_ Annealing of a material does not$?

Permit its further cold working

_ Evaporative cooling process employs a combination of cooling and humidification in which the$?

Sensible heat is removed and the latent heat is added

Sensible heat is added and latent heat is removed

_ When the weight of a ball inside the ball mill is just balanced by the centrifugal force,$?

The ball abandans its parabolic path for a circular path

The ball abandons its circular path for a parabolic path

The ball abandans its parabolic path for a circular path

The ball continues to move on a circular path

The ball continues to move on a parabolic path

_ The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the$?

Hydrazine addition during feed water treatment

Release of non-condensable gas from water in the boiler

_ Rockwell number represents the$?

Active ingredients in a fertiliser

_ The substance used as a smoke screen in warfare is$?

P‚Äö√á√áO‚Äö√á√ñ

C‚Äö√á√áH‚Äö√á√á

P‚Äö√á√áO‚Äö√á√ñ

_ One of the methods of purification of leach liquor is ion exchange, which involves$?

Exchange between a solid phase and a gas phase

Exchange between two liquid phases

Exchange between a gaseous phase and a liquid phase

Exchange between a liquid phase and an organic resin phase

Exchange between a solid phase and a gas phase

_ The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is$?

More but less than the diameter of bolt

_ Pick out the wrong statement. Termination of polymerisation reaction occurs, if the$?

Impurities present in monomers interfere with the chemical reaction

Two ends of a chain of molecules join

__The unit of gc is__

lbf/lbm . ft/seC‚Äö√á√á

lbm/lbf . ft/seC‚Äö√á√á

lbf/lbm . ft/seC‚Äö√á√á

lbm/lbf . seC‚Äö√á√á/ft

lbf/lbm . seC‚Äö√á√á/ft

__The difference in the properties of a substance in three states of matter depends upon the__

Difference in intermolecular forces

__Pick out the correct statement about the condensation.__

If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it

Filmwise condensation gives a lower heat transfer rate than the dropwise condensation

Suitable coating or vapour additive is used to promote film wise condensation

If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it

Reynolds number of condensing liquid is based on its mass flow rate

__Pick out the wrong statement about powder metallurgy technique.__

Final product in powder metallurgy is not necessarily metallic powder

Powder metallurgy techniques are applied at room temperature

Final product in powder metallurgy is not necessarily metallic powder

The final product in powder metallurgy is made from metallic powder

Silver and nickel when melted together do not mix to form an alloy ; however alloy of these constituents can be made by powder metallurgy technique

__Multistage compression of air as compared to single stage compression offers the advantage of__

Power saving per unit weight of air delivered

Moisture elimination in the inter-stage cooler

Increased volumetric efficiency

__Shrinkage allowance on pattern is provided to compensate for shrinkage when the__

Liquid metal temperature drops from pouring temperature to room temperature

Metal changes from liquid state to solid state at freezing temperature

Solid phase temperature drops from freezing temperature to the room temperature

Liquid metal temperature drops from pouring temperature to room temperature

Liquid metal temperature drops from pouring temperature to freezing temperature

The one, which comes out of the blast furnace

__The starting of a car takes time in winter, because the__

Octane number of fuel is decreased

Fuel supply for ignition is not sufficient

Vaporisation of the fuel is decreased

__Viscoelastic behaviour is observed in __________ materials.__

Non-crystalline organic polymeric

1175 + Mcqs in Chemical Engineering Basics Page 14 McqOptions

651.	_ Annealing of a material does not$?
A.	Permit its further cold working
B.	Soften it
C.	Case harden it
D.	None of these
Answer» D. None of these

Discussion

652.	_ Evaporative cooling process employs a combination of cooling and humidification in which the$?
A.	Sensible heat is added
B.	Sensible heat is removed and the latent heat is added
C.	Latent heat is removed
D.	Sensible heat is added and latent heat is removed
Answer» C. Latent heat is removed

