Thermodynamics

Q. In an isothermal process, the change in internal energy of an ideal gas is:
  • A. Positive
  • B. Negative
  • C. Zero
  • D. Depends on the amount of gas
Q. In an isothermal process, the internal energy of an ideal gas:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the amount of gas
Q. In an isothermal process, the temperature of the system remains constant. What is the work done by the gas?
  • A. Zero
  • B. nRT ln(Vf/Vi)
  • C. nRT
  • D. nR(Tf - Ti)
Q. In an isothermal process, the temperature of the system:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies linearly
Q. In heat exchangers, which process is primarily utilized?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. All of the above
Q. In heat transfer, what does the term 'thermal resistance' refer to?
  • A. Resistance to heat flow
  • B. Resistance to electrical flow
  • C. Resistance to fluid flow
  • D. None of the above
Q. In which mode of heat transfer does the temperature difference drive the flow of heat?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Insulation
Q. In which mode of heat transfer does the transfer of energy occur through electromagnetic waves?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Insulation
Q. In which of the following materials does heat transfer occur primarily through conduction?
  • A. Metal
  • B. Water
  • C. Air
  • D. Vacuum
Q. In which of the following processes does heat transfer occur without any medium?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. None of the above
Q. In which of the following processes does the internal energy of a system remain constant?
  • A. Isothermal process
  • B. Adiabatic process
  • C. Isobaric process
  • D. Isochoric process
Q. In which of the following processes does the temperature of a gas increase?
  • A. Isothermal expansion
  • B. Adiabatic compression
  • C. Isobaric expansion
  • D. Isochoric cooling
Q. In which of the following processes does the temperature of a substance remain constant?
  • A. Heating
  • B. Cooling
  • C. Phase change
  • D. Compression
Q. In which of the following processes does the temperature of the system remain constant?
  • A. Isothermal process
  • B. Adiabatic process
  • C. Isobaric process
  • D. Isochoric process
Q. In which of the following scenarios does conduction occur?
  • A. Heating water in a pot
  • B. Sun warming the Earth
  • C. Wind blowing
  • D. Ice melting in a drink
Q. In which process does a gas do work on its surroundings?
  • A. Isothermal expansion
  • B. Adiabatic compression
  • C. Isochoric process
  • D. Isobaric process
Q. In which process does heat transfer occur due to the movement of fluid?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Insulation
Q. In which process does heat transfer occur without any physical movement of the material?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. All of the above
Q. In which scenario does heat transfer occur through both conduction and convection?
  • A. A hot cup of coffee cooling down
  • B. A metal rod heated at one end
  • C. A warm room losing heat to the outside
  • D. A block of ice melting
Q. The heat transfer coefficient in convection depends on which of the following?
  • A. Surface area
  • B. Fluid velocity
  • C. Temperature difference
  • D. All of the above
Q. The rate of heat transfer by conduction is directly proportional to the area and the temperature gradient. This is described by which law?
  • A. Newton's Law of Cooling
  • B. Fourier's Law of Heat Conduction
  • C. Stefan-Boltzmann Law
  • D. Ohm's Law
Q. The rate of heat transfer by conduction is directly proportional to which of the following?
  • A. Temperature difference
  • B. Surface area
  • C. Material thickness
  • D. All of the above
Q. The Stefan-Boltzmann Law relates to which mode of heat transfer?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Insulation
Q. What does the first law of thermodynamics state?
  • A. Energy can be created and destroyed.
  • B. The total energy of an isolated system is constant.
  • C. Heat cannot be converted into work.
  • D. The internal energy of a system is independent of its state.
Q. What happens to the entropy of a system when it undergoes a reversible isothermal expansion?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the gas
Q. What happens to the entropy of a system when it undergoes a reversible process?
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It can either increase or decrease
Q. What happens to the entropy of a system when it undergoes a spontaneous process?
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It becomes zero
Q. What happens to the entropy of an isolated system?
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It can either increase or decrease
Q. What happens to the internal energy of a gas when it is allowed to expand freely into a vacuum?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the initial temperature
Q. What happens to the internal energy of an ideal gas during an isochoric process?
  • A. It increases
  • B. It decreases
  • C. It remains constant
  • D. It can either increase or decrease
Showing 61 to 90 of 195 (7 Pages)
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