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Home » Engineering » Chemical Engineering » Aptitude Test - 28
1.The cuprous chloride used in orsat apparatus can absorb__?
A. Only CO
B. Both CO and CO2
C. Both CO and O2
D. Only CO
2.A good metallurgical coke_?
A. Should have high porosity
B. Should be brittle
C. Should have low fusion point of its ash
D. Should have high porosity
3.__ has the widest inflammability limit (explosion limit) of all the gases?
A. Hydrogen
B. Carbon monoxide
C. Acetylene
D. Hydrogen
4.�Micum Index� of a coke is a measure of its_____?
A. Reactivity
B. Porosity
C. Bulk density
D. Reactivity
5.Calorific value of blast furnace gas is around ____ KCal/Nm3?
A. 850
B. 1800
C. 4200
D. 850
6.Which of the following would require least amount of secondary air for combustion ?
A. Coke breeze containing 25% ash and 2% volatile matter
B. Anthracite containing 10% volatile matter and 8% ash
C. Bituminous coal containing 20% ash and 25% volatile matter
D. Coke breeze containing 25% ash and 2% volatile matter
7.Bulk density of pulverised coal may be about ____ kg/m3?
A. 100
B. 500
C. 1000
D. 100
8.Bunsen burner is an example of a/an ______ burner?
A. Inside mixing/premix type
B. Submerged combustion
C. Rotary cup
D. Inside mixing/premix type
9.The main drawback of supplying more excess air in the combustion of fuel is the____?
A. Excessive power requirement of air blower
B. Excessive power requirement of air blower
C. Intermittent and uncontrolled combustion of the fuel
D. Excessive power requirement of air blower
10.The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?
A. Lower than
B. Higher than
C. Same as
D. Lower than
11.Largest constituent of coke oven gas is_____?
A. N2
B. H2
C. CH4
D. N2
12.Bomb calorimeter can be used to determine the _____ of the coal?
A. Sulphur content
B. Calorific value
C. Both A and B
D. Sulphur content
13.A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be___?
A. More
B. Less
C. Same
D. More
14.Combustion reaction of fuels is a/an ____ reaction?
A. Auto catalytic
B. Exothermic
C. Endothermic
D. Auto catalytic
15.In salt bath furnace, heat is transferred to the charge mainly by __?
A. Conduction
B. Convection
C. Radiation
D. Conduction
16.The heating capacity of muffle furnace depends on the___?
A. Surface area & emissivity of the stock
B. Properties of the muffle wall (temperature, area, and emissivity)
C. Both A. & B.
D. Surface area & emissivity of the stock
17.The heating capacity of muffle furnace depends on the__?
A. Surface area & emissivity of the stock
B. Properties of the muffle wall (temperature, area, and emissivity)
C. Both A. & B.
D. Surface area & emissivity of the stock
18.Furnace aerodynamics is related to the ____ in the furnace?
A. Movement of gases
B. Measurement of flue gas volume
C. Temperature control
D. Movement of gases
19.Which of the following is a periodic furnace ?
A. Tunnel kiln
B. Rotary kiln
C. Soaking pit
D. Tunnel kiln
20.Pulverised fuel fired furnaces employ _____ fuel firing?
A. Horizontal
B. Vertical
C. Tangential
D. Horizontal
21.Main gas valve in a gaseous fuel burner is a ____ valve?
A. Gate
B. Butterfly
C. Globe
D. Gate
22.Which is not a hearth furnace ?
A. Glass tank furnace
B. Open hearth furnace
C. Cupola
D. Glass tank furnace
23.Combustion of fuel in a furnace with oxygen enriched air results in higher__?
A. Flue gas volume
B. Flame temperature
C. Fuel consumption
D. Flue gas volume
24.Regenerators compared to the recuperators for the same duty___?
A. Occupy more space
B. Are less costly
C. Are of smaller size
D. Occupy more space
25.Ceramic recuperators compared to metallic recuperators for the same duty___?
A. Are lighter
B. Occupy more space
C. Are less costly
D. Are lighter
26.Rate of heat release in a furnace, which is the measure of heat intensity, is defined as__?
A. kcal/hr/m3 combustion space
B. kcal/m3 combustion space
C. kcal/hr
D. kcal/hr/m3 combustion space
27.Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the____?
A. Quantity & temperature of waste gas
B. Dust concentration & nature of dust in waste gas
C. Corrosive nature of the waste gas
D. Quantity & temperature of waste gas
28.Maximum heat transfer in high temperature furnaces is by___?
A. Conduction
B. Convection
C. Radiation
D. Conduction
29.Decarburisation of steel__?
A. Is the removal of carbon from iron carbide (Fe3C)
B. Affects its crystalline structure
C. Is favoured by CO2
D. Is the removal of carbon from iron carbide (Fe3C)
30.Hearth furnaces are not used for___?
A. Roasting
B. Melting
C. Reheating
D. Roasting
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