Discussion

653.	_ When the weight of a ball inside the ball mill is just balanced by the centrifugal force,$?
A.	The ball abandons its circular path for a parabolic path
B.	The ball abandans its parabolic path for a circular path
C.	The ball continues to move on a circular path
D.	The ball continues to move on a parabolic path
Answer» B. The ball abandans its parabolic path for a circular path

Discussion

654.	_ The concentration of (H‚Äö√Ö‚à´) ions is 4 x 10‚Äö√Ö¬™‚Äö√Ö¬µ in a solution. Then pH of the solution will be (Given log 4 = 0.6 )$?
A.	4.4
B.	5.6
C.	8.4
D.	2.4
Answer» B. 5.6

Discussion

655.	_ An ideal material for making cooking vessels should have$?
A.	High heat capacity
B.	Low heat capacity
C.	High thermal conductivity
D.	Both B and C
Answer» E.

Discussion

656.	_ __________ method of depreciation calculation ensures that the interest is charged on the cost of machine asset every year on the book value, but the rate of depreciation remains constant every year.$?
A.	Annuity charging
B.	Atraight line
C.	Ainking fund
D.	None of these
Answer» C. Ainking fund

Discussion

657.	_ Iron has got __________ isotopes.$?
A.	No
B.	Four
C.	Three
D.	Two
Answer» C. Three

Discussion

658.	_ __________ of test specimens is not involved in any hardness testing method.$?
A.	Fracture
B.	Indentation
C.	Wear
D.	Scratch
Answer» B. Indentation

Discussion

659.	_ The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the$?
A.	Water alkalinity & leakage
B.	Hydrazine addition during feed water treatment
C.	Release of non-condensable gas from water in the boiler
D.	Scale formation
Answer» D. Scale formation

Discussion

660.	_ Rockwell number represents the$?
A.	Hardness of a substance
B.	Colour of a pigment
C.	Density of a polymer
D.	Active ingredients in a fertiliser
Answer» B. Colour of a pigment

Discussion

661.	_ Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?$?
A.	Air filter
B.	Fuel injector
C.	Exhaust silencer
D.	Battery
Answer» C. Exhaust silencer

Discussion

662.	_ Biological shield in a nuclear reactor is generally provided to protect against the$?
A.	≈í¬±-rays
B.	≈í‚â§-rays
C.	Gamma rays & neutrons
D.	Electrons
Answer» D. Electrons

Discussion

663.	_ L.D. converters are generally lined with$?
A.	Magnesite
B.	Fireclay
C.	Chrome magnesite
D.	Silica
Answer» D. Silica

Discussion

664.	_ The substance used as a smoke screen in warfare is$?
A.	C‚Äö√á√áH‚Äö√á√á
B.	SiCl‚Äö√á√ë
C.	P‚Äö√á√áO‚Äö√á√ñ
D.	PCl5
Answer» C. P‚Äö√á√áO‚Äö√á√ñ

Discussion

665.	_ A common disinfectant used in village wells for disinfection of water is$?
A.	Free chlorine
B.	Bromine
C.	Iodine
D.	Potassium permanganate
Answer» E.

Discussion

666.	_ One of the methods of purification of leach liquor is ion exchange, which involves$?
A.	Exchange between two liquid phases
B.	Exchange between a gaseous phase and a liquid phase
C.	Exchange between a liquid phase and an organic resin phase
D.	Exchange between a solid phase and a gas phase
Answer» D. Exchange between a solid phase and a gas phase

Discussion

667.	_ Exposure to __________ accelarates the degradation of plastics.$?
A.	Ultraviolet radiation
B.	High atmospheric temperature
C.	High ambient temperature
D.	Damp atmosphere
Answer» B. High atmospheric temperature

Discussion

668.	_ The bulk modulus of a material with Poisson's ratio of 0.5 is equal to$?
A.	3 x Young's modulus
B.	Young's modulus
C.	Infinity
D.	Zero
Answer» D. Zero

Discussion

669.	_ The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is$?
A.	More
B.	Less
C.	Same
D.	More but less than the diameter of bolt
Answer» B. Less

Discussion

670.	_ Projection welding & stud welding is categorised as the __________ welding.$?
A.	Pressure
B.	Thermit
C.	Resistance
D.	Arc
Answer» D. Arc

