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Home » Engineering » Chemical Engineering » Aptitude Test - 32
1.Large scale drying of wheat is done in a _____ dryer?
A. Fluidised bed
B. Spouted bed
C. Tray
D. Fluidised bed
2.With increase in the mass velocity of the gas, the rate of drying during the constant rate period ______________, if the conduction and radiation through the solid are negligible ?
A. Increases
B. Decreases
C. Remain same
D. Increases
3.Which of the following is not fixed by the process requirements, in the design of absorbers ?
A. Flow rate of the entering gas
B. Composition of the entering liquid
C. Terminal concentrations of gas stream
D. Flow rate of the entering gas
4.Molecular sieves are regenerated by heating to ____ �C?
A. < 150
B. 200-330
C. > 500
D. < 150
5.Co-current absorbers are usually used when the gas to be dissolved in the liquid is _____?
A. Sparingly soluble
B. Highly soluble
C. A pure substance
D. Sparingly soluble
6.In triangular co-ordinates, the ternary composition point falls ____ of the triangle?
A. In the corners
B. Inside
C. On the sides
D. In the corners
7.The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if__?
A. NSc = 1
B. NSc = NPr = NLe
C. NPr = NLe
D. NSc = 1
8.During sensible cooling process ___?
A. Relative humidity decreases
B. Relative humidity increases
C. Wet bulb temperature decreases
D. Relative humidity decreases
9.The boiling points of pure components of a binary system __________ with increase in total pressure of the system ?
A. Decreases
B. Increases
C. Remains unchanged
D. Decreases
10.Large scale usage of flash distillation is practised in ___?
A. Soap manufacturing
B. Ammonia synthesis plant
C. Polymerisation industry
D. Soap manufacturing
11.Pick�out�the�wrong�statement?
A. The toughness of a material decreases, when it is heated
B. Crane hooks are normally made of wrought iron
C. Cold working of a metal decreases its fatigue strength
D. The toughness of a material decreases, when it is heated
12.Pick�out�the�wrong�statement?
A. Pure rubber is as useless as pure gold as a material of construction
B. Thermal conductivity of aluminium is higher than that of copper; hence it is increasingly used for utensil making
C. Copper has poor weldability
D. Pure rubber is as useless as pure gold as a material of construction
13.Pick�out�the�wrong�statement?
A. Wrought iron contains about 0.02% carbon
B. Wrought iron cannot be easily forged and welded
C. The chilled cast iron does not contain graphite
D. Wrought iron contains about 0.02% carbon
14.Pick�out�the�correct�statement?
A. Stainless steel is nothing but chromium coated steel
B. Hardening of a soft metal can be done by alloying it with another metal or non-metal
C. Plastic deformation of a material is its temporary distortion under the action of applied stress
D. Stainless steel is nothing but chromium coated steel
15.Pick�out�the�wrong�statemen?
A. Hardening makes the steel more brittle
B. High alloy steels contain more than 50% alloying element
C. 18/8 stainless steel is a magnetic steel
D. Hardening makes the steel more brittle
16.Pick�out�the�wrong�statement�?
A. Alloys are harder than their component elements
B. Presence of silicon in steel decreases its electrical resistance
C. Karbate is an acid resistant material of construction
D. Alloys are harder than their component elements
17.Pick�out�the�wrong�statement?
A. Tin can be readily and very easily drawn into very fine wire
B. Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature
C. Tin exists in two allotropic forms
D. Tin can be readily and very easily drawn into very fine wire
18.Pick�out�the�wrong�statement?
A. Bronze is an alloy of copper & tin
B. Brass is an alloy of copper & zinc
C. The alloy named �German silver� does not contain any silver
D. Bronze is an alloy of copper & tin
19.The range of Mho�s scale of hardness is from ?
A. 1 to 15
B. 1 to 8
C. 1 to10
D. 1 to 15
20.possesses viscoelastic properties?
A. Cork
B. Glass
C. Graphite
D. Cork
21.Aluminium storage vessel can be used to store_?
A. Aqua regia
B. Ferrous sulphate
C. Hydrochloric acid (10%)
D. Aqua regia
22.Which of the following alloys does not contain nickel ?
A. Chlorinet � 2 alloy
B. Monel
C. Babbitt metal
D. Chlorinet � 2 alloy
23.Carbon percentage in medium carbon steel is around__?
A. 0.1 to 0.35
B. 0.35 to 0.5
C. 0.8 to 1.4
D. 0.1 to 0.35
24.Which of the following heat treatment processes is used for softening the hardened material ?
A. Normalising
B. Tempering
C. Annealing
D. Normalising
25.Interchain forces are the weakest in case of__?
A. Plastics
B. Fibres
C. Elastomers
D. Plastics
26.______ is never shipped in glass carboys?
A. Ammonia
B. Acetic acid
C. Phenol
D. Ammonia
27.Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)_?
A. Do not require heat treatment for any of its applications
B. Are used for leaf and coiled springs
C. Do not have good resilience properties
D. Do not require heat treatment for any of its applications
28.The fermenter used for the production of ethyl alcohol from molasses is made of____?
A. Wood
B. Concrete
C. Copper bearing steel
D. Wood
29.Mercury is transported in metal containers made of___?
A. Aluminium
B. Iron
C. Lead
D. Aluminium
30.Lead__?
A. Is the hardest metal in common use
B. Is the lightest metal in common use
C. Cannot be scratched by finger nails
D. Is the hardest metal in common use
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