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:
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
- b. adiabatic
- 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
- b. Adiabatic
- 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
- b. Adiabatic
- 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.
- a. Irradiance
- 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
- b. Radiance
- 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.
- a. Radiation
- b. Ionization
- c. Convection
- d. Insolation
591. It is a process during which the pressure remains constant
- a. Adiabatic
- 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
- c. Irradiance
- 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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