Thermodynamics

1

The general law for the expansion or compression of gases, is


A. PV = C
B. PV = mRT
C. `PV^n = C`
D. `PV^Y = C`

2

The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

A. `R_u xx T`
B. `1.5R_u xx T`
C. `2R_u xx T`
D. `3R_u xx T`

3

In a reversible adiabatic process, the ratio of T1/T2 is equal to

A. `(P_2/P_1)^(Y -1//Y)`
B. `(P_1/P_2)^(Y -1//Y)`
C. `(V_2/V_1)^(Y -1//Y)`
D. `(V_1/V_2)^(Y -1//Y)`

4

The mass of excess air supplied is equal to 

A. `23/100` x Mass of excess carbon
B. `23/100` x Mass of excess oxygen
C. `100/23` x Mass of excess carbon
D. `100/23`x Mass of excess oxygen

5
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)
A. `T_1/T_2 - 1`
B. `1 - T_1/T_2`
C. `1 - T_2/T_1`
D. `1+T_2/T_1`