#### Thermodynamics

6

The value of one bar (in S. I. units) is equal to

A. 1 x 10^2 N//m^2
B. 1 x 10^3 N//m^2
C. 1 x 10^4 N//m^2
D. 1 x 10^5 N//m^2

7

The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and Î³ = Ratio of specific heats)

A. 1 - r^(Y -1)
B. 1 + r^(Y -1)
C. 1 - 1/r^(Y -1)
D. 1 +1/r^(Y -1)

8
The mass of carbon per kg of flue gas is given by
A. 11/3 CO_2 + 3/7 CO
B. 3/7 CO_2 + 11/3 CO
C. 7/3 CO_2 + 3/11 CO
D. 3/11 CO_2 + 7/3 CO

9
The polytropic index (n) is given by

A. (log(P_1P_2))/(log( V_1 V_2))
B. (log(P_2//P_1))/(log( V_1// V_2))
C. (log(V_1//V_2))/(log( P_1// P_2))
D. log ((P_1V_1)/(P_2V_2))

10

Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, Î³ = cp/cv, known as adiabatic index, and R = Gas constant)

A. C_v/C_p = R
B. C_p - C_v = R
C. C_v = (R)/((Y - 1))
D. Both (B) and (C)