Multiple Choice Questions on Chemical Engineering | Objective Questions | Chemical Engineering Quiz | MCQ
1 >>In low or standard frequency induction furnace, heat is produced by the ?
- (A) combination of induced current and skin effect.
- (B) induction and resistance.
- (C) current flow through a heating element.
- (D) none of these.
2 >>Which furnace employs natural draft ? ?
- (A) Coke oven
- (B) Boiler
- (C) Rotary kilns
- (D) L.D. converter
3 >>Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a ?
- (A) furnace employing neutral atmosphere.
- (B) carbon resistance furnace.
- (C) reducing atmosphere.
- (D) furnace employing negative pressure.
4 >>Regenerators compared to the recuperators for the same duty ?
- (A) occupy more space
- (B) are less costly
- (C) are of smaller size
- (D) all (a), (b) and (c)
5 >>Regenerators are used for waste heat recovery in ?
- (A) by-product coke ovens
- (B) beehive coke oven
- (C) blast furnace stoves
- (D) soaking pits
6 >>Which of the following furnaces will have maximum thermal efficiency ? ?
- (A) Soaking pits
- (B) Walking beam reheating furnace
- (C) Boiler furnace
- (D) Rotary kilns
7 >>Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an ?
- (A) blast furnace.
- (B) steam boiler.
- (C) salt bath furnace.
- (D) annealing furnace.
chemical engineering Quiz | Chemical Engineering MCQ
8 >>In salt bath furnace, heat is transferred to the charge mainly by ?
- (A) conduction
- (B) convection
- (C) radiation
- (D) none of these
9 >>In order to maintain an oxidising atmosphere in a furnace, it should have ?
- (A) more of excess air
- (B) less of excess air
- (C) more of CO in flue gas
- (D) more of CO2 in flue gas
10 >>Combustion of fuel in a furnace with oxygen-enriched air results in higher ?
- (A) flue gas volume
- (B) flame temperature
- (C) fuel consumption
- (D) stack loss
11 >>Reducing atmosphere is maintained in a ?
- (A) calcination kiln
- (B) blast furnace
- (C) soaking pit
- (D) L.D. converter
12 >>Presence of SO2 in furnace gases attacks the ferrous metal by way of ?
- (A) accelerating the rate of scaling.
- (B) causing metal embrittlement.
- (C) attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature.
- (D) all (a), (b) and (c).
13 >>While the fuel-fired furnace can be used up to a maximum temperature of about 1700 Degree-C, the electric furnace can be used up to a temperature of about __________ DegreeC. ?
- (A) 2000
- (B) 3000
- (C) 4500
- (D) 6000
14 >>Advantages of the use of preheated combustion air are?
- (A) saving in fuel consumption.
- (B) reduction in scale losses.
- (C) increase in flame temperature.
- (D) all (a), (b) and (c).
15 >>Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the ?
- (A) physical nature, ash content and fineness of the coal.
- (B) amount of excess air supplied and load on the boiler.
- (C) type of burner and combustion chamber.
- (D) all (a), (b) and (c)
16 >>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) combustion of coal by supplying it around the burner.
- (D) preheating the primary air.
chemical engineering Quiz | Chemical Engineering MCQ
17 >>The heating capacity of continuous reheating furnace depends upon the ?
- (A) hearth area and furnace temperature.
- (B) emissivity of the stock.
- (C) ratio of wall surface to stock surface.
- (D) all (a), (b) and (c).
18 >>Fuel economy in an industrial furnace operation can not be achieved by the use of ?
- (A) stoichiometric combustion air.
- (B) non-preheated combustion air.
- (C) combustion air not enriched with oxygen.
- (D) recupterators.
19 >>The function of an economiser in a boiler is to preheat the ?
- (A) feedwater
- (B) combustion air
- (C) pulverised coal
- (D) furnace oil
chemical engineering Quiz | Chemical Engineering MCQ
20 >>Which furnace employs an I.D. fan for the removal of flue gases from the furnace ? ?
- (A) Coke oven.
- (B) Blast furnace stoves.
- (C) Beehive coke oven.
- (D) High pressure boiler.
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