__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

Question

__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

A. Beryllium

B. Zirconia

C. Alumina

D. Magnesia

Share this question with your friends

Show all Chemical Engineering Basics MCQ

Comment

Tesla metre per ampere (T. m/A) is the unit for the measurement of

A. Magnetic susceptibility

B. Magnetic moment

C. Permeability of free space

D. Flux density

Discuss this answer

Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be

A. More

B. Less

C. Same

D. Either more or less; depends on the climatic conditions

Discuss this answer

Propulsion of rocket follows from the

A. Newton's second law of motion

B. Newton's third law of motion

C. Law of projectiles

D. Archimedes principle

Discuss this answer

The most serious manufacturing defect from fracture toughness point of view is

A. Surface roughness

B. Pores

C. Spherical inclusion

D. Crack

Discuss this answer

Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

A. Strain rate is increased

B. Grain size is increased

C. Prior cold deformation is increased

D. Not affected by any of the above parameters

Discuss this answer

A material being tested for endurance strength is subjected to the __________ load.

A. Impact

B. Completely reversed

C. Dynamic

D. Static & dynamic

Discuss this answer

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

A. Gr^0.25, Gr

B. Gr^0.25, Gr^0.33

C. Gr, Gr^0.25

D. Gr^0.33, Gr^0.25

Discuss this answer

The specific gravity of coal depends mainly on its __________ content.

A. Carbon

B. Volatile matter

C. Ash

D. Moisture

Discuss this answer

In an eutectic system, two elements are completely

A. Soluble in solid state

B. Insoluble in liquid state

C. Insoluble in both solid & liquid state

D. Soluble in liquid state

Discuss this answer

Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

A. 2

B. 3

C. 0.8

D. 6

Discuss this answer

Faraday's law of electrolysis is related to the

A. Cation speed

B. Atomic number of the cation

C. Equivalent mass of the electrolyte

D. None of these

Discuss this answer

The most important consideration in value engineering is the

A. Profit maximisation

B. Customer satisfaction

C. Cost reduction

D. Process improvement

Discuss this answer

'Flare tower' used in industry is meant for

A. Venting off (after burning) the excess inflammable/toxic gases at high pressure

B. Absorbing the pollutant gases from the furnace exhaust

C. Cooling of furnace exhaust gases

D. None of these

Discuss this answer

Ferromagnetic materials owe their properties to __________ inner sub-shells.

A. Completely filled

B. Partially filled

C. Equally filled

D. Vacant

Discuss this answer

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

A. Occurs higher in the electro-chemical series of metals

B. Is exemplified by magnesium plate

C. Is much cheaper than the cathodic base material to be guarded against corrosion

D. All (A), (B) & (C)

Discuss this answer

The main charge in blast furnace is usually

A. Iron ore & coke

B. Iron ore, coke & air

C. Limestone, coke & iron ore

D. Limestone, sand & iron ore

Discuss this answer

With increase in temperature, the electrical conductivity of semiconductors

A. Increases

B. Decreases

C. Remain constant

D. Either (A) or (B), depends on the type of semi-conductor

Discuss this answer

Which of the following is an unconventional source of energy?

A. Thermal power

B. Hydroelectric power

C. Nuclear-fusion power

D. Solar power

Discuss this answer

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

A. 768

B. 908

C. 1400

D. 1539

Discuss this answer

Water hammer is caused in steam carrying pipelines, because of

A. Partial condensation of steam

B. Vibration of the pipeline

C. High degree of superheat of steam

D. Its exposure to torrential rain

Discuss this answer

Basicity of the slag in Indian blast furnace is in the range of

A. 0.7-1.0

B. 1.1-1.4

C. 1.5 - 1.8

D. 2.0 - 2.5

Discuss this answer

The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

A. 140

B. 180

C. 240

D. 280

Discuss this answer

Viscoelastic behaviour is observed in __________ materials.

A. Non-crystalline organic polymeric

B. Ceramic

C. All crystalline

D. All amorphous

Discuss this answer

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

A. Wrought

B. Tool

C. Alloy

D. Plain carbon

Discuss this answer

High speed steel tools retain their hardness upto a temperature of __________ °C.

A. 500

B. 750

C. 900

D. 1100

Discuss this answer

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.

A. 15

B. 25

C. 10

D. 30

Discuss this answer

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

A. A

B. D

C. 1/A

D. 1/A²

Discuss this answer

'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

A. Petrol

B. LPG

C. Light hydrocarbon gases (e.g. butane or propane)

D. None of these

Discuss this answer

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that

A. Pure oxygen has been used for combustion

B. Nitrogen percentage in the fuel is very high

C. Excess air has been used for combustion

D. Hydrogen is not present in the fuel

Discuss this answer

Ammonia gas can be dried by

A. PCl₅

B. Quick lime

C. CaCl₂

D. Concentrated H₂SO₄

Discuss this answer

Accepted Answer

C. Alumina

__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Tesla metre per ampere (T. m/A) is the unit for the measurement of

Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be

Propulsion of rocket follows from the

The most serious manufacturing defect from fracture toughness point of view is

Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

A material being tested for endurance strength is subjected to the __________ load.

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

The specific gravity of coal depends mainly on its __________ content.

In an eutectic system, two elements are completely

Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

Faraday's law of electrolysis is related to the

The most important consideration in value engineering is the

'Flare tower' used in industry is meant for

Ferromagnetic materials owe their properties to __________ inner sub-shells.

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

The main charge in blast furnace is usually

With increase in temperature, the electrical conductivity of semiconductors

Which of the following is an unconventional source of energy?

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

Water hammer is caused in steam carrying pipelines, because of

Basicity of the slag in Indian blast furnace is in the range of

The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

Viscoelastic behaviour is observed in __________ materials.

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

High speed steel tools retain their hardness upto a temperature of __________ °C.

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that

Ammonia gas can be dried by

Also checkout

__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Tesla metre per ampere (T. m/A) is the unit for the measurement of

Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be

Propulsion of rocket follows from the

The most serious manufacturing defect from fracture toughness point of view is

Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

A material being tested for endurance strength is subjected to the __________ load.

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

The specific gravity of coal depends mainly on its __________ content.

In an eutectic system, two elements are completely

Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

Faraday's law of electrolysis is related to the

The most important consideration in value engineering is the

'Flare tower' used in industry is meant for

Ferromagnetic materials owe their properties to __________ inner sub-shells.

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

The main charge in blast furnace is usually

With increase in temperature, the electrical conductivity of semiconductors

Which of the following is an unconventional source of energy?

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

Water hammer is caused in steam carrying pipelines, because of

Basicity of the slag in Indian blast furnace is in the range of

The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

Viscoelastic behaviour is observed in __________ materials.

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

High speed steel tools retain their hardness upto a temperature of __________ °C.

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is __________ mm.

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that

Ammonia gas can be dried by

Also checkout

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that