For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

Question

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

A. Linearly

B. Exponentially

C. Logarithmically

D. Inversely

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Dislocations are __________ defects.

A. Point

B. Line

C. Volume

D. None of these

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The refrigerant freon-12 is chemically

A. CCl₂F₂

B. CCl₃F

C. CClF₃

D. CCl₄F

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The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

A. 60 - 100

B. 400 - 700

C. 1200 -1500

D. 2000 - 2300

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

A. Impact

B. Completely reversed

C. Dynamic

D. Static & dynamic

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Wood is a/an __________ material.

A. Amorphous

B. Cellular

C. Homogeneous

D. Granular

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Quartz is a __________ material.

A. Diamagnetic

B. Ferromagnetic

C. Ferroelectric

D. Piezoelectric

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Cemented carbide tools are not suitable for cutting

A. Aluminium

B. Brass

C. Cast iron

D. Steel

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What happens, when SO₂ is passed through a solution of H2S in water?

A. Precipitation of sulphur takes place

B. H₂SO₃ is formed

C. Oleum is formed

D. None of these

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Materials having __________ lattice structure are usually the most ductile.

A. Body centred cubic (bcc)

B. Hexagonal close packed (hcp)

C. Face centred cubic (fcc)

D. None of these

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Cementite is in the lamellar form in the __________ phase of steel.

A. Martenistic

B. Bainitic

C. Pearlitic

D. Ferritic

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Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

A. 1.5

B. 3

C. 5

D. 7

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The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.

A. 0.2

B. 0.4

C. 0.6

D. 0.8

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Most important property of steels for use in automobile bodies is the

A. Formability

B. Yield strength

C. Toughness

D. Resilience

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

A. 0.5

B. 3

C. 10

D. 25

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Between 230 and 370°C, blue brittleness is caused in mild steel because of the

A. Immobility of dislocation

B. Strain-ageing

C. Increase in Young's modulus

D. Strain hardening

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Maraging steels derive their strength from the following mechanism:

A. A fine, highly dislocated and strong martensite

B. Fine dispersions of inter-metallic of Fe, Ni, Ti etc

C. Fine dispersions of alloy carbides in a ferrite matrix

D. Fine dispersions of C nucleated on dislocations in austenite

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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

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The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

A. Red

B. Extended

C. Super

D. Extreme

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The noble metals

A. Are exemplified by Na, K and Li

B. Do not resist corrosion very strongly

C. Are the lowermost in the electro-chemical series of metals

D. None of these

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A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

A. Steel

B. Glass

C. Rubber

D. Brass

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An example of unsteady non uniform flow is the flow of liquid under pressure through a

A. Tapering pipe at constant flow rate

B. Tapering pipe at either decreasing or increasing flow rate

C. Long pipeline of constant diameter

D. None of these

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Boiler draught of 10 mm water column is equivalent to

A. 1 kgf/m²

B. 10 kgf/m²

C. 10 kgf/mm²

D. 1 kgf/mm²

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Cascade control is

A. The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller

B. Used when changes in process conditions cause serious upsets in the controlled variable

C. Useful to control flow from temperature

D. All 'a', 'b' & 'c'

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One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m^{- 1}. k^-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is

A. 100

B. 900

C. 9000

D. 10000

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Minimum number of members required to form a Public Limited Joint Stock Com-pany is

A. 7

B. 10

C. 12

D. 17

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Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

A. Forging

B. Cold rolling

C. Hot rolling

D. Casting

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The hardenability of steel decreases with

A. Decrease in dislocation density

B. Increase in solutionising temperature

C. Increase in strength

D. Decrease in grain size

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An abrupt and sudden fall in the reading of barometer is an indication of the

A. Storm

B. Rain

C. Clear weather

D. Cold wave

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Adhesives

A. Cant be used in the form of pressure sensitive tapes

B. Cant join two dissimilar metals

C. Cure instantaneously after application on a surface

D. None of these

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The product (s) of roasting of a sulphide ore is (are)

A. Oxide only

B. Sulphate only

C. Oxide and sulphate

D. Dependent on temperature and partial pressure of oxygen & sulphur dioxide

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Accepted Answer

A. Linearly

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Dislocations are __________ defects.

The refrigerant freon-12 is chemically

The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

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

Wood is a/an __________ material.

Quartz is a __________ material.

Cemented carbide tools are not suitable for cutting

What happens, when SO₂ is passed through a solution of H2S in water?

Materials having __________ lattice structure are usually the most ductile.

Cementite is in the lamellar form in the __________ phase of steel.

Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.

Most important property of steels for use in automobile bodies is the

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

Between 230 and 370°C, blue brittleness is caused in mild steel because of the

Maraging steels derive their strength from the following mechanism:

Addition of silicon to cast iron

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

The noble metals

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

An example of unsteady non uniform flow is the flow of liquid under pressure through a

Boiler draught of 10 mm water column is equivalent to

Cascade control is

One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m^{- 1}. k^-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is

Minimum number of members required to form a Public Limited Joint Stock Com-pany is

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

The hardenability of steel decreases with

An abrupt and sudden fall in the reading of barometer is an indication of the

Adhesives

The product (s) of roasting of a sulphide ore is (are)

Also checkout

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Dislocations are __________ defects.

The refrigerant freon-12 is chemically

The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

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

Wood is a/an __________ material.

Quartz is a __________ material.

Cemented carbide tools are not suitable for cutting

What happens, when SO2 is passed through a solution of H2S in water?

Materials having __________ lattice structure are usually the most ductile.

Cementite is in the lamellar form in the __________ phase of steel.

Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.

Most important property of steels for use in automobile bodies is the

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

Between 230 and 370°C, blue brittleness is caused in mild steel because of the

Maraging steels derive their strength from the following mechanism:

Addition of silicon to cast iron

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

The noble metals

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

An example of unsteady non uniform flow is the flow of liquid under pressure through a

Boiler draught of 10 mm water column is equivalent to

Cascade control is

One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m- 1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is

Minimum number of members required to form a Public Limited Joint Stock Com-pany is

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

The hardenability of steel decreases with

An abrupt and sudden fall in the reading of barometer is an indication of the

Adhesives

The product (s) of roasting of a sulphide ore is (are)

Also checkout

What happens, when SO₂ is passed through a solution of H2S in water?

One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m^{- 1}. k^-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is