8247 + Mcqs in Chemical Engineering Page 129 McqOptions

6401.	The velocity of sound in air is independent of changes in its
A.	humidity
B.	pressure
C.	temperature
D.	none of these
Answer» C. temperature

Discussion

6402.	Stainless steel is welded with difficulty because of
A.	its high melting temperature.
B.	chances of cracking.
C.	oxide film formation.
D.	chromium carbide formation.
Answer» D. chromium carbide formation.

Discussion

6403.	For preparation of porous bearings by powder metallurgy, preferred particle shape is
A.	spherical
B.	nodular
C.	irregular
D.	no preferred shape
Answer» B. nodular

Discussion

6404.	The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
A.	0.5
B.	3
C.	10
D.	25
Answer» C. 10

Discussion

6405.	Machine tool bodies are usually made of
A.	cast iron
B.	mild steel
C.	wrought iron
D.	copper alloys
Answer» B. mild steel

Discussion

6406.	On increasing the yield strength of a steel from 450 to 650 MPa, its __________ will increase.
A.	ultimate tensile strength (UTS)
B.	modulus of toughness
C.	percent elongation
D.	modulus of resilience
Answer» C. percent elongation

Discussion

6407.	The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400 C is
A.	magnesite
B.	chrome
C.	silica
D.	fireclay
Answer» D. fireclay

Discussion

6408.	The path and movements followed by men, materials & equipments in executing the activities is indicated by the
A.	travel charts
B.	man-machine charts
C.	string diagram
D.	flow diagram
Answer» E.

Discussion

6409.	Holes in a plate for rivetted joints is preferably made by
A.	drilling
B.	tapping
C.	reaming
D.	punching
Answer» B. tapping

Discussion

6410.	The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.
A.	isotactic
B.	saturation
C.	inversion
D.	throttling
Answer» D. throttling

Discussion

6411.	Source of heat supply in a cupola is
A.	coke
B.	charcoal
C.	lumpy coal
D.	pulverised coal
Answer» B. charcoal

Discussion

6412.	The speed of sound will be maximum in
A.	vacuum
B.	metal
C.	air
D.	water
Answer» C. air

Discussion

6413.	Work done by a/an __________ process is determined by.
A.	adiabatic
B.	quasi-static
C.	isothermal
D.	isentropic
Answer» C. isothermal

Discussion

6414.	In case of water (Prandtl number 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is
A.	less
B.	more
C.	equal
D.	unpredictable
Answer» B. more

Discussion

6415.	Wrought iron does not have the
A.	uniform strength in all directions.
B.	ability to hold protective coating.
C.	high ductility & corrosion resistance.
D.	easily weldable characteristics.
Answer» B. ability to hold protective coating.

Discussion

6416.	The term 'Value' in value engineering technique refers to the __________ cost of the product.
A.	function (utility)
B.	selling
C.	production
D.	total
Answer» B. selling

Discussion

6417.	Melting point & boiling points of liquid oxygen are respectively - 218.8 C & - 183 C, while the same for liquid nitrogen is - 210 C & - 195.8 C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8
A.	C
B.	F
C.	K
D.	R
Answer» C. K

Discussion

6418.	The entropy change for a spontaneous process is
A.	> 0 for the system.
B.	< 0 for the system.
C.	> 0 for the system & the surrounding.
D.	< 0 for the system & the surrounding.
Answer» E.

Discussion

6419.	Milligram of KOH required to saponify 1 gm of oil is called its __________ number.
A.	saponification
B.	acid
C.	precipitation
D.	emulsion
Answer» B. acid

Discussion

6420.	Pick out the wrong statement about a fast breeder reactor.
A.	uses molten sodium as moderator.
B.	converts fertile fuel into fissile fuel.
C.	requires highly enriched fuel.
D.	produces more fuel than it consumes.
Answer» B. converts fertile fuel into fissile fuel.

Discussion

6421.	Stoneware pipes used for sewers for carrying sewage normally is joined by __________ joint.
A.	spigot and socket
B.	flanged iron
C.	collar
D.	expansion
Answer» B. flanged iron

Discussion

6422.	Which of the following parameters is actually measured during tensile testing of a specimen using Universal testing machine?
A.	Load & elongation.
B.	Engineering stress & strain.
C.	True stress & strain.
D.	Poisson's ratio & Young's modulus.
Answer» B. Engineering stress & strain.

