Maximum heat transfer rate can be expected in case of_________?
(A) Laminar flow
(B) Co-current flow
(C) Turbulent flow
(D) Heat flow rate is independent of nature of flow
Baffles are provided in heat exchangers to____________?
(A) Remove dirt
(B) Increase heat transfer rate
(C) Reduce vibrations
(D) Reduce heat transfer rate
Pick out the wrong statement ?
(A) Lug supports are less expensive than other type of supports
(B) A pipe is differentiated from a tube by the fact that a pipe has a greater wall thickness compared to the tube
(C) A reducer is used to change the direction of a pipe in a straight run
(D) The method of fixing tubes to a tube sheet by expanding is called ‘tube rolling’
A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?
(A) 3 kmole/hr
(B) 4 kmole/hr
(C) 5 kmole/hr
(D) 6 kmole/hr
The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal _____________ in the two phases?
(A) Potential energy
(B) Intermolecular forces
(C) Kinetic energy
(D) Total energy
Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________________?
(A) 20
(B) 32.2
(C) 45.35
(D) 58.65
At a temperature of 0°K, the molecules of a gas have only _______________ energy?
(A) Rotational
(B) Vibrational
(C) Translational
(D) None of these
On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ______________ gm?
(A) 82
(B) 164
(C) 41
(D) 8.2
Atmospheric pressure corresponds to a hydrostatic head of_________________?
(A) 13.6 cms of Hg
(B) 34 ft ofH2O
(C) 1 metre of H2O
(D) 13.6 metres of Hg