An (a) __________ reaction liberates heat and the temperature of the reaction mixture increases.
Answer
Correct Answer:
Exothermic
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The clearance volume of a compressor cylinder is the ____.
Answer
Correct Answer:
Volume of the space between the bottom of the valve plate and the top of the piston at top dead-center
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A what is a heat sink?
Answer
Correct Answer:
A heat reservoir that absorbs energy in the form of heat
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What does a heat sink absorb?
Answer
Correct Answer:
Energy in the form of heat
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What does a heat sink do?
Answer
Correct Answer:
Absorbs energy in the form of heat
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A reservoir that can supply or absorb energy in the form of heat is known as what?
Answer
Correct Answer:
Thermal energy reservoir
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What are thermal energy reservoirs?
Answer
Correct Answer:
Heat reservoir
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What is a reservoir capable of doing?
Answer
Correct Answer:
Supply or absorb energy
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How many Btu
Answer
Correct Answer:
1
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What is the expression of the conversion efficiency of power plants in the US?
Answer
Correct Answer:
Heat rate
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What is the conversion efficiency of power plants in the US?
Answer
Correct Answer:
Rate
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What is the heat pump coefficient of performance expressed as?
Answer
Correct Answer:
Desired output divided by required input
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What is the cyclic device that causes the transfer of heat from a low-temperature region to a high-temperature region?
Answer
Correct Answer:
Heat pump
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What kind of products are produced when a fuel is burned?
Answer
Correct Answer:
Combustion products
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How much heat would a fuel release when burned completely?
Answer
Correct Answer:
Heating value of a fuel
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The value of a fuel
Answer
Correct Answer:
Enthalpy of combustion
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What are heat exchangers used for?
Answer
Correct Answer:
Various industries
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What kind of heat exchanger has two pipes that are different sizes?
Answer
Correct Answer:
Double-tube
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What are engines designed to convert?
Answer
Correct Answer:
Other forms of energy
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What are engines designed for?
Answer
Correct Answer:
Converting other forms of energy
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What are absorption refrigeration systems often classified as?
Answer
Correct Answer:
Heat-driven systems
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A system and its surroundings are called what?
Answer
Correct Answer:
Two systems
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What is defined as the form of energy that is transferred between systems by virtue of a temperature difference?
Answer
Correct Answer:
Heat
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Gravitational acceleration g is what percent less at 30,000 than it is at sea level?
Answer
Correct Answer:
Less than 1 percent
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What is the gravitational acceleration at sea level?
Answer
Correct Answer:
9.807 m/s2
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What type of analysis gives the mass of each component of a mixture?
Answer
Correct Answer:
Gravimetric
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What is the name of the process used to determine the composition of a mixture?
Answer
Correct Answer:
Gravimetric analysis
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What is a rule that describes multicomponent, multiphase systems?
Answer
Correct Answer:
Gibbs phase rule
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What does the Gibbs phase rule provide the number of?
Answer
Correct Answer:
Independent variables
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What does Gibbs-Dalton law say about the behavior of a gas components in a mixture?
Answer
Correct Answer:
Behaves as if it exists alone at the mixture temperature
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In a mixture of gases, the behavior of each component is what under the ideal-gas approximation?
Answer
Correct Answer:
As if it exists alone
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What is the law that states a gas component behaves as if it exists alone at the mixture temperature and mixture volume?
Answer
Correct Answer:
Gibbs-Dalton law
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What do heat pumps use the ground for?
Answer
Correct Answer:
Heat source
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What is a ground-source heat pump?
Answer
Correct Answer:
Geothermal heat pumps
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What are the inputs to a generator?
Answer
Correct Answer:
Mechanical power
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What is a generator
Answer
Correct Answer:
Generator efficiency
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Electrical energy is derived from what type of device?
Answer
Correct Answer:
Generator
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What is a plot of the entropy departure factor used to determine?
Answer
Correct Answer:
The deviation of the entropy of a gas
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What is the deviation of the entropy of a gas at a given P and T from the entropy of an ideal gas at the same P and T indicated with the term departure chart?
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What does the name gasses seem to obey?
Answer
Correct Answer:
Corresponding states
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What type of chart shows that gases seem to obey the principle of corresponding states reasonably well?
Answer
Correct Answer:
Generalized compressibility chart
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What is the working fluid in a gas refrigeration cycle?
Answer
Correct Answer:
Lower-temperature fluid
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The lower-temperature working fluid is used to produce what effect?
Answer
Correct Answer:
Refrigeration
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What remains a gas throughout the entire cycle in a gas power cycle?
Answer
Correct Answer:
The working fluid
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What are cycles where the working fluid remains a gas throughout the entire cycle?
Answer
Correct Answer:
Gas power cycles
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What is constantly occurring when molecules are in a container?
Answer
Correct Answer:
Colliding with each other
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What is the phase of a substance that has molecules that are far apart from each other?
Answer
Correct Answer:
Gas phase
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What determines the value of R for each gas?
