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 1, Problem 7RQ
In which direction does heat flow?
A. From a cold substance to a cold substance
B. Up
C. Down
D. From a warm substance to a cold substance
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Students have asked these similar questions
Which one of the following processes of heat transfer requires the presence of a fluid?
a. conduction
b. radiationc. convectiond. none of the above choices are valid
True or false thermal energy moves from a colder region of an object to a hotter region
When heat energy transfers through a liquid
or gas, what is it called?
Select one:
a. Conduction
b. Convection
c. Radiation
d. Induction
Chapter 1 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 1 - Temperature is defined as A. how hot it is. B. the...Ch. 1 - State the standard conditions for water to boil at...Ch. 1 - List four types of temperature scales.Ch. 1 - Under standard conditions, water freezes at ____C.Ch. 1 - Molecular motion stops at _______F.Ch. 1 - One British thermal unit will raise the...Ch. 1 - In which direction does heat flow? A. From a cold...Ch. 1 - Describe heat transfer by conduction.Ch. 1 - Increase in sensible heat causes A. a higher...Ch. 1 - Latent heat causes A. a higher thermometer...
Ch. 1 - Describe how heat is transferred by convection.Ch. 1 - Describe how heat is transferred by radiation.Ch. 1 - Specific heat is the amount of heat necessary to...Ch. 1 - Atmospheric pressure at sea level under standard...Ch. 1 - To change from psig to psia, you must add...Ch. 1 - Convert 80F of Celsius.Ch. 1 - Convert 22C to Fahrenheit.
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- Specific Heat deals with the internal energy in transit that transfers due to the constant temperature. True or Falsearrow_forwardHow many Btu of heat can be produced by 4 kWh ofelectricity?arrow_forwardTemperature is defined as A. how hot it is. B. the level of heat. C. how cold it is. D. why it is hot.arrow_forward
- 4. How does an air bag protect a driver during an accident? It reduces the kinetic energy loss of the driver. I It reduces the momentum change of the driver. It increases the momentum change of the driver. It shortens the stopping time of the driver and increases the force applied during the accident. It lengthens the stopping time of the driver and reduces the force applied during the accident.arrow_forwardWhich of the following is not a true statement about heat transfer? a. Whenever the temperature of something changes, a transfer of heat has occurred. b. Conduction is the transfer of heat by infrared rays. c. Light bulbs are examples of heat transfer by radiation. d. Convection occurs when a hot object moves to an area with less heat.arrow_forwardSubject: Thermodynamics What is the increase of temperature in degree F of 2 liters of water at 30°C after 1500 calories of heat have been added to?arrow_forward
- 3) Choose the correct statement from the following: a. Mass of the body vary with location b. Forces are not characterized by magnitude and direction c. Kinematics is the study of motion of particle without any reference to force d. Weight of the body does not vary with location Clear my choicearrow_forwardWhich of the following is not a pure substance. Sea Water Gaseous air Water Vapour Nitrogenarrow_forwardWhich of the following will have a higher rate of heat transfer. With conduction heat transfer. A. pulverized shale stone B. the stone and the pulverized shale will have the same heat transfer as they have the same conductivity constant. C. a solid block of shale stone D. the pulverized shale will have a higher heat transfer as it has a higher duction coefficientarrow_forward
- 3- State which of the following statements are TRUE? a) For a backward curved blade, the fan total pressure (FTP) increases as flow rate increases b) For a backward curved blade, the fan total pressure (FTP) reaches a maximum at a particular flow rate c) When the air filter in the air conditioning duct becomes dirty, the speed has to be increased to maintain the balance between fan and duct systems d) When the damper installed in the duct is opened more, to maintain the balance, the speed of the fan should be increasedarrow_forwardWhich of the following statement (s) are correct? I) Heat transfer is by conduction in opaque solids II) Heat transfer is by conduction and convection in semitransparent solids III) Heat transfer is by conduction in flowing liquids IV) Heat transfer is by conduction and radiation in still gases V) Heat transfer is by convection and radiation in flowing gases VI) Heat transfer is by convection in vacuum a. I, IV and VI b. I, IV and V c. I, II and V d. II, IV and VI e. II, III and Varrow_forwardWhich of the following statements is true a. Heat and work are thermodynamics functions. b. The 1st law of thermodynamics states that the energy of the universe is conserved. c. A frictional pendulum is an example of a reversible process d. Enthalpy and entropy are path dependent Explain it on a paper neat and clean correctly pleasearrow_forward
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