During sensible heating of humid air

Question

During sensible heating of humid air

A. Relative humidity increases

B. Dew point remains constant

C. Dry bulb & wet bulb temperature increases

D. Both 'b' & 'c'

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Maximum consumption of limestone is in the __________ industry.

A. Iron and steel

B. Cement

C. Glass

D. Fertiliser

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

A. Surface roughness

B. Pores

C. Spherical inclusion

D. Crack

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Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?

A. Enthalpy

B. Relative humidity

C. Wet bulb temperature

D. Dew point temperature

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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

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Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is

A.

B.

C.

D.

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With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.

A. Impact strength

B. Percent elongation

C. Hardness

D. Both 'b' & 'c'

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Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

A. Retained austenite

B. Martensite formation

C. Relatively high sulphur content in the base metal

D. Sufficient hydrogen present in the welding arc

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Nusselt number/Biot number varies

A. Inversely with thermal conductivity

B. Directly with heat transfer co-efficient

C. Directly with thermal conductivity

D. Inversely with the dimension of the solid

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Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

A. Below the yield point

B. Above the yield point

C. Below the elastic limit

D. At the elastic limit

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The activity co-efficient of the solute in a dilute solution

A. Decreases with the increase of concentration of the solute

B. Increases with the increase of concentration of the solute

C. Remains constant

D. Is unity at infinite dilution

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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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Lap joints are preferred over butt joints in soldering/brazing, because these joints are

A. Weaker in tension but stronger in shear

B. Weaker in shear but stronger in tension

C. Stronger in both shear and tension

D. The lap joints are easily made

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Pick out the wrong statement.

A. A ferromagnetic material becomes paramagnetic above the 'Curie temperature'

B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials

C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces

D. Tungsten steel and alnico are not hard magnetic materials

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In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

A. Mechanical

B. Overall

C. Volumetric

D. Impeller

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Potable water means the water used for

A. Fire-fighting

B. Cooling

C. Drinking

D. Evaporation to produce steam

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Which of the following is not the function of a volute casing provided in a centrifugal pump?

A. To reduce the head loss in discharge

B. To increase the pump efficiency

C. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity

D. To increase the pump discharge rate

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

A. Flux

B. Slag

C. Protective layer

D. Binder

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The condition of diffraction from a crystal is given by

A. nλ = 2d Sin θ

B. λ = d Sin 2θ

C. λ = 2d Sin 2θ

D. nλ = d Sin θ

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Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.
A. Induced draft fan
B. Economiser
C. Air preheater
D. Steam superheater Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories?

A. A, C, B, D

B. D, B, C, A

C. D, C, B, A

D. D, A, B, C

Discuss this answer

Titanium is added to molten aluminium alloys before casting for the purpose of

A. Grain refinement

B. Increasing corrosion resistance

C. Reducing porosity

D. Improving fluidity

Discuss this answer

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

A. 9 : 1

B. 17 : 1

C. 23 : 1

D. 29 : 1

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Cold heading or upsetting is categorised as the __________ process.

A. Extrusion

B. Bending

C. Rolling

D. Forging

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Euler number is defined as the ratio of inertia force to __________ force.

A. Pressure

B. Elastic

C. Gravity

D. Viscous

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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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Oxide layer formed on the non-ferrous metal surface after its annealing is

A. Removed by acid pickling

B. Hammered into the surface

C. Removed with coarse emery cloth

D. Left as such to protect the surface

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Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling.

A. Film

B. Nucleate

C. Transition

D. All modes of

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Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.

A. Parting

B. Synthetic

C. Loam

D. Dry

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Main constituent of bone ash is

A. Ammonium phosphate

B. Calcium phosphate

C. Animal charcoal

D. Ammonium sulphate

Discuss this answer

Unbreakable crockeries are made from __________ polymers.

A. Polystyrene

B. Melamine

C. Polystyrene

D. Polyurethane

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Pick out the wrong statement.

A. The X-rays cannot be deflected by electric field unlike cathode rays

B. The intensity of X-rays can be measured by ionisation current produced due to the ionisation of gas by X-rays

C. The quality of X-rays can be controlled by varying the anode-cathode voltage

D. Crystal structure of a material can be studied by an electron microscope

Discuss this answer

Accepted Answer

D. Both 'b' & 'c'

During sensible heating of humid air

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Maximum consumption of limestone is in the __________ industry.

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

Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?

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

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is

With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Nusselt number/Biot number varies

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

The activity co-efficient of the solute in a dilute solution

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

Lap joints are preferred over butt joints in soldering/brazing, because these joints are

Pick out the wrong statement.

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

Potable water means the water used for

Which of the following is not the function of a volute casing provided in a centrifugal pump?

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

The condition of diffraction from a crystal is given by

Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.
A. Induced draft fan
B. Economiser
C. Air preheater
D. Steam superheater Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories?

Titanium is added to molten aluminium alloys before casting for the purpose of

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

Cold heading or upsetting is categorised as the __________ process.

Euler number is defined as the ratio of inertia force to __________ force.

The noble metals

Oxide layer formed on the non-ferrous metal surface after its annealing is

Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling.

Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.

Main constituent of bone ash is

Unbreakable crockeries are made from __________ polymers.

Pick out the wrong statement.

Also checkout

During sensible heating of humid air

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Maximum consumption of limestone is in the __________ industry.

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

Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?

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

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is

With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Nusselt number/Biot number varies

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

The activity co-efficient of the solute in a dilute solution

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

Lap joints are preferred over butt joints in soldering/brazing, because these joints are

Pick out the wrong statement.

In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller).

Potable water means the water used for

Which of the following is not the function of a volute casing provided in a centrifugal pump?

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

The condition of diffraction from a crystal is given by

Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.A. Induced draft fanB. EconomiserC. Air preheaterD. Steam superheater Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories?

Titanium is added to molten aluminium alloys before casting for the purpose of

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

Cold heading or upsetting is categorised as the __________ process.

Euler number is defined as the ratio of inertia force to __________ force.

The noble metals

Oxide layer formed on the non-ferrous metal surface after its annealing is

Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling.

Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.

Main constituent of bone ash is

Unbreakable crockeries are made from __________ polymers.

Pick out the wrong statement.

Also checkout

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

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).