ENGINEERING THERMODYNAMICS QUIZ

All of these

Temperature of the gas

Volume occupied by the gas

Pressure exerted by the gas

Heating the wood with a limited supply of air to temperature not less than 280°C

Moulding the finely ground coal under pressure with or without a binding material

None of these

Drying and crushing the coal to a fine powder

As steam

As ordinary vapour

Exactly as gas

Approximately as a gas

44138

44046

44142

44015

Mass does not cross boundaries of the system, though energy may do so

Both energy and mass cross the boundaries of the system

Neither mass nor energy crosses the boundaries of the system

Mass crosses the boundary but not the energy

Constant temperature

Constant pressure

Constant entropy

Constant volume

11/7

3/7

11/3

4/11

Steady change of pressures

High range of pressures

All ranges of pressures

Only small range of pressures

7 kg of water

9 kg of water

1 kg of water

8 kg of water

-237°C

273°C

-273°C

237°C