Answer
Correct Answer:
R = Ru/M
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What does the Gage pressure represent?
Answer
Correct Answer:
The difference between the absolute pressure and the local atmospheric pressure
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What is the difference between the absolute pressure and the local atmospheric pressure?
Answer
Correct Answer:
Gage pressure
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What is the chemical energy of a fuel cell converted to?
Answer
Correct Answer:
Electric energy
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What is the name of the efficiency limit of a fuel cell?
Answer
Correct Answer:
Carnot
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What are fuel cells not?
Answer
Correct Answer:
Heat engines
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What is the ratio of air to fuel in an engine?
Answer
Correct Answer:
Fuel-air ratio
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The fuel-air ratio is the reciprocal of what?
Answer
Correct Answer:
Air-fuel ratio
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What can be used as fuel to release energy?
Answer
Correct Answer:
Material
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What kind of material can be burned?
Answer
Correct Answer:
Fuel
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A four stroke engine has an odd number of cycles per cylinder, so it has an even total number of cycles per revolution. How many revolutions per thermodynamic cycle is that?
Answer
Correct Answer:
Two
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What does the crankshaft complete for each thermodynamic cycle?
Answer
Correct Answer:
Two revolutions
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What is the name of the convention that defines the direction of heat transfer and work?
Answer
Correct Answer:
Sign convention
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What is the sign convention for heat and work interactions?
Answer
Correct Answer:
Formal sign convention
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What is a forced-draft cooling tower?
Answer
Correct Answer:
A wet cooling tower
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What is the technical term for forced-draft cooling tower?
Answer
Correct Answer:
Induced-draft cooling tower
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What is the value of flow work on a unit mass basis?
Answer
Correct Answer:
Pv
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Air that is rapidly compressed undergoes _________.
Answer
Correct Answer:
Increase in temperature;
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The _____ law of thermodynamics states that not all energy is used because _____.
Answer
Correct Answer:
Second; some of the energy disperses as heat
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δh for an endothermic process is ________ while δh for an exothermic process is ________.
Answer
Correct Answer:
Positive, negative
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When you click through to the end of a presentation, ________ displays.
Answer
Correct Answer:
Blank Slide
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When the quantity q is greater than zero, __________ is added to the system.
Answer
Correct Answer:
Heat
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The entropy of an isolated system _________.
Answer
Correct Answer:
Always increases or remains constant.
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Spontaneous reactions _____.
Answer
Correct Answer:
Always result in increased disorder of the system
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The thermodynamic processes that occur in nature ____________.
Answer
Correct Answer:
Convert thermal energy into mechanical energy
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The internal energy of a system is always increased by __________.
Answer
Correct Answer:
Adding heat to the system
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Inborn or intrinsic reflexes are ________.
Answer
Correct Answer:
Involuntary, yet may be modified by learned behavior
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Internal energy undergoes changes when there are corresponding changes in _________.
Answer
Correct Answer:
Temperature
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Energy cannot be _______.
Answer
Correct Answer:
Destroyed
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As entropy in a system increases, energy in the system _________.
Answer
Correct Answer:
Becomes less ordered
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The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
Answer
Correct Answer:
Specific heat at cOnstant volume
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There is no change in internal energy in an isothermal process.
Answer
Correct Answer:
Correct
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The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
Answer
Correct Answer:
Fractional distillation
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The entropy __________ in an irreversible cyclic process.
Answer
Correct Answer:
Increases
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The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas.
Answer
Correct Answer:
Two-third
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The efficiency and work ratio of a simple gas turbine cycle are
Answer
Correct Answer:
Very low
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The processes occuring in open system which permit the transfer of mass to and from the system, are known as
Answer
Correct Answer:
Flow processes
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Workdone in a free expansion process is
Answer
Correct Answer:
Zero
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Water gas is obtained by passing air and a large amount of steam over waste coal at about 650°C.
Answer
Correct Answer:
Incorrect
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The value of specific heat at constant pressure (Cp) is __________ that of at constant volume (Cv).
Answer
Correct Answer:
More than
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The value of gas constant (R) in S. I. units is
Answer
Correct Answer:
287 J/kgK
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The ratio of specific heat at constant pressure (Cp) and specific heat at constant volume (Cv) is
Answer
Correct Answer:
Greater than one
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The efficiency of Diesel cycle approaches to Otto cycle efficiency when
Answer
Correct Answer:
Cut-off is zero
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In the first law of thermodynamics, the total energy of the system remains constant.
Answer
Correct Answer:
True
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A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
Answer
Correct Answer:
Diesel cycle
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An adiabatic process is one in which
Answer
Correct Answer:
All of these
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The compression ratio for petrol engines is
Answer
Correct Answer:
5 to 8
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Which of the following has the minimum atomic mass?
Answer
Correct Answer:
Carbon
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All the commercial liquid fuels are derived from natural petroleum (or crude oil).
Answer
Correct Answer:
True
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According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant.
Answer
Correct Answer:
True
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