 MCQs in Thermodynamics Part XII

(Last Updated On: December 8, 2017) This is the Multiples Choice Questions Part 12 of the Series in Thermodynamics as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.

Online Questions and Answers in Thermodynamics Series

Following is the list of multiple choice questions in this brand new series:

MCQs in Thermodynamics
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII
PART 8: MCQs from Number 351 – 400                 Answer key: PART VIII
PART 9: MCQs from Number 401 – 450                 Answer key: PART IX
PART 12: MCQs from Number 551 – 560                Answer key: PART XII

Continue Practice Exam Test Questions Part XII of the Series

551. Which of the following cannot be a property of a gas?

• a. density
• b. pressure
• c. viscosity
• d. temperature

552. During the adiabatic process, which of the following is the change in entropy?

• a. zero
• b. greater than zero
• c. less than zero
• d. infinity

553. Which of the following values characterize the state of the system?

• a. cycle
• b. process
• c. property
• d. enthalpy

554. Which of the following is least efficient?

• a. Gas turbine
• b. Diesel engine
• c. Carnot engine
• d. Gasoline engine

555. Which of the following engines is the most efficient?

• a. Gas turbine
• b. Diesel engine
• c. Carnot engine
• d. Gasoline engine

556. Which of the following engines is the most efficient?

• a. Isobaric expansion
• b. Adiabatic compression
• c. Adiabatic expansion
• d. Isothermal expansion

557. Who coined the word energy?

• a. James Joule
• b. Thomas Young
• c. Rudolf Diesel
• d. Lord Kelvin

558. Which of the following laws of thermodynamic which leads to the definition of entropy?

• a. First law
• b. Second law
• c. Third law
• d. Law of conservation of energy

559. Which of the following is the other term used for enthalpy-entropy diagram?

• a. Enthalpy diagram
• b. Mollier diagram
• c. Steam diagram
• d. Entropy chart

560. What is used for predicting the behavior of non-ideal gases?

• a. Compressibility factor
• b. Expansivity factor
• c. Emissivity factor
• d. Van-d-whal’s factor

561. Which of the following thermodynamic devices operates the reverse of the heat engine?

• a. Thermal pump
• b. Thermal evaporator
• c. Thermal condenser
• d. Thermal equilibrant

562. What is another term used for isometric processes?

• a. Isochoric process
• b. Iolytropic process
• c. Isothermal process
• d. Reversible process

563. Which of the following engines was introduced by a German engineer, Nickolas Otto?

• a. Gasoline engine
• b. Diesel engine
• c. Gas turbine
• d. Thermal engine

564. If two systems are in the thermal equilibrium with a third system, then they must be in thermal equilibrium with each other.

• a. Zeroth Law of Thermodynamics
• b. First Law of Thermodynamics
• c. Second Law of Thermodynamics
• d. Third Law of Thermodynamics

565. The heat absorbed by a unit mass of a material at its holding point in order to convert the material into a gas at the same temperature.

• a. Latent Heat of Sublimation
• b. Latent Heat of Vaporization
• c. Latent Heat of Fusion
• d. Latent Heat Of Condensation

566. A thermodynamic process in which entropy is conserved

• a. isentropic
• c. isothermal
• d. polytropic

567. A control volume refers to what?

• a. A fixed region in space
• b. A reversible process
• c. an isolated system
• d. a specified mass

568. Which of the following is commonly used as liquid absorbent?

• a. Silica gel
• b. Activated alumina
• c. Ethylene glycol
• d. None of these

569. One for which no heat is gained or lost

• a. Isentropic
• c. Isothermal
• d. Polytropic

570. A law relating the pressure, temperature and volume of an ideal gas

• a. Gay-Lussac’s Law
• b. Ideal gas Law
• c. Charles’ Law
• d. Boyle’s Law

571. Occurs when the vapor pressure equals the atmospheric pressure

• a. Boiling
• b. Melting
• c. Freezing
• d. Vaporizing

572. As temperature goes to “0”, the entropy approaches a constant

• a. Zeroth Law of Thermodynamics
• b. First Law of Thermodynamics
• c. Second Law of Thermodynamics
• d. Third Law of Thermodynamics

