.B. can have the chain removed while the final alignment is taking place.C. is less critical to misalignment.arrow_forward
- Which of the following is/are extensive property of fluid? Weight Specific volume Color Mass Density Relative density Viscosityarrow_forwardThe ratio of dynamic viscosity to kinematic viscosity is a.viscosity b.specific grasvity c.weight density d.densityarrow_forwardIndustrial Main Which has the higher viscosity, grease or oilarrow_forward
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