1. linearly
2. rapidly first and then slowly
3. slowly first and then rapidly
4. inversely
rapidly first and then slowly
1. pulverizing coal in inert atmosphere
2. heating wood in a limited supply of air at temperatures below 300°C
3. strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
4. enriching carbon in the coal
strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
1. pulverizing coal in inert atmosphere
2. heating wood in a limited supply of air at temperatures below 3000C
3. strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
4. binding the pulverized coal into briquettes
strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
1. enthalpy
2. super-heating
3. supersaturation
4. latent heat
super-heating
1. constant volume
2. constant temperature
3. constant pressure
4. constant entropy
constant pressure
1. 9.81 Joules
2. 50 Joules
3. 427 Joules
4. 102 Joules
9.81 Joules
1. Ps-Pa
2. pa-ps
3. Pa+P
4. None
Pa+P
1. linearly
2. slowly first and then rapidly
3. rapidly first and then slowly
4. inversely
rapidly first and then slowly
1. the given boiler with the model
2. the two different boilers of the same make
3. two different makes of boilers operating under the same operating conditions
4. any type of boilers operating under any conditions
any type of boilers operating under any conditions
1. 0.1 to 0.2 kg
2. 0.2 to 0.4 kg
3. 0.6 to 0.8 kg
4. 1.0 to 1.5 kg
0.6 to 0.8 kg