# 2A2 Thermodynamics and Metallurgy

### Heat

1

Heat of 2 element system (Easy)

2

Heat of 2 element system with state change (Medium)

3

2 Part Heat of 4 individual elements with heat rate (Medium)

4

Heat of 3 element system (Hard)

5

Heat of 3 element system (Hard)

6

Heat of 3 element system with water equivalent (Hard)

7

Heat of 3 element system, all elements converted to dryness fraction of steam (Hard)

8

Heat of 3 element system, all elements converted to water (Hard)

9

Heat Section Quiz

### HEAT TRANSFER

2

Heat transfer through 1 wall (Easy)

3

Heat transfer through 2 walls (Easy)

4

Heat transfer through 3 walls (Easy)

5

Heat transfer through cylindrical wall (Easy)

6

Heat transfer through 3 walls no time with interface temps (Medium)

7

Heat transfer through 3 walls with no time or area with interface temps (Medium)

8

Heat transfer through 3 walls with added hypothetical air (Hard)

9

Heat Transfer Quiz

### THERMAL EXPANSION

1

Linear Expansion of Metals (Medium)

2

Difference in Expansion with cubical expansion (Medium)

3

Volumetric Expansion of a bisected Cylinder (Medium)

4

Three Step Linear Expansion of Metals (Hard)

5

Thermal Expansion Quiz

### PERFECT GASES

1

PV=mRT 3 steps 2 unkowns – Easy

2

PV=mrRT – Easy

3

PV/T=PV/T 2 part – Easy

4

P/T=P/T – Easy

5

PV=mrT with 2 unknowns combine equations – Medium

6

PV=mrT with 2 unknowns combine equations – Medium

7

Perfect Gases Quiz

### EXPANSION AND COMPRESSION OF GASES

1

Simple expansion of gas, find law of compression – Easy

2

Simple Compression of gas – Easy

3

Work Done Adiabatically and Isothermally – Easy

4

Work done adiabatically and polytropically – Easy

5

Work done – Easy

6

Final Volume and delta U – Easy

7

Expansion of gas and then expansion at constant pressure – Medium

8

RPM of a single acting air compressor – Medium

9

Two Air Receivers at different values are combined – Medium

10

Percentage of Stroke for air compressor with given ratio – Medium

11

Just Expansion of a Gas – Medium

12

Compression of gas and heat added – Medium

13

Find n, find change in enthalpy with given change in U – Medium

14

Work Done and delta U – Medium

15

Constant Pressure Heat Added, Calculate Mass, Specific Volume, Work Done, and Heat added – Medium

16

Constant Pressure Heat Added, Calculate Mass, R, Work Done, Heat Added and delta U – Medium

17

Compression of Gas, find delta U, Heat Added – Medium

18

Delta U, WD and Delta Enthalpy – Medium

19

Find percentage of stroke when delivery pressure attained – Medium

20

Gas Engine Compression Points Calculation – Hard

21

Cooling and Expansion of a Gas – Hard

22

Calculation of Clearance Volume – Hard

23

Find the percentage of stroke for which suction valve remains open – Hard

24

Compression of Air Adiabatically, 4 points, Volume Ratio, Using Temperatures, Heat Rejected – Very Hard

25

Expansion and Compression of Gases Quiz

### STEAM

1

Find the mean specific heat of superheated steam with interpolation – Medium

2

Calculate Total Volume of dry steam. Calculate true level in tank given gauge glass – Medium

3

Find the change in internal energy of throttled steam with no superheat – Medium

4

Calculate the dryness fraction of steam entering a condenser given heat lost=heat gained – Medium

5

Work Done and Final Volume of Superheated Steam Expanded in an engine – Hard

6

Mass Flow of superheated steam with added wet steam results in superheated steam – Hard

7

Find the power supplied by superheated steam by calculating Hg of SHS with mean specific heat – Hard

8

Find the amount of water injected to remove all superheat from steam – Hard

9

Amount of Power Supplied to turbine and thermal efficiency from SH steam to wet, low pressure – Hard

10

Amount of Power Supplied to turbine and thermal efficiency from SH steam to wet, low pressure – Hard

11

Superheated steam expanded. Find the actual specific volume and final volume – Hard

12

Calculate final dryness fraction and volume of throttled steam – Hard

13

Calculate dryness of exhaust steam given hotwell temperature in condenser – Hard

14

Calculate dryness, specific volume, and diameter of upstream/downstream piping with throttle valve – Hard

15

16

Mass Flow of superheated steam with added water results in saturated exhaust steam find mass – Hard

17

Wet steam is added to throttled superheated steam find mass of superheated steam – Hard

18

Water and steam is mixed in a feedwater heater find the masses of both – Hard

19

Rigid pressure vessel find delta U – Hard

20

Steam Quiz

### CALORIMETERS AND THERMAL EFFICIENCIES

1

Find Boiler Efficiency – Easy

2

Find maximum heat transferred with given equation and k value – Easy

3

Find final volume using e^n – Medium

4

Find Number of tonnes fuel burned per day given boiler efficiency – Medium

5

Net Work Transfer or Net Heat Transfer of Air in Isentropic Expansion – Hard

6

Find boiler efficiency of wet steam produced – Hard

7

Calorimetry and Thermal Efficiency Quiz

### CALORIMETRY THERMAL EFFICIENCIES AND TOTAL POWER

1

Calorimeter 1kg Coal – Easy

2

Exhaust Gas Heat Picked up by Cooling Water – Medium

3

Heat from Fuel Oil into 3 constituents through an engine – Hard

4

Firetube boiler, temp of gases leaving, efficiency – Medium

5

Flow, velocity, and total power – Medium

6

Flow, velocity, and total power – Hard

7

Flow, velocity and PV=mRT – Hard

### WELDING SYMBOLS AND CROSS-SECTIONS

1

Welding Symbols and Cross-Sections 1 – Medium

2

Welding Symbols and Cross-Sections 2– Medium

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