8247 + Mcqs in Chemical Engineering Page 111 McqOptions

5501.	Heat of neutralisation of HCl and NaOH is - 57.46 kJ/Kg mole. The heat of ionisation of water will be __________ kJ/Kg mole.
A.	57.46
B.	-57.46
C.	114.92
D.	-28.73
Answer» B. -57.46

Discussion

5502.	The heat evolved in the combustion of benzene is represented by the equation: C6H6 + 7.5 O2 = 6CO2 + 3H2O, H = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be __________ kJ/kgmole.
A.	+816.15
B.	+1632.3
C.	-1632.3
D.	-2448.45
Answer» D. -2448.45

Discussion

5503.	If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.
A.	10
B.	20
C.	70
D.	100
Answer» B. 20

Discussion

5504.	A sugar solution containing __________ percent sugar is equivalent to 1 Brix.
A.	0.01
B.	0.1
C.	1
D.	10
Answer» D. 10

Discussion

5505.	__________ equation gives the effect of temperature on heat of reaction.
A.	Kirchoffs
B.	Maxwell's
C.	Antonie
D.	Kistyakowsky
Answer» B. Maxwell's

Discussion

5506.	Which of the following has the smallest least effect on the solubility of a solute into the solvent ?
A.	Nature of the solute
B.	Nature of the solvent
C.	Temperature
D.	Pressure
Answer» E.

Discussion

5507.	1 Kcal/kg. C is equivalent to __________ BTU/lb. F.
A.	1
B.	2.42
C.	4.97
D.	none of these
Answer» B. 2.42

Discussion

5508.	The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
A.	Trouton's rule
B.	Kopp's rule
C.	Antonie equation
D.	Kistyakowsky equation
Answer» C. Antonie equation

Discussion

5509.	How many phases are present at eutectic point ?
A.	1
B.	2
C.	3
D.	unpredictable
Answer» D. unpredictable

Discussion

5510.	The increase in the temperature of the aqueous solution will result in decrease of its
A.	weight % of the solute.
B.	mole fraction of the solute.
C.	molarity.
D.	molality.
Answer» D. molality.

Discussion

5511.	Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
A.	<img src="/_files/images/chemical-engineering/process-equipment-and-plant-design/569-143-1.png">
B.	<img src="/_files/images/chemical-engineering/process-equipment-and-plant-design/569-143-2.png">
C.	<img src="/_files/images/chemical-engineering/process-equipment-and-plant-design/569-143-3.png">
D.	<img src="/_files/images/chemical-engineering/process-equipment-and-plant-design/569-143-4.png">
Answer» B. <img src="/_files/images/chemical-engineering/process-equipment-and-plant-design/569-143-2.png">

Discussion

5512.	In condenser, the cooling water is passed in the tube side in a pass arrangement, because
A.	it reduces heat transfer area.
B.	more thinner tubes can be used.
C.	pressure drop is reduced.
D.	it makes condenser compact.
Answer» B. more thinner tubes can be used.

Discussion

5513.	In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.
A.	1/10-1/15th
B.	1/5-1/10th
C.	1/20-1/30th
D.	1/2 to 1/4th
Answer» B. 1/5-1/10th

Discussion

5514.	Height of the flights in the rotary drier is in the range of
A.	0.08 to 0.12 d
B.	0.02 to 0.05 d
C.	0.2 to 0.5 d
D.	0.5 to 0.6 d
Answer» B. 0.02 to 0.05 d

Discussion

5515.	Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.
A.	0.1 to 0.3
B.	0.6 to 0.7
C.	0.85 to 0.95
D.	1.5 to 2
Answer» C. 0.85 to 0.95

Discussion

5516.	Maximum allowable vapour velocity in a bubble cap tower is determined by the
A.	entrainment considerations.
B.	vapour density.
C.	diameter of the column.
D.	none of these.
Answer» B. vapour density.

Discussion

5517.	Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is
A.	more
B.	less
C.	same
D.	more or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein.
Answer» C. same

Discussion

5518.	The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.
A.	0.1-0.2
B.	0.2-0.5
C.	0.4-0.9
D.	1.2-1.5
Answer» D. 1.2-1.5

Discussion

5519.	Thickness of the frame of a plate and frame filter as compared to that of plates is
A.	less
B.	same
C.	more
D.	either (a) or (b)
Answer» D. either (a) or (b)

Discussion

5520.	Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?
A.	Size, shape, orientation and surface of the packing particles.
B.	Density and viscosity of fluids.
C.	Fluid flow rates.
D.	All (a), (b) and (c).
Answer» E.

