Pick out the wrong statement about nucleate boiling.

Question

Pick out the wrong statement about nucleate boiling.

A. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface

B. Surface temperature is greater than the saturation temperature of the liquid

C. Heat transfer from the surface of the liquid is less than that in film boiling

D. The temperature is less than that of film boiling

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Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

A. 1

B. 10

C. 30

D. 50

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Atomic __________ of an element is a whole number.

A. Weight

B. Number

C. Volume

D. Radius

Discuss this answer

Holes for riveting purposes should be preferably made by

A. Cutting torch

B. Drilling

C. Punching

D. None of these

Discuss this answer

Insulation of liquid surface can be achieved by __________ on top of its surface.

A. Floating hollow polypropylene spheres

B. Spraying alumina powder

C. Putting cement

D. None of these

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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

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The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : C_p of copper is 23 J K^-1mole^-1)

A. 2300 J

B. 4600 J

C. 230 J

D. 2.3 × 10⁶ J

Discuss this answer

Annealing of cast iron

A. Softens it to facilitate machining

B. Decreases the free carbon

C. Increases the strength

D. None of these

Discuss this answer

Gantt charts are used for streamlining the

A. Inventory control

B. Production schedule

C. Sales forecasting

D. Quality control

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

Oxyacetylene reducing flame is used while carrying out welding on

A. Alloy steel

B. Grey cast iron

C. Mild steel

D. High carbon steel

Discuss this answer

Which of the following gases cause global warming?

A. Carbon monoxide

B. Carbon dioxide

C. Nitrogen

D. Ozone

Discuss this answer

Wavelength of radiation emitted by a body depends on the __________ of its surface.

A. Temperature

B. Area

C. Nature

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

Discuss this answer

Hot & cold working of material causes its __________ deformation.

A. Visco-elastic

B. Isotropic

C. Elastic

D. Plastic

Discuss this answer

Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.

A. Joule

B. Carnot

C. Rankine

D. Brayton

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Which of the following commonly used condenser tube materials has the lowest thermal conductivity?

A. Admiralty brass

B. Stainless steel

C. Aluminium brass

D. Titanium

Discuss this answer

Pick out the wrong statement.

A. Complete unity of command exists in a line organisation

B. Line organisation is net suitable for expansion and growth of an industry

C. In line and staff organisation, line executes and staff directs

D. None of these

Discuss this answer

The most important requirement for aluminium industry is the availability of cheap

A. Ore

B. Electrical power

C. Labour

D. Abundant water

Discuss this answer

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

A. Cyaniding

B. Sherardizing

C. Spheroidising

D. None of these

Discuss this answer

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

A. Is always less than 1

B. Is always greater than 1

C. Can be 5

D. Depends on the choice of the standard state

Discuss this answer

Evaporative cooling process employs a combination of cooling and humidification in which the

A. Sensible heat is added

B. Sensible heat is removed and the latent heat is added

C. Latent heat is removed

D. Sensible heat is added and latent heat is removed

Discuss this answer

The type of pump used for lifting large quantity of sewage is a __________ pump.

A. Gear

B. Centrifugal

C. Reciprocating

D. Plunger

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For efficient performance of a blast furnace, the extent of reduction of Wustite (F_eO) should be

A. 100% indirect reduction

B. 100% direct reduction

C. 50-60% indirect reduction

D. 30-40% indirect reduction

Discuss this answer

The ratio of the shear stress to the principal stress on a principal plane is

A. 0

B. 1

C. 1/2

D. 1/3

Discuss this answer

Particle nature of cathode rays is proved due to the fact that they

A. Travel in a straight line

B. Get deflected by magnetic electric field

C. Produce fluorescence

D. Heat the exposed material

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The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

A. Equal to

B. Greater than

C. Less than

D. Either (A), (B) or (C); depends on the size of atom

Discuss this answer

In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

A. t = 15 - 0.0065 h

B. t = 15 + 0.0065 h

C. t = 0.0035 h - 15

D. t = 15 - 0.0035 h

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

Discuss this answer

Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

A. Aluminium

B. Copper

C. Titanium

D. Stainless steel

Discuss this answer

Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to

A. (r₂ - r₁)/r₁. r₂

B. r₁. r₂/(r₂- r₁)

C. (r₂ + r₁)/r₁. r₂

D. r₁. r₂/(r₂ + r₁)

Discuss this answer

The main reducing agent in iron blast furnace is

A. Carbon dioxide

B. Carbon monoxide

C. Oxygen

D. Air

Discuss this answer

Accepted Answer

D. The temperature is less than that of film boiling

Pick out the wrong statement about nucleate boiling.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

Atomic __________ of an element is a whole number.

Holes for riveting purposes should be preferably made by

Insulation of liquid surface can be achieved by __________ on top of its surface.

Propulsion of rocket follows from the

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : C_p of copper is 23 J K^-1mole^-1)

Annealing of cast iron

Gantt charts are used for streamlining the

Viscoelastic behaviour is observed in __________ materials.

Oxyacetylene reducing flame is used while carrying out welding on

Which of the following gases cause global warming?

Wavelength of radiation emitted by a body depends on the __________ of its surface.

Hot & cold working of material causes its __________ deformation.

Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.

Which of the following commonly used condenser tube materials has the lowest thermal conductivity?

Pick out the wrong statement.

The most important requirement for aluminium industry is the availability of cheap

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

Evaporative cooling process employs a combination of cooling and humidification in which the

The type of pump used for lifting large quantity of sewage is a __________ pump.

For efficient performance of a blast furnace, the extent of reduction of Wustite (F_eO) should be

The ratio of the shear stress to the principal stress on a principal plane is

Particle nature of cathode rays is proved due to the fact that they

The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

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

Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to

The main reducing agent in iron blast furnace is

Also checkout

Pick out the wrong statement about nucleate boiling.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

Atomic __________ of an element is a whole number.

Holes for riveting purposes should be preferably made by

Insulation of liquid surface can be achieved by __________ on top of its surface.

Propulsion of rocket follows from the

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1)

Annealing of cast iron

Gantt charts are used for streamlining the

Viscoelastic behaviour is observed in __________ materials.

Oxyacetylene reducing flame is used while carrying out welding on

Which of the following gases cause global warming?

Wavelength of radiation emitted by a body depends on the __________ of its surface.

Hot & cold working of material causes its __________ deformation.

Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.

Which of the following commonly used condenser tube materials has the lowest thermal conductivity?

Pick out the wrong statement.

The most important requirement for aluminium industry is the availability of cheap

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

Evaporative cooling process employs a combination of cooling and humidification in which the

The type of pump used for lifting large quantity of sewage is a __________ pump.

For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be

The ratio of the shear stress to the principal stress on a principal plane is

Particle nature of cathode rays is proved due to the fact that they

The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

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

Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional to

The main reducing agent in iron blast furnace is

Also checkout

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : C_p of copper is 23 J K^-1mole^-1)

For efficient performance of a blast furnace, the extent of reduction of Wustite (F_eO) should be

Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to