Discussion

6423.	Hoope's cell is predominantly used for the electrolytic refining of
A.	zinc
B.	copper
C.	aluminium
D.	tin
Answer» D. tin

Discussion

6424.	Lead percentage in pure galena is about
A.	8.6
B.	86.6
C.	35.8
D.	61.4
Answer» B. 86.6

Discussion

6425.	__________ 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

6426.	Main alloying element in Elinvar used in precision instruments, hair springs for watches etc. is
A.	chromium
B.	nickel
C.	zinc
D.	aluminium
Answer» C. zinc

Discussion

6427.	An atom bomb works on the principle of
A.	nuclear fission
B.	nuclear fusion
C.	both the nuclear fission & fusion
D.	ionisation
Answer» B. nuclear fusion

Discussion

6428.	Eutectic reaction for iron-carbon system occurs at a temperature of __________ C.
A.	723
B.	959
C.	1147
D.	1493
Answer» B. 959

Discussion

6429.	Which of the following is an example of stress corrosion ?
A.	Season cracking of brass.
B.	Caustic embrittlement of steel.
C.	Both (a) & (b).
D.	Neither (a) nor (b).
Answer» D. Neither (a) nor (b).

Discussion

6430.	FeO (s) + CO (g) = Fe (s) + CO2 (g), k = 0. 435 at 1173E; At equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K?
A.	1.0
B.	1.3
C.	2.3
D.	3.3
Answer» E.

Discussion

6431.	The dew point of moist air becomes __________ with decrease in its relative humidity.
A.	less than the wet bulb temperature
B.	more than the wet bulb temperature
C.	more than the dry bulb temperature
D.	equal to wet bulb temperature
Answer» B. more than the wet bulb temperature

Discussion

6432.	Heating of ferromagnetic materials to a temperature above Curie temperature makes it
A.	insulator for heat & electricity transmission.
B.	ferritic.
C.	behave like paramagnetic materials.
D.	superconductor.
Answer» D. superconductor.

Discussion

6433.	Colour comparator is used to measure the
A.	pH value
B.	electrode potential
C.	colour intensity
D.	none of these
Answer» B. electrode potential

Discussion

6434.	__________ remains constant during the adiabatic cooling of moist air.
A.	Wet bulb temperature
B.	Dry bulb temperature
C.	Relative humidity
D.	Specific humidity
Answer» B. Dry bulb temperature

Discussion

6435.	__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
A.	Collar
B.	Flanged
C.	Bell and Spigot
D.	Expansion
Answer» C. Bell and Spigot

Discussion

6436.	Out of the following, the alloy which has equal percentage of constituents, is
A.	white metal
B.	gun metal
C.	duralumin
D.	constanton
Answer» E.

Discussion

6437.	Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition ?
A.	<img src="/_files/images/chemical-engineering/chemical-engineering-basics/760-839-1.png">
B.	<img src="/_files/images/chemical-engineering/chemical-engineering-basics/760-839-2.png">
C.	<img src="/_files/images/chemical-engineering/chemical-engineering-basics/760-839-3.png">
D.	<img src="/_files/images/chemical-engineering/chemical-engineering-basics/760-839-4.png">
Answer» D. <img src="/_files/images/chemical-engineering/chemical-engineering-basics/760-839-4.png">

Discussion

6438.	Steel is welded using the __________ flame.
A.	carburising
B.	neutral
C.	oxidising
D.	all (a), (b) & (c)
Answer» C. oxidising

Discussion

6439.	Addition of silicon to cast iron
A.	promotes graphite module formation.
B.	improves its ductility.
C.	does not promote graphite flakes formation.
D.	increases the fluidity of molten metal.
Answer» E.

Discussion

6440.	Lead is poured into the joint between two __________ pipes.
A.	mild steel
B.	concrete
C.	cast iron
D.	asbestos cement
Answer» D. asbestos cement

Discussion

6441.	About __________ ton of coke is required in a cupola to produce one ton of casting.
A.	0.03
B.	0.3
C.	0.8
D.	1.5
Answer» C. 0.8

Discussion

6442.	There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
A.	one
B.	two
C.	three
D.	none of these
Answer» C. three

Discussion

6443.	Which of the following is prone to cup and cone fracture ?
A.	Cast iron
B.	Soft brass
C.	Round specimen of ductile metal.
D.	Flat tensile specimen of ductile metal.
Answer» D. Flat tensile specimen of ductile metal.