Discussion

5521.	The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.
A.	0.3 to 0.8
B.	1.25 to 3.125
C.	3.5 to 7.0
D.	8-12
Answer» C. 3.5 to 7.0

Discussion

5522.	Rivets are generally specified by the
A.	head diameter
B.	shank diameter
C.	overall length
D.	none of these
Answer» C. overall length

Discussion

5523.	Length to diameter ratio of most rotary driers is in the range of
A.	1 to 2
B.	4 to 10
C.	10 to 20
D.	20 to 30
Answer» C. 10 to 20

Discussion

5524.	Floating head heat exchangers are used for the
A.	heat transfer between corrosive fluids.
B.	cases where temperature difference between the shell and the tubes is more (>50 C).
C.	co-current heat transfer systems.
D.	counter-current heat transfer systems.
Answer» C. co-current heat transfer systems.

Discussion

5525.	The most common standard size of bubble caps used in industrial operation is
A.	1" dia cap with 0.5" dia riser.
B.	6" dia cap with 4" dia riser.
C.	8" dia cap with 1" dia riser.
D.	4" dia cap with 8" dia riser.
Answer» C. 8" dia cap with 1" dia riser.

Discussion

5526.	Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.
A.	nozzle or rim
B.	flared out
C.	fluid in
D.	ring plate
Answer» B. flared out

Discussion

5527.	In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.
A.	1
B.	8
C.	80
D.	180
Answer» C. 80

Discussion

5528.	Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.
A.	Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution.
B.	Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids.
C.	The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty.
D.	In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes.
Answer» D. In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes.

Discussion

5529.	for fully open gate valves would be
A.	much more than that for fully open globe valves.
B.	much less (say 2% than that for fully open globe valves).
C.	around 7.
D.	both (b) and (c).
Answer» E.

Discussion

5530.	LMTD correction factor is used in heat exchanger design for
A.	double pipe heat exchanger.
B.	multipass shell and tube heat exchanger.
C.	fouling fluids.
D.	counter flow of hot and cold fluids.
Answer» C. fouling fluids.

Discussion

5531.	Older crude petroleum
A.	is light and better.
B.	gives more distillates.
C.	gives less tar.
D.	all (a), (b) and (c).
Answer» C. gives less tar.

Discussion

5532.	Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene ?
A.	Reforming
B.	Pyrolysis
C.	Alkylation
D.	Hydrocracking
Answer» B. Pyrolysis

Discussion

5533.	Diesel index is defined as
A.	( API) x (Aniline Point, F)/100
B.	( API) x (Aniline Point, C)/100
C.	( API) x (100)/Aniline Point, F
D.	( API) x (100)/Aniline Point, C
Answer» B. ( API) x (Aniline Point, C)/100

Discussion

5534.	Alkylation
A.	causes olefins to combine with each other.
B.	causes olefins to combine with iso-paraffins.
C.	converts iso-paraffin into olefin.
D.	converts olefin into paraffin.
Answer» C. converts iso-paraffin into olefin.

Discussion

5535.	Which of the following has the maximum API gravity of all?
A.	Diesel
B.	Kerosene
C.	Petrol
D.	Furnace oil
Answer» D. Furnace oil

Discussion

5536.	Petroleum coke is used mainly .in the
A.	discoloration of yellow glycerine.
B.	sugar refining.
C.	manufacture of carbon electrode.
D.	blast furnace for reduction of iron ore.
Answer» D. blast furnace for reduction of iron ore.

Discussion

5537.	Research octane number refers to the
A.	low octane number motor fuels.
B.	high octane number motor fuels.
C.	high octane number aviation fuels.
D.	unleaded motor fuels.
Answer» E.

Discussion

5538.	In catalytic alkylation, higher iso-butane to olefin ratio gives
A.	low final boiling point product
B.	higher yield
C.	both (a) and (b)
D.	neither (a) nor (b)
Answer» B. higher yield

Discussion

5539.	In case of liquid petrofuels, momentary combustion is observed at its
A.	flash point.
B.	preheating temperature corresponding to viscosity of 25 centistokes.
C.	flame temperature.
D.	fire point.
Answer» B. preheating temperature corresponding to viscosity of 25 centistokes.

Discussion

5540.	Polymerisation
A.	produces i-octane from cracked gases containing i-butane and butene.
B.	causes olefins to combine with each other.
C.	causes aromatics to combine with each other.
D.	is aimed at producing lubricating oil.
Answer» C. causes aromatics to combine with each other.

