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

Question

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

Correct Answer :

A. Film

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Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

A.

B.

C.

D.

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Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.

C. Slip

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The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

A. More

B. Equal

C. Less

D. Double

Discuss this answer

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

A. 20

B. 60

C. 120

D. ∞

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

B. Pores

D. Crack

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__________ iron is produced by the annealing of white cast iron.

D. Grey

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The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability?

A. Lead

B. Copper

Discuss this answer

Quartz is a __________ material.

Discuss this answer

Addition of silicon to cast iron

Discuss this answer

Dephosphorization of molten pig iron is favoured by

Discuss this answer

The hardenability of steel decreases with

Discuss this answer

Colour comparator is used to measure the

Discuss this answer

Cemented carbide tools are not suitable for cutting

B. Brass

D. Steel

Discuss this answer

Nickel is a __________ material.

Discuss this answer

Pick out the correct statement.

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The unit of gc is

Discuss this answer

A compact estimate about the amount of materials handling between various work stations is obtained from the

Discuss this answer

Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.

A. Volume

C. Heat

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

A. 2

B. 3

C. 0.8

D. 6

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

Discuss this answer

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

Discuss this answer

The normal stress is the same in all directions at a point in a fluid, only when the fluid

Discuss this answer

Which of the, following is not associated with the functioning of a petrol engine?

Discuss this answer

In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be

Discuss this answer

Fire refining process is employed in case of

A. Tin

B. Copper

C. Zinc

Discuss this answer

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.

A. 370

B. 340

C. 320

D. 300

Discuss this answer

What is the range of tempering temperature (°C) for most of the materials?

A. 75-100

Discuss this answer

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

Discuss this answer

Minimum thermal efficiency of a steam boiler may be around __________ percent

A. 25

B. 45

C. 65

D. 20

Discuss this answer

Function of gear box is to

Discuss this answer

Answer 1

B. Nucleate

Answer 2

C. Transition

Answer 3

D. All modes of

Answer 4

A. Fracture

Answer 5

B. Dislocation

Answer 6

D. Twinning

Answer 7

A. Surface roughness

Answer 8

C. Spherical inclusion

Answer 9

A. Malleable

Answer 10

B. Nodular

Answer 11

C. Ductile

Answer 12

C. Aluminium

Answer 13

D. Wrought iron

Answer 14

A. Diamagnetic

Answer 15

B. Ferromagnetic

Answer 16

C. Ferroelectric

Answer 17

D. Piezoelectric

Answer 18

A. Promotes graphite module formation

Answer 19

B. Improves its ductility

Answer 20

C. Does not promote graphite flakes formation

Answer 21

D. Increases the fluidity of molten metal

Answer 22

A. Oxidising and basic slag

Answer 23

B. Reducing and basic slag

Answer 24

C. High activity co-efficient of phosphorous in metal

Answer 25

D. Oxidising and neutral slag

Answer 26

A. Decrease in dislocation density

Answer 27

B. Increase in solutionising temperature

Answer 28

C. Increase in strength

Answer 29

D. Decrease in grain size

Answer 30

A. pH value

Answer 31

B. Electrode potential

Answer 32

C. Colour intensity

Answer 33

D. None of these

Answer 34

A. Aluminium

Answer 35

C. Cast iron

Answer 36

A. Ferromagnetic

Answer 37

B. Semi-conductor

Answer 38

C. Paramagnetic

Answer 39

D. Ferroelectric

Answer 40

A. Materials exhibiting high elasticity obey Hooke's law

Answer 41

B. The elastic behaviour of rubber under compression is the same as its behaviour under tension

Answer 42

C. The damping capacity of a material is due to its plastic deformation

Answer 43

D. The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations

Answer 44

A. lb_m/lb_f. ft/sec²

Answer 45

B. lb_f/lb_m. ft/sec²

Answer 46

C. ft/sec²

Answer 47

D. lb_m/lb_f. sec²/ft

Answer 48

A. Gantt chart

Answer 49

B. Bin chart

Answer 50

C. String diagram

Answer 51

D. Travel chart

Answer 52

B. Pressure

Answer 53

D. None of these

Answer 54

A. 100% indirect reduction

Answer 55

B. 100% direct reduction

Answer 56

C. 50-60% indirect reduction

Answer 57

D. 30-40% indirect reduction

Answer 58

A. Reynolds number (based on sphere diameter) should be < 1

Answer 59

B. Flow around the sphere should be in turbulent region

Answer 60

C. Sphere must be metallic

Answer 61

D. Fluid density should be constant

Answer 62

A. Is at rest & has zero viscosity

Answer 63

B. Is frictionless

Answer 64

C. Fluid layer has no motion relative to an adjacent layer of fluid

Answer 65

D. is incompressible & frictionless

Answer 66

A. Compression ignition system

Answer 67

B. Spark plug

Answer 68

C. Carburettor

Answer 69

D. Otto cycle

Answer 70

A. Conduction

Answer 71

B. Radiation

Answer 72

C. Natural convection

Answer 73

D. Forced convection

Answer 74

D. Aluminium

Answer 75

B. 200-300

Answer 76

C. 350-450

Answer 77

D. 500-600

Answer 78

A. Reduce the speed

Answer 79

B. Obtain variable speed

Answer 80

C. Increase the speed

Answer 81

D. Produce high torque

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.

The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

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

__________ iron is produced by the annealing of white cast iron.

The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability?

Quartz is a __________ material.

Addition of silicon to cast iron

Dephosphorization of molten pig iron is favoured by

The hardenability of steel decreases with

Colour comparator is used to measure the

Cemented carbide tools are not suitable for cutting

Nickel is a __________ material.

Pick out the correct statement.

The unit of gc is

A compact estimate about the amount of materials handling between various work stations is obtained from the

Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.

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

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

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

The normal stress is the same in all directions at a point in a fluid, only when the fluid

Which of the, following is not associated with the functioning of a petrol engine?

In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be

Fire refining process is employed in case of

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.

What is the range of tempering temperature (°C) for most of the materials?

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?

Minimum thermal efficiency of a steam boiler may be around __________ percent

Function of gear box is to

Also checkout

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.

The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

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

__________ iron is produced by the annealing of white cast iron.

The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability?

Quartz is a __________ material.

Addition of silicon to cast iron

Dephosphorization of molten pig iron is favoured by

The hardenability of steel decreases with

Colour comparator is used to measure the

Cemented carbide tools are not suitable for cutting

Nickel is a __________ material.

Pick out the correct statement.

The unit of gc is

A compact estimate about the amount of materials handling between various work stations is obtained from the

Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.

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

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

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

The normal stress is the same in all directions at a point in a fluid, only when the fluid

Which of the, following is not associated with the functioning of a petrol engine?

In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be

Fire refining process is employed in case of

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.

What is the range of tempering temperature (°C) for most of the materials?

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?

Minimum thermal efficiency of a steam boiler may be around __________ percent

Function of gear box is to

Also checkout

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