Quiz 1: Introduction – MJNEXIS-ERA

Thermodynamics for Chemical Engineers 1

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You have 15 minutes and 30 seconds for 30 questions. All the best!!!

Quiz 1: Introduction

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1. A pressure reading of zero on a gauge implies?

1. Absolute vacuum

2. No pressure acting

3. Critical pressure

4. Pressure equal to atmospheric pressure

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2. A gas initially at 400 K is cooled to 103°C. What is the change in temperature?

1. 570 K

2. 297 K

3. 24 K

4. 230 K

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3. 27°C to Kelvin is approximately...

1. 246 K

2. 310 K

3. 300 K

4. 273 K

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4. A system that undergoes a cycle...

1. Has zero heat transfer

2. Does no work

3. Ends at a different state

4. Has zero net energy change

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5. Pressure is defined as?

1. Force per unit volume

2. Force acting normally per unit area

3. Energy acting normally per unit area

4. Energy per unit volume

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6. Which law of thermodynamics explains why heat does not spontaneously flow from a cooler region to a warmer one?

1. Zeroth law

2. Third law

3. Second law

4. First law

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7. Which of the following statements is true?

1. Heat and work are properties

2. Heat and work are path functions

3. Work is stored in a system

4. Heat is stored in a system

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8. A closed system is also called a control volume

1. True

2. False

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9. An open system is also called a control mass.

1. True

2. False

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10. Which property is intensive?

1. Mass

2. Total energy

3. Volume

4. Temperature

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11. An open system is also called a control volume

1. True

2. False

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12. Absolute pressure is given by?

1. Vacuum pressure+gauge pressure

2. Gauge pressure-atmospheric pressure

3. Gauge pressure+atmospheric pressure

4. Atmospheric pressure-gauge pressure

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13. Which of the following are absolute temperature scales? Select all that apply.

1. Kelvin

2. Celsius

3. Rankine

4. Centigrade

5. Fahrenheit

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14. How can you convert an extensive property to a specific property?

1. Multiply by mass

2. Subtract mass

3. Add mass

4. Divide by mass

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16. The zeroth law of thermodynamics is important because it allows us to?

1. Define temperature

2. Conserve energy

3. Link the first and second laws

4. Define work

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17. If a vacuum pressure of 30 kPa is recorded and atmospheric pressure is 100 kPa, the absolute pressure is?

1. 100 kPa

2. 30 kPa

3. 130 kPa

4. 70 kPa

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18. Gauge pressure is measured relative to?

1. Vacuum pressure

2. Absolute zero pressure

3. Critical pressure

4. Atmospheric pressure

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19. A piston-cylinder with a moving piston is an example of a system with a

1. Rigid boundary

2. Imaginary boundary

3. Fixed boundary

4. Moveable boundary

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20. A pressure gauge reads 250 kPa. If atmospheric pressure is 100 kPa, the absolute pressure is?

1. 175 kPa

2. 150 kPa

3. 100 kPa

4. 350 kPa

5. 250 kPa

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21. Absolute temperature scales are preferred in thermodynamic applications usually because...

1. They avoid negative values

2. Zero corresponds to minimum molecular energy

3. They are easier to measure

4. They balance out well with other common properties

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22. A closed system is also called a control mass.

1. False

2. True

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23. Mechanical equilibrium implies?

1. Constant mass

2. No chemical reactions

3. No unbalanced forces

4. Uniform temperature

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24. Which of the following is an extensive property?

1. Volume

2. Pressure

3. Density

4. Temperature

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25. The universe is a system and its surroundings.

1. True

2. False

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26. Which of the following best describes a control volume?

1. A system whose conditions can be monitored and controlled

2. A system that cannot exchange energy

3. A fixed region in space through which mass may flow

4. A fixed mass under study

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27. Thermodynamics is primarily concerned with?

1. Chemical reaction kinetics

2. The rate at which processes occur

3. Molecular motion at the atomic scale

4. The transformation of energy and its relation to work and heat

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28. An isolated system is one that...

1. Exchanges mass but not energy

2. Exchanges energy but not mass

3. Is perfectly insulated

4. Exchanges neither mass nor energy

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29. Properties of a system are best described as being used to...

1. Define the state of the system

2. Describe how fast a process occurs

3. Measure work done by the system

4. Control reactions

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30. A system is said to be in equilibrium when...

1. Work output is zero

2. No net driving forces exist

3. Heat is transferred at a constant rate

4. Properties change very slowly

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