Chemical Engineering Basics Quiz 6
1 / 50
Heating the Hypo-eutectoid steels to 30?C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_________?
2 / 50
If a solid is compressed adiabatically in its elastic range, its ______ remains constant ?
3 / 50
In a forced draft cooling tower, water is cooled from 95 to 80?F by exposure to air with a wet bulb temperature of 70?F. In this case, the_________?
4 / 50
In a neutral solution___________?
5 / 50
In inventory control theory, the economic order quantity (EOQ) is the______?
6 / 50
In the blast furnace, incorporation of water vapour in the blast gives the following effect ?
7 / 50
In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of__________?
8 / 50
If Reynolds number is greater than 1, then the_______?
9 / 50
In Newton?s law of viscosity, which states that the shear stress is proportional to the ______ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?
10 / 50
In electrical resistance welding, distortion results from the use of improper_________?
11 / 50
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of___________?
12 / 50
Hot & cold working of material causes its ________ deformation?
13 / 50
In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that ?
14 / 50
In case of brasses, with decreasing zinc percentage and increasing copper percentage, its ______ increases ?
15 / 50
In practice, the compression ratio of compression-ignition (CI) engine ranges from ________?
16 / 50
Identify the correct statement with reference to the extractive metallurgy of aluminium ?
17 / 50
In case of water (Prandtl number ? 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is ?
18 / 50
High endurance limit of carburised machine parts is because of the fact that carburisation ___________?
19 / 50
Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by ______ have residual stresses ?
20 / 50
Hydro-cyclone is a______?
21 / 50
Heat transfer by _______ is almost absent in case of fluidised bed drying operation?
22 / 50
In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is___________?
23 / 50
If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a ______ reactor?
24 / 50
In a good rimming steel___________?
25 / 50
High speed steel tools retain their hardness upto a temperature of ___________ ?C?
26 / 50
High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27?C with relative humidity ranging from ________ percent ?
27 / 50
In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will ________?
28 / 50
In extrusion of metals, which of the following statement is true ?
29 / 50
In the diving apparatus, helium is used along with oxygen, because it is ______?
30 / 50
In ?Imperial Smelting Process? for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following _________?
31 / 50
In chemical dehumidification of air_____?
32 / 50
In a furnace with heating element temperature at 1700?C, the dominant mechanism of heat transfer will be___________?
33 / 50
Heating of ferromagnetic materials to a temperature above Curie temperature makes it __________?
34 / 50
If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity__________?
35 / 50
Identify the false statement?
36 / 50
Hot working of lead is carried out at _____?
37 / 50
In case of simple harmonic motion, displacement is proportional to the__________?
38 / 50
Hooke?s law_________?
39 / 50
In case of a, centrifugal pump, the ratio h1/h2 is termed as the ______ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?
40 / 50
In connection with corrosion of metals, passivation is the process that___________?
41 / 50
In multipass welds, shot peening is done after each pass to___________?
42 / 50
Hot extrusion of aluminium is done in the temperature range of _________ ?C ?
43 / 50
Hydrogen in liquid steels is dissolved__________?
44 / 50
Highest cutting speed is achieved by the ________ tool material ?
45 / 50
Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?
46 / 50
In _________ process, there is an increase in entropy with no degradation of energy ?
47 / 50
In the Bayer?s process, bauxite is digested under pressure using _____?
48 / 50
In a totally irreversible isothermal expansion process for an ideal gas, ?E = 0, ?H = 0. Then ?Q and ?S will be________?
49 / 50
In the acid Bessemer process, the hot metal should have the following composition ?
50 / 50
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by__________?
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