1000+ Thermodynamics Multiple Choice Questions and Answers Pdf - 3

Question: 11

Brayton cycles processes are

(A) one constant pressure, one constant volume, two adiabatic

(B) two isothermal constant volume a constant pressure

(C) two isentropic and two constant volume

(D) two isentropic and two constant pressure

Question: 12

The process can be closely approximated to

(A) adiabatic process

(B) isothermal process

(C) constant volume process

(D) constant pressure process

Question: 13

The efficiency of a Rankine cycle may be expected to

(A) increase with increasing exhaust pressure

(B) decrease with increasing temperature of heat rejection

(C) decrease with decreasing temperature of heat rejection

(D) increase with decreasing temperature difference of heat rejection

Question: 14

Heat is transferred from an insulated steam pipe to the surrounding still air by

(A) radiation

(B) conduction

(C) forced convection

(D) free convection

Question: 15

The unit of universal gas constant is

(A) dyne/K

(B) w/K

(C) kcal/K

(D) erg/K