Question $1$: An inverse Carnotcycle consumes $5kW$ of electricity and extracts $60kW$ of energy from a room at $4C.$ What is the temperature of the room where the heat is emitted?

A:

B:

C: $40CT$

D: We can't say

anything for sure

Question $2$: What happens to the specific entropy of air when it passes through a cooled irreversible compressor?

$\backslash$table$[[\backslash$table$[[$A: The entropy will$],[$decrease$]],\backslash$table$[[$B: The entropy will$],[$remain the same$]],\backslash$table$[[$C: the entropy will$],[$increase$]],\backslash$table$[[$D: We don't have$],[$enough data to know$],[$what$\text{'}$s happening.$]]]]$

Question $3$: An ideal gas passes through an expansion valve. How will the pressure and temperature change during this process.

$A$:$P>0,T>0$

B:

C: $P>0,T<mn\; id="EditorElement\_1185714">0</mn>$

$D$:

Question $4$: What is the main reason to use reheating in a Rankine cycle?

$\backslash$table$[[\backslash$table$[[$A: Increasing thermal$],[$efficiency$]],$B: Reducing the $q_{in},$C: Reducing $q_{\text{u}\text{i}\text{t}},\backslash$table$[[$D: Reducing the$],[$moisture content in$],[$the turbine$]]]]$

Question $5$: A $2-$stroke diesel engine with $4$ cylinders runs at $3000rpm.$ The net labor per diesel cycle is$.$ What is the power of this engine? $1kJ$

A: $50kW$

B: $100kW$

C: $200kW$

D: $400kW$

Question $6$: Which pronunciation is correct for a dual cycle with a fixed compression ratio.r

$\backslash$table$[[\backslash$table$[[$A: The larger, the$],[$more the cycle$],[$resembles a diesel$],[$cycler ${?}_C$