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Question 1 of 15
The Bode stability criterion is applicable whenCorrect
Question 2 of 15
An insulated, evacuated container is connected to a supply line of an ideal gas at pressure P , temperature T and specific volume V . The container is filled with the gas until the pressure in the container reaches P . There is no heat transfer between the supply line to the container, and kinetic
and potential energies are negligible. If Pc and Vc are the heat capacities at constant pressure and constant volume, respectively (Cp/Cv = A ), then the final temperature of the gas in the container isCorrect
Question 3 of 15
Heat is generated at a steady rate of 100 W due to resistance heating in a long wire (length = 5 m, diameter = 2 mm). This wire is wrapped with an insulation of thickness 1 mm that has a thermal conductivity of 0.1 W/m.K. The insulated wire is exposed to air at 30°C. The convective heat
transfer between the wire and surrounding air is characterized by a heat transfer coefficient of 10 W/m2.K. The temperature (in °C) at the interface between the wire and the insulation isCorrect
Question 4 of 15
In a counter-flow double pipe heat exchanger, oil (m = 2 kg/s, P C = 2.1 kJ/kg.°C) is cooled from 90 °C to 40 °C by water (m = 1 kg/s, P C = 4.2 kJ/kg.°C) which enters the inner tube at 10 °C. The radius of the inner tube is 3 cm and its length is 5 m. Neglecting the wall resistance, the overall heat
transfer coefficient based on the inner radius, in kW/ m2.K, isCorrect
Question 5 of 15
An equimolar mixture of A and B (A being more volatile) is flash distilled continuously at a feed rate of 100 kmol/h, such that the liquid product contains 40 mol % of A. If the relative volatility is 6, then the vapor product, in kmol/h, isCorrect
Question 6 of 15
A thermocouple having a linear relationship between 0 degree C and 350 degree C shows an emf of zero and 30.5 mV, respectively at these two temperatures. If the cold junction temperature is shifted from 0 degree C to 30 degree C, then the emf correction (in mV) isCorrect
Question 7 of 15
Heat integration is planned in a process plant at an investment Rs. 2,000,000 . This would result in a net energy savings of 20 GJ per year. If the nominal rate of interest is 15% and the plant life is 3 years, then the breakeven cost of energy, in Rs. per GJ (adjusted to the nearest hundred), isCorrect
Question 8 of 15
na 1-1 pass floating head type shell and tube heat exchanger, the tubes (od = 25 mm; id = 21 mm) are arranged in a square pitch. The tube pitch is 32 mm. The thermal conductivity of the shell side fluid is 0.19 W/m.K, and the Nusselt number is 200. The shell-side heat transfer coefficient (in W/m2.K), rounded off to the nearest integer, isCorrect
Question 9 of 15
Match the process in Group I with the catalyst in Group II
P. Fischer-Tropsch synthesis
Q. Formaldehyde from methanol
R. Hydrogenation of vegetable oils
S. Dehydrogenation of ethylbenzene
Question 10 of 15
Match the polymer in Group I to the polymer characteristic in Group II
Q. Phenol-formaldehyde polymer
IV. Thermosetting polymerCorrect
Question 11 of 15
Gradient of a scalar variable is alwaysCorrect
Question 12 of 15
If f (x) is a real and continuous function of x, the Taylor series expansion of f (x) about its minima will NEVER have a term containingCorrect
Question 13 of 15
From the following list, identify the properties which are equal in both vapour and liquid phases at equilibrium
P. Density Q. Temperature
R. Chemical potential S. EnthalpyCorrect
Question 14 of 15
In order to achieve the same conversion under identical reaction conditions and feed flow rate for a non-autocatalytic reaction of positive order, the volume of an ideal CSTR isCorrect
Question 15 of 15
In a completely opaque medium, if 50% of the incident monochromatic radiation is absorbed, then
which of the following statements are CORRECT?
P. 50% of the incident radiation is reflected
Q. 25% of the incident radiation is reflected
R. 25% of the incident radiation is transmitted
S. No incident radiation is transmittedCorrect