Discussion

671.	_ Pick out the wrong statement. Termination of polymerisation reaction occurs, if the$?
A.	Catalyst supply is stopped
B.	Monomer supply is exhausted
C.	Impurities present in monomers interfere with the chemical reaction
D.	Two ends of a chain of molecules join
Answer» B. Monomer supply is exhausted

Discussion

672.	__The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.__
A.	Flow output
B.	Head developed
C.	Overall efficiency
D.	Weight
Answer» B. Head developed

Discussion

673.	__A __________ type pressure sensing element is commonly used in aneroid barometer.__
A.	Capsule
B.	Bellow
C.	Spiral tube
D.	Flat diaphragm
Answer» B. Bellow

Discussion

674.	__High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27¬¨‚àûC with relative humidity ranging from __________ percent.__
A.	5 to 10
B.	15 to 25
C.	45 to 50
D.	75 to 80
Answer» D. 75 to 80

Discussion

675.	__One ton of refrigeration is not equivalent to the heat removal rate of__
A.	200 BTU/minute
B.	50 kcal/minute
C.	50 kJ/sec
D.	3.5 KW
Answer» D. 3.5 KW

Discussion

676.	__Nitrogen compounds are not used in the manufacture of__
A.	Fertilisers
B.	Gun powder
C.	Tip of match sticks
D.	Explosive
Answer» D. Explosive

Discussion

677.	__The unit of gc is__
A.	lbm/lbf . ft/seC‚Äö√á√á
B.	lbf/lbm . ft/seC‚Äö√á√á
C.	lbm/lbf . seC‚Äö√á√á/ft
D.	lbf/lbm . seC‚Äö√á√á/ft
Answer» B. lbf/lbm . ft/seC‚Äö√á√á

Discussion

678.	__Out of the following, __________ pipe is the least corrosion resistant.__
A.	Mild steel
B.	Copper
C.	Wrought iron
D.	Stainless steel
Answer» D. Stainless steel

Discussion

679.	__Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.__
A.	Volume
B.	Pressure
C.	Heat
D.	None of these
Answer» B. Pressure

Discussion

680.	__The difference in the properties of a substance in three states of matter depends upon the__
A.	Binding energy of atoms
B.	Difference in molecular shape
C.	Difference in intermolecular forces
D.	None of these
Answer» D. None of these

Discussion

681.	__Pick out the correct statement about the condensation.__
A.	Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
B.	Suitable coating or vapour additive is used to promote film wise condensation
C.	If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it
D.	Reynolds number of condensing liquid is based on its mass flow rate
Answer» C. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it

Discussion

682.	____________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.__
A.	Tensile
B.	Fatigue
C.	Impact
D.	None of these
Answer» B. Fatigue

Discussion

683.	__Temper brittleness of a material can be fairly detected by the __________ test.__
A.	Fatigue
B.	Notched bar impact
C.	Tensile
D.	Hardness
Answer» C. Tensile

Discussion

684.	__Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)__
A.	V/A
B.	V/A¬¨‚â§
C.	V¬¨‚â§/A
D.	V¬¨‚â§/A¬¨‚â§
Answer» E.

Discussion

685.	__Which one can be directly solidified from gaseous state wihtout entering into liquid state?__
A.	Helium
B.	Oxygen
C.	Carbon dioxide
D.	None of these
Answer» D. None of these

Discussion

686.	__Pick out the wrong statement about powder metallurgy technique.__
A.	Powder metallurgy techniques are applied at room temperature
B.	Final product in powder metallurgy is not necessarily metallic powder
C.	The final product in powder metallurgy is made from metallic powder
D.	Silver and nickel when melted together do not mix to form an alloy ; however alloy of these constituents can be made by powder metallurgy technique
Answer» B. Final product in powder metallurgy is not necessarily metallic powder

Discussion

687.	__Brittleness induced due to the presence of sulphur in steel can be reduced by adding__
A.	Manganese
B.	Magnesium
C.	Vanadium
D.	Copper
Answer» B. Magnesium

Discussion

688.	__The elastic strain in copper is due to the__
A.	Motion of dislocations
B.	Stretching of atomic bonds
C.	Breakage of atomic bonds
D.	None of the above
Answer» B. Stretching of atomic bonds

Discussion

689.	__Multistage compression of air as compared to single stage compression offers the advantage of__
A.	Power saving per unit weight of air delivered
B.	Moisture elimination in the inter-stage cooler
C.	Increased volumetric efficiency
D.	All of the above
Answer» E.