Discussion

6444.	Which of the following materials has the least scrap value ?
A.	Aluminium
B.	Stainless steel
C.	Brass
D.	Copper
Answer» C. Brass

Discussion

6445.	Force between the molecules of the same substance is called __________ force.
A.	adhesive
B.	cohesive
C.	molecular
D.	Vander Walls
Answer» C. molecular

Discussion

6446.	Which of the following is not a ferromagnetic material ?
A.	Nickel
B.	Cobalt
C.	Aluminium
D.	Iron
Answer» D. Iron

Discussion

6447.	Rain drops falling through atmospheric air attain limited terminal velocity, because of
A.	upward thrust due to air.
B.	viscous force exerted by air.
C.	surface tension effects of water.
D.	force of gravity.
Answer» C. surface tension effects of water.

Discussion

6448.	Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
A.	burning
B.	intensive oxidation
C.	evaporation
D.	none of these
Answer» C. evaporation

Discussion

6449.	The material used for coating the welding electrode is termed as the
A.	flux
B.	slag
C.	protective layer
D.	binder
Answer» C. protective layer

Discussion

6450.	In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material ?
A.	Tin
B.	Lead
C.	Zinc
D.	Glass
Answer» E.

Discussion

Explore topic-wise MCQs in Engineering.

The velocity of sound in air is independent of changes in its

Stainless steel is welded with difficulty because of

For preparation of porous bearings by powder metallurgy, preferred particle shape is

The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

Machine tool bodies are usually made of

On increasing the yield strength of a steel from 450 to 650 MPa, its __________ will increase.

The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400 C is

The path and movements followed by men, materials &amp; equipments in executing the activities is indicated by the

Holes in a plate for rivetted joints is preferably made by

The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.

Source of heat supply in a cupola is

The speed of sound will be maximum in

Work done by a/an __________ process is determined by.

In case of water (Prandtl number 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

Wrought iron does not have the

The term 'Value' in value engineering technique refers to the __________ cost of the product.

Melting point &amp; boiling points of liquid oxygen are respectively - 218.8 C &amp; - 183 C, while the same for liquid nitrogen is - 210 C &amp; - 195.8 C respectively. The difference in melting points of liquid oxygen &amp; liquid nitrogen is not equal to 8.8

The entropy change for a spontaneous process is

Milligram of KOH required to saponify 1 gm of oil is called its __________ number.

Pick out the wrong statement about a fast breeder reactor.

Stoneware pipes used for sewers for carrying sewage normally is joined by __________ joint.

Which of the following parameters is actually measured during tensile testing of a specimen using Universal testing machine?

Hoope's cell is predominantly used for the electrolytic refining of

Lead percentage in pure galena is about

__________ 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.

Main alloying element in Elinvar used in precision instruments, hair springs for watches etc. is

An atom bomb works on the principle of

Eutectic reaction for iron-carbon system occurs at a temperature of __________ C.

Which of the following is an example of stress corrosion ?

FeO (s) + CO (g) = Fe (s) + CO2 (g), k = 0. 435 at 1173E; At equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K?

The dew point of moist air becomes __________ with decrease in its relative humidity.

Heating of ferromagnetic materials to a temperature above Curie temperature makes it

Colour comparator is used to measure the

__________ remains constant during the adiabatic cooling of moist air.

__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle &amp; reassemble the pipeline very frequently.

Out of the following, the alloy which has equal percentage of constituents, is

Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition ?

Steel is welded using the __________ flame.

Addition of silicon to cast iron

Lead is poured into the joint between two __________ pipes.

About __________ ton of coke is required in a cupola to produce one ton of casting.

There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

Which of the following is prone to cup and cone fracture ?

Which of the following materials has the least scrap value ?

Force between the molecules of the same substance is called __________ force.

Which of the following is not a ferromagnetic material ?

Rain drops falling through atmospheric air attain limited terminal velocity, because of

Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.

The material used for coating the welding electrode is termed as the

In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material ?

The path and movements followed by men, materials & equipments in executing the activities is indicated by the

Melting point & boiling points of liquid oxygen are respectively - 218.8 C & - 183 C, while the same for liquid nitrogen is - 210 C & - 195.8 C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8

__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.