Chemical Heat Transfer Quiz 2
1 / 50
Boiling point elevation of an ideal solution________?
2 / 50
Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is_________?
3 / 50
Corrosiveness of steam condensate is due to the presence of_________?
4 / 50
Cp?/K is termed as the _______ number?
5 / 50
Boiling of milk in an open vessel is an example of _______ boiling?
6 / 50
Dittus-Boelter equation used for the determination of heat transfer co-efficient is valid _____?
7 / 50
Choose the correct equation ?
8 / 50
Colburn analogy is applicable for the value of Prandtl number from__________?
9 / 50
Crystal size in a continuous crystalliser depends upon the_____?
10 / 50
Circulation pump is located below the evaporator to_____?
11 / 50
Crystallisation of solids from a homogeneous solution is a/an _______ process?
12 / 50
Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is ___________?
13 / 50
Boiling point elevation for a strong and concentrated solution is found by Duhring?s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the ________ of pure water?
14 / 50
Convective heat transfer, in which heat is transferred by movement of warmed matter is described by_____?
15 / 50
Boiling point of a solution according to Duhring?s rule is a linear function of the ______ of water?
16 / 50
Conductance is given by (where, x = thickness, A = heat flow area, K = thermal conductivity.)?
17 / 50
Boiling point elevation of a solution of NaOH _______?
18 / 50
Evaporation by thermo compression results in the ___________?
19 / 50
Baffles are provided in heat exchangers to increase the_________?
20 / 50
Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube_____?
21 / 50
Choose the most important factor on which the heat conducted through a wall in a unit time will depend on ?
22 / 50
At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the_____?
23 / 50
Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the ______ zone?
24 / 50
Black liquor generated during paper manufacture is concentrated in a_____?
25 / 50
Critical value of the ______ number governs the transition from laminar to turbulent flow in free convection heat transfer?
26 / 50
As per Kirchoff?s law, the ratio of the total radiating power to the absorptivity of a body depends on the________?
27 / 50
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ?
28 / 50
Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ______?
29 / 50
During crystallisation, formation of crystal can occur in _______ solution only?
30 / 50
Baffles are provided in heat exchangers to_____?
31 / 50
Economy of a multiple effect evaporator depends upon the _______?
32 / 50
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the_________?
33 / 50
Dittus-Boelter equation cannot be used for molten metals mainly due to its very low_______?
34 / 50
Evaporation of 1kg of water from a solution in a single effect evaporator requires about _________ kg of steam?
35 / 50
Duhring?s rule is important in solving problems on___________?
36 / 50
Economy of an evaporator is influenced by the_______?
37 / 50
Dropwise condensation occurs on _______ surfaces?
38 / 50
Electro-magnetic spectrum range, which is important for radiation varies from ______ microns?
39 / 50
Double pipe heat exchangers are preferably useful, when______?
40 / 50
Dropwise condensation is promoted on a/an _______ surface?
41 / 50
At constant temperature, the thermal conductivities of gases ______ with rise in pressure?
42 / 50
Baffles in the shell side of a shell and tube heat exchanger ?
43 / 50
Correction is applied to LMTD for __________ flow?
44 / 50
Controlling heat transfer film co-efficient is the one, which offers _______ resistance to heat transfer?
45 / 50
At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?
46 / 50
Electromagnetic radiations propagate in vacuum with a velocity of ________ metre/second?
47 / 50
Evaporator tubes are generally_______?
48 / 50
Baffle spacing ______?
49 / 50
Double pipe heat exchangers are used___________?
50 / 50
Economy of a multiple effect evaporator is not influenced much by the_________?
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