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Home » Engineering » Chemical Engineering » Aptitude Test - 27
1.In Newton�s law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is____?
A. 0.44
B. 0.044
C. 4.4
D. 0.44
2.A tube is specified by its_____?
A. Thickness only
B. Outer diameter only
C. Inner diameter
D. Thickness only
3.Poise is converted into stoke by _?
A. Multiplying with density (gm/c.c)
B. Dividing by density (gm/c.c)
C. Multiplying with specific gravity
D. Multiplying with density (gm/c.c)
4.Slurries can be most conveniently pumped by a ______ pump?
A. Screw
B. Reciprocating
C. Gear
D. Screw
5.Caking index of a coal is a measure of its __?
A. Abradability
B. Reactivity
C. Porosity
D. Abradability
6.Main component of sewage gas produced during anaerobic decomposition of organic waste (by suitable bacteria) during sewage disposal is ____?
A. H2
B. CH4
C. CO2
D. H2
7.The shift conversion reaction taking place during water gas manufacture is given by_____?
A. C + H2O ? CO + H2
B. C + 2H2O ? CO2 + 2H2
C. CO + H2O ? CO2 + H2
D. C + H2O ? CO + H2
8.___ of the coal is the basis for Seylor�s coal classification?
A. Proximate analysis
B. Ultimate analysis
C. Caking index
D. Proximate analysis
9.In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of___?
A. Transportation of coal
B. Drying of coal
C. Preheating the primary air
D. Transportation of coal
10.In flue gas analysis by Orsat�s apparatus, carbon monoxide is absorbed by___?
A. Cuprous chloride
B. Potassium hydroxide
C. Alkaline pyrogallol solution
D. Cuprous chloride
11.Washing of coal decreases its___?
A. Caking index
B. Ash content
C. Mineral matter content
D. Caking index
12.To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in__?
A. Shallow and small piles
B. Fine sizes without the presence of any lump
C. Closed space without any ventilation facility
D. Shallow and small piles
13.The gas which contributes maximum to the heating value of natural gas is?
A. CO
B. CO2
C. H2
D. CO
14.Nitrogen in coal____?
A. Is present upto 1-2%
B. Comes from protein in parent vegetable matter
C. Is recovered as ammonia during its carbonisation
D. Is present upto 1-2%
15.A coal having high volatile matter content will __?
A. Give less yield of tar and gas on carbonisation
B. Burn with a small non-smoky flame
C. Have a very high calorific value
D. Give less yield of tar and gas on carbonisation
16.Mott and Wheeler test is conducted on coke to find its ___?
A. Reactivity with O2
B. Abradability
C. Phosphorus content
D. Reactivity with O2
17.Coal is pulverised before burning in large capacity boiler furnaces mainly to_?
A. Ensure its complete combustion
B. Facilitate easy ash removal
C. Enhance its calorific value
D. Ensure its complete combustion
18.Laboratory gas is obtained by the cracking of___?
A. Gasoline
B. Diesel
C. Fuel oil
D. Gasoline
19.�Wind loss� resulting from unscientific storage of coal may be the order of about ____ percent?
A. 2.5
B. 7.5
C. 10.5
D. 2.5
20.Caking index of the coal blend used for the manufacture of metallurgical coke should be around___?
A. 5
B. 21
C. 40
D. 5
21.Main constituent of the gas produced from a gobar gas plant is_?
A. CO2
B. CH4
C. H2
D. CO2
22.Cannel coal and boghead coal are the examples of __?
A. Humic coals
B. Liptobiolites
C. Sapropelic coals
D. Humic coals
23.Which of the following is not endothermic ?
A. Cracking
B. Reforming
C. Gasification
D. Cracking
24.Gross calorific value will be equal to the net calorific value for ____?
A. H2
B. C2H2
C. CO
D. H2
25.Optimum preheating temperature for pitch creosote mixture (PCM) which is also termed as C.T.F-200, before atomisation through burners is___?
A. 200 �F
B. 200 �C
C. 200 �K
D. 200 �F
26.The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be__?
A. 27.6
B. 23
C. 47.3
D. 27.6
27.The hottest part of the flame lies in its ____ zone?
A. Non-luminous
B. Luminous
C. Yellow
D. Non-luminous
28.Highly caking coals___?
A. Produce weak coke
B. Produce strong coke
C. May damage the coke oven walls during carbonisation
D. Produce weak coke
29.L.D. converter gas (produced in steel plant) comprises mainly of __?
A. CO (upto 65%) & CO2
B. CO2 & H2
C. CO & O2
D. CO (upto 65%) & CO2
30.A gaseous fuel in order to develop luminosity on burning, must contain ____?
A. Carbon monoxide
B. Hydrocarbons
C. Hydrogen
D. Carbon monoxide
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