Heat and work are ____________________?

Related Mcqs:

1. A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is__________________?

   A. justified
   B. not possible
   C. may be possible with lot of sophistications
   D. cost will be very high
   E. theroretically possible

2. A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be___________________?

   A. 300 Nm
   B. 300,000 Nm
   C. 30 Nm
   D. 3000 Nm
   E. 30,000 Nm

3. The unit of mass in S.I. units is ____________________?

   A. kilogram
   B. gram
   C. tonne
   D. quintal
   E. newton

4. The condition of perfect vacuum, i.e., absolute zero pressure can be attained at ____________________?

   A. a temperature of – 273.16°C
   B. a temperature of 0°C
   C. a temperature of 273 °K
   D. a negative pressure and 0°C temperature
   E. can’t be attained

5. According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant ____________________?

   A. Joule’s law
   B. Boyle’s law
   C. Regnault’s law
   D. Gay-Lussac law
   E. Charles’ law

6. Which of the following items is not a path function ____________________?

   A. heat
   B. work
   C. kinetic energy
   D. vdp
   E. thermal conductivity

7. Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be ____________________?

   A. 4.17m3/kgmol
   B. 400 m3/kg mol
   C. 0.15 m3/kg mol
   D. 41.7 m3/kg mol
   E. 417m3/kgmol

8. Change in enthalpy of a system is the heat supplied at___________________?

   A. constant pressure
   B. constant temperature
   C. constant volume
   D. constant entropy
   E. N.T.P. condition

9. Total heat of a substance is also known as __________________?

   A. internal energy
   B. entropy
   C. thermal capacity
   D. enthalpy
   E. thermal conductance

10. Which law states that the specific heat of a gas remains constant at all temperatures and pressures______________________?

    A. Charles’ Law
    B. Joule’s Law
    C. Regnault’s Law
    D. Boyle’s Law
    E. there is no such law