Question 31. All engineering students should learn mechanics, mathematics and how to do computation.                   I                                        II                                          III                              IV Which of the above underlined parts of the sentence is not appropriate?

Question 32. The thermodynamic state of a closed system containing a pure fluid changes from (T1, p1) to (T2, p2), where T and p denote the temperature and pressure, respectively. Let Q denote the heat absorbed (> 0 if absorbed by the system) and W the work done (> 0 if done by the system). Neglect changes in kinetic and potential energies. Which one of the following is CORRECT?

Question 33. The units of the isothermal compressibility are

Question 34. An equation of state is explicit in pressure p and cubic in the specific volume v. At the critical point 'c', the isotherm passing through 'c' satisfies

Question 35. The apparent viscosity of a fluid is given by 0.007 |dV/dy|0.3 where (dV/dy) is the velocity gradient. The fluid is

Question 36. The effectiveness of a heat exchanger in the &NTU method is defined as

Question 37. In a pool boiling experiment, the following phenomena were observed. P. Natural convection Q. Film boiling R. Transition boiling S. Nucleate boiling What was the CORRECT sequence of their occurrence?

Question 38. A hole of area 1 cm2 is opened on the surface of a large spherical cavity whose inside temperature is maintained at 727 oC. The value of Stefan-Boltzmann constant is 5.67 * 10-8 W/m2 - K4. Assuming black body radiation, the rate at which the energy is emitted (in W) by the cavity through the hole, up to 3 digits after the decimal point, is ________

Question 39. A wet solid is dried over a long period of time by unsaturated air of nonzero constant relative humidity. The moisture content eventually attained by the solid is termed as the

Question 40. The packing of an existing absorption tower is replaced with a new type of packing. The height of the packing and the inlet conditions are maintained the same as before. Tests reveal that the number of transfer units is lower than before. This indicates that the tower with the new packing, when compared to that with the old packing, will