Discussion

5541.	The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol.
A.	3
B.	300
C.	3000
D.	1000
Answer» B. 300

Discussion

5542.	Which of the following is the most widely used cracking process in oil refineries ?
A.	Dubbs process.
B.	T.C.C. moving bed process.
C.	Fluidised bed catalytic cracking process.
D.	Houdry's fixed bed process.
Answer» D. Houdry's fixed bed process.

Discussion

5543.	Catalyst used in the catalytic polymerisation is
A.	phosphoric acid on kieselghur
B.	aluminium chloride
C.	nickel
D.	vanadium pentaoxide
Answer» B. aluminium chloride

Discussion

5544.	Petroleum liquid fuels having flash point greater than 66 C is considered as safe during storage and handling. Which of the following has flash point > 66 C ?
A.	Naphtha
B.	Petrol
C.	Kerosene
D.	Heavy fuel oil
Answer» E.

Discussion

5545.	The solvent used in Barisol dewaxing process is
A.	hexane
B.	furfural
C.	benzol and ethylene dichloride
D.	methyl ethyl ketone (MEK)
Answer» D. methyl ethyl ketone (MEK)

Discussion

5546.	The main aim of cracking is to produce
A.	gasoline
B.	lube oil
C.	petrolatum
D.	coke
Answer» B. lube oil

Discussion

5547.	Octane number (unleaded) of gasoline produced by isomerisation of butane may be about
A.	45
B.	55
C.	70
D.	90
Answer» D. 90

Discussion

5548.	In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction
A.	heavy distillates
B.	intermediate distillates
C.	light ends
D.	residues
Answer» B. intermediate distillates

Discussion

5549.	Hydrocracking employs
A.	high pressure & temperature.
B.	low pressure & temperature.
C.	high pressure and low temperature.
D.	high temperature and low pressure.
Answer» B. low pressure & temperature.

Discussion

5550.	Sour crude means the __________ bearing crude.
A.	asphalt
B.	sulphur compounds
C.	wax
D.	nitrogen compounds
Answer» C. wax

Discussion

Explore topic-wise MCQs in Engineering.

Heat of neutralisation of HCl and NaOH is - 57.46 kJ/Kg mole. The heat of ionisation of water will be __________ kJ/Kg mole.

The heat evolved in the combustion of benzene is represented by the equation: C6H6 + 7.5 O2 = 6CO2 + 3H2O, H = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be __________ kJ/kgmole.

If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.

A sugar solution containing __________ percent sugar is equivalent to 1 Brix.

__________ equation gives the effect of temperature on heat of reaction.

Which of the following has the smallest least effect on the solubility of a solute into the solvent ?

1 Kcal/kg. C is equivalent to __________ BTU/lb. F.

The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the

How many phases are present at eutectic point ?

The increase in the temperature of the aqueous solution will result in decrease of its

Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.

In condenser, the cooling water is passed in the tube side in a pass arrangement, because

In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

Height of the flights in the rotary drier is in the range of

Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.

Maximum allowable vapour velocity in a bubble cap tower is determined by the

Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is

The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

Thickness of the frame of a plate and frame filter as compared to that of plates is

Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?

The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves &amp; corrugations.

Rivets are generally specified by the

Length to diameter ratio of most rotary driers is in the range of

Floating head heat exchangers are used for the

The most common standard size of bubble caps used in industrial operation is

Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.

In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

for fully open gate valves would be

LMTD correction factor is used in heat exchanger design for

Older crude petroleum

Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene &amp; toluene ?

Diesel index is defined as

Alkylation

Which of the following has the maximum API gravity of all?

Petroleum coke is used mainly .in the

Research octane number refers to the

In catalytic alkylation, higher iso-butane to olefin ratio gives

In case of liquid petrofuels, momentary combustion is observed at its

Polymerisation

The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol.

Which of the following is the most widely used cracking process in oil refineries ?

Catalyst used in the catalytic polymerisation is

Petroleum liquid fuels having flash point greater than 66 C is considered as safe during storage and handling. Which of the following has flash point &gt; 66 C ?

The solvent used in Barisol dewaxing process is

The main aim of cracking is to produce

Octane number (unleaded) of gasoline produced by isomerisation of butane may be about

In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction

Hydrocracking employs

Sour crude means the __________ bearing crude.

The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.

Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene ?

Petroleum liquid fuels having flash point greater than 66 C is considered as safe during storage and handling. Which of the following has flash point > 66 C ?