Join Us ::

Menu Home Classes GK Engineering Past Papers Current Affairs Technical GAT Subject Programming Medical Papers

Engineering :: All Aptitude Test ::

Home » Engineering » Aptitude Test - 106
Hassan
1.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
2.Laboratory gas is obtained by the cracking of___?
A. Gasoline
B. Diesel
C. Fuel oil
D. Gasoline
3.‘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
4.Caking index of the coal blend used for the manufacture of metallurgical coke should be around___?
A. 5
B. 21
C. 40
D. 5
5.Main constituent of the gas produced from a gobar gas plant is_?
A. CO2
B. CH4
C. H2
D. CO2
6.Cannel coal and boghead coal are the examples of __?
A. Humic coals
B. Liptobiolites
C. Sapropelic coals
D. Humic coals
7.Which of the following is not endothermic ?
A. Cracking
B. Reforming
C. Gasification
D. Cracking
8.Gross calorific value will be equal to the net calorific value for ____?
A. H2
B. C2H2
C. CO
D. H2
9.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
10.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
11.The hottest part of the flame lies in its ____ zone?
A. Non-luminous
B. Luminous
C. Yellow
D. Non-luminous
12.Highly caking coals___?
A. Produce weak coke
B. Produce strong coke
C. May damage the coke oven walls during carbonisation
D. Produce weak coke
13.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
14.A gaseous fuel in order to develop luminosity on burning, must contain ____?
A. Carbon monoxide
B. Hydrocarbons
C. Hydrogen
D. Carbon monoxide
15.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
16.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
17.__ has the widest inflammability limit (explosion limit) of all the gases?
A. Hydrogen
B. Carbon monoxide
C. Acetylene
D. Hydrogen
18.“Micum Index” of a coke is a measure of its_____?
A. Reactivity
B. Porosity
C. Bulk density
D. Reactivity
19.Calorific value of blast furnace gas is around ____ KCal/Nm3?
A. 850
B. 1800
C. 4200
D. 850
20.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
21.Bulk density of pulverised coal may be about ____ kg/m3?
A. 100
B. 500
C. 1000
D. 100
22.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
23.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
24.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
25.Largest constituent of coke oven gas is_____?
A. N2
B. H2
C. CH4
D. N2
26.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
27.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
28.Combustion reaction of fuels is a/an ____ reaction?
A. Auto catalytic
B. Exothermic
C. Endothermic
D. Auto catalytic
29.In salt bath furnace, heat is transferred to the charge mainly by __?
A. Conduction
B. Convection
C. Radiation
D. Conduction
30.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
Related Subjects

Date to Date Current Affairs 2022

PakMCQs.net

Quick Links

GAT Subject



   Computer Science    English Mcqs    Agriculture    

Engineering



   Computer Science    Civil Engineering    

Technical



   Networking    Electronics    Database    

Past Papers



   Model Papers    FPSC Papers    
Our Team | Career | Contact | JoinUs | Privacy Policy | DMC

© 2020-2024 by Pak-MCQs.net All Rights Reserved.

Email: [email protected]