573. An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of gas

• a. Remains constant
• b. increases
• c. decreases
• d. is basically zero

574. Occurring at fixed temperature

• a. isentropic
• c. Isothermal
• d. polytropic

575. The changing of solid directly to vapor without passing through liquid state is called

• a. Evaporation
• b. Vaporization
• c. Sublimation
• d. Condensation

576. The phase transition of a liquid to a solid

• a. Solidification
• b. Freezing
• c. Fusion
• d. All of these

577. It is an energy flux, equal to the rate of energy flow per unit area per unit time across some surface.

• b. Radiant Intensity
• c. Luminosity
• d. Brightness

578. The volume of a gas under constant pressure increases or decrease with temperature.

• a. Gay- Lussac’s Law
• b. Ideal Gas Law
• c. Charles’ Law
• d. Boyle’s Law

579. The molecular number density of an ideal gas at standard temperature and pressure in cm3

• a. Froude number
• b. Loschmidt number
• c. Mach number
• d. Reynold number

580. A temperature scale whose zero point is absolute zero, the temperature of “0” entropy at which all molecular motion stops.

• a. Celsius
• b. Fahrenheit
• c. Kelvin
• d. Rankine

581. The thermal radiation emitted by a blackbody heated to a given temperature.

• a. Gamma Radiation
• b. Black Body Radiation
• c. Electromagnetic Radiation
• d. Alpha Radiation

582. The radiation emitted by a body as a result of its temperature.

• a. Blackbody Radiation
• b. Thermal Inversion
• c. Thermionic Inversion
• d. Thermal Radiation

583. At Equilibrium, the radiation emitted must equal the radiation absorbed.

• a. Boyle’s Law
• b. Planck’s Law
• c. Kirchoff’s Law
• d. Joule’s Law

584. The theory that heat consisted of a fluid, which could be transferred from one body to another, but not “created” or “destroyed”.

• a. Clausius Theorem
• b. Caloric Theory
• c. Joules Law
• d. Newton’s Law of cooling

585. The volume of a gas is directly proportional to the number of molecules of the gas.

• a. Ideal gas law
• b. Boyle-Mariotte Law
• c. Avogadro’s Hypothesis
• d. Gay-Lussac’s Law of combining Volumes

586. For a body cooling in a draft, the rate of heat loss is proportional to the difference in temperature between the body and its surroundings.

• a. Nemst Effect
• b. Caloric Theory
• c. Joule’s Law
• d. Newton’s Law of Cooling

587. It is the intensity of a radiating source.

• a. Specific Brightness
• c. Surface Brightness
• d. All of these

588. This law of thermodynamics prohibits the construction of a perpetual motion machine “of the second kind”

• a. Zeroth Law of Thermodynamics
• b. First Law of Thermodynamics
• c. Second Law of Thermodynamics
• d. Third Law of Thermodynamics

589. A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole?

• a. 125.02
• b. 130.08
• c. 135.05
• d. 120.04

590. It is the deposition of radiant energy as heat into an absorbing body.

• b. Ionization
• c. Convection
• d. Insolation

591. It is a process during which the pressure remains constant

• b. Isentropic
• c. Isobaric
• d. Isotropic

592. Diffusion due to thermal motion is called

• a. dilation
• b. infusion
• c. effusion
• d. dispersion

593. The rate at which this is quantity passes through a fixed boundary per unit time

• a. Flux
• b. Existence
• d. All of these

594. Energy can neither created nor destroyed. It can only change forms.

• a. Conservation of Mass Principle
• b. Conservation of Energy Principle
• c. Conservation of Momentum Principle
• d. Conservation of Heat Principle

595. Executes the entire cycle in just two strokes the power stroke and the compression stroke.

• a. One-stroke engine
• b. Two-stroke engine
• c. Four-stroke engine
• d. Eight-stroke engine

596. It is the unbalanced force developed in a turbo jet engine that is caused by the difference in the momentum of the low-velocity air entering the engine and the high velocity exhaust gases leaving the engine.

• a. Fall
• b. Lift
• c. Drag
• d. Thrust

597. Which of the engine is used for fighter bombers?

• a. Turbojet
• b. Pulsejet
• c. Rockets
• d. Ramjet

598. The Science of Energy

• a. Thermionics
• b. Kinetics
• c. Thermodynamics
• d. Geophysics

599. It is used for gas turbines which operates on an open cycle where both the compression and expansion processes take place in rotating machinery.

• a. Dual Cycle
• b. Otto Cycle
• c. Carnot Cycle
• d. Brayton Cycle

600. Which of the following laws of thermodynamic which leads to the definition of entropy?

• a. First law
• b. Second law
• c. Third law
• d. Law of conservation of energy

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