Discussion

690.	__Steam condenser tubes are made of ad-mirability brass, in which percentage of zinc & copper are __________ respectively.__
A.	70 & 30
B.	30 & 70
C.	50 & 50
D.	90 & 10
Answer» B. 30 & 70

Discussion

691.	__The co-ordination number in simple cubic structure is__
A.	4
B.	6
C.	8
D.	12
Answer» C. 8

Discussion

692.	__The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 x 10‚Äö√Ö¬™¬¨œÄ6‚Äö√Ö‚àÇ m¬¨‚â§ . S‚Äö√Ö¬™¬¨œÄ and it is 1.94 x 10‚Äö√Ö¬™¬¨œÄ‚Äö√Ö¬• m¬¨‚â§ S‚Äö√Ö¬™¬¨œÄ at 1200 K. The activation energy (in k. J.mole‚Äö√Ö¬™¬¨œÄ ) for the diffusion of Ni in Cu is__
A.	130
B.	180
C.	230
D.	250
Answer» D. 250

Discussion

693.	__Shrinkage allowance on pattern is provided to compensate for shrinkage when the__
A.	Metal changes from liquid state to solid state at freezing temperature
B.	Solid phase temperature drops from freezing temperature to the room temperature
C.	Liquid metal temperature drops from pouring temperature to room temperature
D.	Liquid metal temperature drops from pouring temperature to freezing temperature
Answer» C. Liquid metal temperature drops from pouring temperature to room temperature

Discussion

694.	__Pig iron is__
A.	Made from cast iron
B.	Made from wrought iron
C.	The one, which comes out of the blast furnace
D.	Free from impurities
Answer» D. Free from impurities

Discussion

695.	__An orthotropic material is a special class of anisotropic material, which is described by their properties in three perpendicular directions. An example of orthotropic material is__
A.	Stainless steel
B.	Cast iron
C.	Wood
D.	Teflon
Answer» D. Teflon

Discussion

696.	__Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?__
A.	Copper
B.	Mercury
C.	Lead
D.	None of these
Answer» C. Lead

Discussion

697.	__In __________ process, ions of salts react with water to produce acidity or alkalinity.__
A.	Hydration
B.	Hydrolysis
C.	Electrolysis
D.	Dialysis
Answer» C. Electrolysis

Discussion

698.	__The underground well of a biogas plant is called the__
A.	Septic tank
B.	Oxidation well
C.	Digestor
D.	Lagoon
Answer» D. Lagoon

Discussion

699.	__The starting of a car takes time in winter, because the__
A.	Octane number of fuel is decreased
B.	Fuel supply for ignition is not sufficient
C.	Vaporisation of the fuel is decreased
D.	Pour point of fuel decreases
Answer» D. Pour point of fuel decreases

Discussion

700.	__Viscoelastic behaviour is observed in __________ materials.__
A.	Non-crystalline organic polymeric
B.	Ceramic
C.	All crystalline
D.	All of the above
Answer» B. Ceramic

Discussion

Explore topic-wise MCQs in Chemical Engineering.

_ Annealing of a material does not$?

_ Evaporative cooling process employs a combination of cooling and humidification in which the$?

_ When the weight of a ball inside the ball mill is just balanced by the centrifugal force,$?

_ The concentration of (H‚Äö√Ö‚à´) ions is 4 x 10‚Äö√Ö¬™‚Äö√Ö¬µ in a solution. Then pH of the solution will be (Given log 4 = 0.6 )$?

_ An ideal material for making cooking vessels should have$?

