The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

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The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

A. Decreasing the surface area of the electrodes

B. Increasing the concentration of zinc sulphate solution

C. Increasing the surface area of the electrodes

D. Increasing the concentration of copper sulphate solution

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Which of the following is the most wear resistant grade of carbide used for the cutting tools?

A. Aluminium carbide

B. Tungsten carbide

C. Nickel carbide

D. Iron carbide

Discuss this answer

With decrease in the grain size of a material, its creep resistance

A. Increases

B. Decreases

C. Remain constant

D. Either (A) or (B); depends on the material

Discuss this answer

Function of gear box is to

A. Reduce the speed

B. Obtain variable speed

C. Increase the speed

D. Produce high torque

Discuss this answer

Yield strength of a polycrystalline metal with an average grain size d, is proportional to

A. d^1/2

B. d^-1/2

C. d

D. d^-1

Discuss this answer

Metalloids

A. Are good conductor of heat & electricity

B. Act as electron donors with metals & as electron acceptor with non-metals

C. Are not necessarily solids at room temperature

D. Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

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Which of the following mainly decides the current to be employed is arc welding?

A. Electrode size

B. Plate thickness

C. Voltage across the arc

D. Welded portion length

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A dense structure of grinding wheel is not used for the

A. Ductile material

B. Hard materials

C. Brittle materials

D. Finishing cuts

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The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

A. 159

B. 1837

C. 2537

D. 10000

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As the fluid flow rate increases, the float of the Rotameter

A. Rises in the tube

B. Rotates at higher speed

C. Rotates at lower speed

D. Drops down in the tube

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At 100% relative humidity, the dew point temperature of moist air is

A. Less than the wet bulb temperature

B. More than the wet bulb temperature

C. Equal to the wet bulb temperature

D. Equal to the ambient temperature

Discuss this answer

Unit of viscosity in CGS system is

A.

B.

C.

D.

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Drossing is a __________ operation.

A. Smelting

B. Dressing

C. Roasting

D. Dressing

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Which of the following phenomenon will exhibit the minimum heat transfer?

A. Boiling

B. Forced convection in air

C. Free convection in air

D. Conduction in air

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Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

A. Emissivity of pipe surface

B. Diameter & length of the pipe

C. Temperature of hot pipe surface & that of air in the room

D. None of these

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If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

A. 2³

B. 2^3/2

C. 2^5/2

D. 2^1/3

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A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.

A. Neutral

B. Ideal

C. Buffer

D. Zero pH

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Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

A. Flanged iron

B. Collar

C. Flexible

D. Expansion

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Normalising of a casting does not

A. Induce stresses in it

B. Refine its grain structure

C. Reduce segregation

D. Improve its mechanical properties

Discuss this answer

Steel is welded using the __________ flame.

A. Carburising

B. Neutral

C. Oxidising

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

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In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

A. 1

B. 1.4

C. 1.5

D. Y = C_p/C_v

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Work done by a/an __________ process is determined by ∫p. dv

A. Adiabatic

B. Quasi-static

C. Isothermal

D. Isentropic

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The value of for air & most common gases can be safely assumed to be

A. 0.8

B. 1

C. 1.4

D. 1.8

Discuss this answer

Which of the following is a boiler accessory
i.e., not a boiler mounting?

A. Blow off cock

B. Feed check valve

C. Feed water pump

D. Stop valve

Discuss this answer

'Cryogenics' is concerned with the generation & use of low temperature in the range of

A. 0°K to 123°K

B. 0°C to - 123°C

C. 0°C to - 273°C

D. 0°K to 273°K

Discuss this answer

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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Which of the following is used to produce draught in the locomotive boilers?

A. Chimney

B. Induced draught fan

C. Forced draught fan

D. Steam jet arrangement

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More than 95% of __________ is present in corundum.

A. SiO₂

B. Al₂O₃

C. CaSiO₂

D. MgO

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While the recrystallisation temperature for pure metals is 0.3 T_m, the same for alloys is equal to __________ × T_m (where, T_m Melting temperature).

A. 0.25

B. 0.45

C. 0.70

D. 0.95

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Pick out the correct statement

A. Jet engine can work, where there is no atmosphere

B. Rocket engines cannot work, where there is no atmosphere

C. Rocket engines carry oxygen required for the combustion in the form of oxidiser

D. Jet engines also carry oxidiser

Discuss this answer

Dielectric

A. Is an electrical insulating material

B. Of low resistivity is preferred

C. Should have high thermal conductivity

D. Need not defy the corrosive action of chemicals

Discuss this answer

Accepted Answer

D. Increasing the concentration of copper sulphate solution

The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following is the most wear resistant grade of carbide used for the cutting tools?

With decrease in the grain size of a material, its creep resistance

Function of gear box is to

Yield strength of a polycrystalline metal with an average grain size d, is proportional to

Metalloids

Which of the following mainly decides the current to be employed is arc welding?

A dense structure of grinding wheel is not used for the

The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

As the fluid flow rate increases, the float of the Rotameter

At 100% relative humidity, the dew point temperature of moist air is

Unit of viscosity in CGS system is

Drossing is a __________ operation.

Which of the following phenomenon will exhibit the minimum heat transfer?

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.

Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

Normalising of a casting does not

Steel is welded using the __________ flame.

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

Work done by a/an __________ process is determined by ∫p. dv

The value of for air & most common gases can be safely assumed to be

Which of the following is a boiler accessory
i.e., not a boiler mounting?

'Cryogenics' is concerned with the generation & use of low temperature in the range of

The hardenability of steel decreases with

Which of the following is used to produce draught in the locomotive boilers?

More than 95% of __________ is present in corundum.

While the recrystallisation temperature for pure metals is 0.3 T_m, the same for alloys is equal to __________ × T_m (where, T_m Melting temperature).

Pick out the correct statement

Dielectric

Also checkout

The emf of a Deniell cell Zn | Zn2+ || Cu2+ | Cu can be increased by

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following is the most wear resistant grade of carbide used for the cutting tools?

With decrease in the grain size of a material, its creep resistance

Function of gear box is to

Yield strength of a polycrystalline metal with an average grain size d, is proportional to

Metalloids

Which of the following mainly decides the current to be employed is arc welding?

A dense structure of grinding wheel is not used for the

The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

As the fluid flow rate increases, the float of the Rotameter

At 100% relative humidity, the dew point temperature of moist air is

Unit of viscosity in CGS system is

Drossing is a __________ operation.

Which of the following phenomenon will exhibit the minimum heat transfer?

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.

Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

Normalising of a casting does not

Steel is welded using the __________ flame.

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

Work done by a/an __________ process is determined by ∫p. dv

The value of for air & most common gases can be safely assumed to be

Which of the following is a boiler accessory i.e., not a boiler mounting?

'Cryogenics' is concerned with the generation & use of low temperature in the range of

The hardenability of steel decreases with

Which of the following is used to produce draught in the locomotive boilers?

More than 95% of __________ is present in corundum.

While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ × Tm (where, Tm Melting temperature).

Pick out the correct statement

Dielectric

Also checkout

The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

Which of the following is a boiler accessory
i.e., not a boiler mounting?

While the recrystallisation temperature for pure metals is 0.3 T_m, the same for alloys is equal to __________ × T_m (where, T_m Melting temperature).