_ __________ method of depreciation calculation ensures that the interest is charged on the cost of machine asset every year on the book value, but the rate of depreciation remains constant every year.$?

_ Iron has got __________ isotopes.$?

_ __________ of test specimens is not involved in any hardness testing method.$?

_ The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the$?

_ Rockwell number represents the$?

_ Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?$?

_ Biological shield in a nuclear reactor is generally provided to protect against the$?

_ L.D. converters are generally lined with$?

_ The substance used as a smoke screen in warfare is$?

_ A common disinfectant used in village wells for disinfection of water is$?

_ One of the methods of purification of leach liquor is ion exchange, which involves$?

_ Exposure to __________ accelarates the degradation of plastics.$?

_ The bulk modulus of a material with Poisson's ratio of 0.5 is equal to$?

_ The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is$?

_ Projection welding & stud welding is categorised as the __________ welding.$?

_ Pick out the wrong statement. Termination of polymerisation reaction occurs, if the$?

__The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.__

__A __________ type pressure sensing element is commonly used in aneroid barometer.__

__High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27¬¨‚àûC with relative humidity ranging from __________ percent.__

__One ton of refrigeration is not equivalent to the heat removal rate of__

__Nitrogen compounds are not used in the manufacture of__

__The unit of gc is__

__Out of the following, __________ pipe is the least corrosion resistant.__

__Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.__

__The difference in the properties of a substance in three states of matter depends upon the__

__Pick out the correct statement about the condensation.__

____________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.__

__Temper brittleness of a material can be fairly detected by the __________ test.__

__Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)__

__Which one can be directly solidified from gaseous state wihtout entering into liquid state?__

__Pick out the wrong statement about powder metallurgy technique.__

__Brittleness induced due to the presence of sulphur in steel can be reduced by adding__

__The elastic strain in copper is due to the__

__Multistage compression of air as compared to single stage compression offers the advantage of__

__Steam condenser tubes are made of ad-mirability brass, in which percentage of zinc & copper are __________ respectively.__

__The co-ordination number in simple cubic structure is__

__Shrinkage allowance on pattern is provided to compensate for shrinkage when the__

__Pig iron is__

__An orthotropic material is a special class of anisotropic material, which is described by their properties in three perpendicular directions. An example of orthotropic material is__

__Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?__

__In __________ process, ions of salts react with water to produce acidity or alkalinity.__

__The underground well of a biogas plant is called the__

__The starting of a car takes time in winter, because the__

__Viscoelastic behaviour is observed in __________ materials.__

The ______ of a double acting reciprocating pump as compared to the single acting pump will be almost double.

A ______ type pressure sensing element is commonly used in aneroid barometer.

High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27¬¨‚àûC with relative humidity ranging from ______ percent.

One ton of refrigeration is not equivalent to the heat removal rate of

Nitrogen compounds are not used in the manufacture of

The unit of gc is

Out of the following, ______ pipe is the least corrosion resistant.

Otto cycle used in spark ignition petrol engines is also known as the constant ______ cycle.

The difference in the properties of a substance in three states of matter depends upon the

Pick out the correct statement about the condensation.

__________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.

Temper brittleness of a material can be fairly detected by the ______ test.

Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)

Which one can be directly solidified from gaseous state wihtout entering into liquid state?

Pick out the wrong statement about powder metallurgy technique.

Brittleness induced due to the presence of sulphur in steel can be reduced by adding

The elastic strain in copper is due to the

Multistage compression of air as compared to single stage compression offers the advantage of

Steam condenser tubes are made of ad-mirability brass, in which percentage of zinc & copper are ______ respectively.

The co-ordination number in simple cubic structure is

Shrinkage allowance on pattern is provided to compensate for shrinkage when the

Pig iron is

An orthotropic material is a special class of anisotropic material, which is described by their properties in three perpendicular directions. An example of orthotropic material is

Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?

In ______ process, ions of salts react with water to produce acidity or alkalinity.

The underground well of a biogas plant is called the

The starting of a car takes time in winter, because the

Viscoelastic behaviour is observed in ______ materials.