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

Question

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

Correct Answer :

B. 10

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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

Discuss this answer

The difference between gross & net calorific values of fuel is due to the

Discuss this answer

The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is

A. More

B. Less

C. Same

Discuss this answer

Pick out the correct statement about the condensation.

Discuss this answer

The unit of gc is

Discuss this answer

The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

A. 140

B. 180

C. 240

D. 280

Discuss this answer

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

Discuss this answer

Oxyacetylene reducing flame is used while carrying out welding on

Discuss this answer

Angular displacement can be measured suitably by a

Discuss this answer

Induced draft fans provided in large thermal power plant boilers have __________ blades.

Discuss this answer

Holes for riveting purposes should be preferably made by

Discuss this answer

The specific gravity of coal depends mainly on its __________ content.

A. Carbon

C. Ash

Discuss this answer

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

B. Tool

C. Alloy

Discuss this answer

Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation

Discuss this answer

Sub zero treatment of steel is done to

Discuss this answer

In connection with corrosion of metals, passivation is the process that

Discuss this answer

Optical activity is a/an __________ property.

Discuss this answer

The majority charge carriers in p-type silicon are

B. Ions

D. Holes

Discuss this answer

Wrought iron does not have

Discuss this answer

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

A. Rigid

B. Tough

Discuss this answer

The same volume of all gases is representative of their

Discuss this answer

The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x^0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)

A. x^1.5

B. x^0.8

C. x^-1.5

D. x^-0.8

Discuss this answer

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

Discuss this answer

The most suitable material of construction for a sewer to carry sewage under high pressure is

B. Steel

Discuss this answer

Nickel and __________ are the alloying element added in steel to increase its toughness.

Discuss this answer

Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore?

Discuss this answer

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

A. Impact

Discuss this answer

Suitability of steel for its use in cable is judged by its strength in

D. Shear

Discuss this answer

Corona discharge is related to the operation of a/an

Discuss this answer

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

Discuss this answer

Answer 1

A. Sensible heat carried away by the flue gases

Answer 2

B. Heat carried away by the steam from the moisture content of the fuel

Answer 3

C. Heat lost by radiation

Answer 4

D. Heat carried away by steam from the combustion of hydrogen in the fuel

Answer 5

D. More but less than the diameter of bolt

Answer 6

A. Filmwise condensation gives a lower heat transfer rate than the dropwise condensation

Answer 7

B. Suitable coating or vapour additive is used to promote film wise condensation

Answer 8

C. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it

Answer 9

D. Reynolds number of condensing liquid is based on its mass flow rate

Answer 10

A. lb_m/lb_f. ft/sec²

Answer 11

B. lb_f/lb_m. ft/sec²

Answer 12

C. ft/sec²

Answer 13

D. lb_m/lb_f. sec²/ft

Answer 14

A. Enthalpy

Answer 15

B. Relative humidity

Answer 16

C. Wet bulb temperature

Answer 17

D. Dew point temperature

Answer 18

A. Alloy steel

Answer 19

B. Grey cast iron

Answer 20

C. Mild steel

Answer 21

D. High carbon steel

Answer 22

A. Shaft encoder

Answer 23

B. Linear variable differential transducer (LVDT)

Answer 24

C. Stroboscope

Answer 25

D. Tachometer

Answer 26

A. Forward curved

Answer 27

B. Backward curved

Answer 28

C. Double curved

Answer 29

D. Radial or straight

Answer 30

A. Cutting torch

Answer 31

B. Drilling

Answer 32

C. Punching

Answer 33

D. None of these

Answer 34

B. Volatile matter

Answer 35

D. Moisture

Answer 36

A. Wrought

Answer 37

D. Plain carbon

Answer 38

A. Pressure falls below the vapour pressure

Answer 39

B. Pressure becomes very high

Answer 40

C. Temperature becomes low

Answer 41

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

Answer 42

A. Suppress martensite transformation

Answer 43

B. Enhance its working performance in sub zero atmosphere

Answer 44

C. Reduce the retained austenite in hardened steel

Answer 45

D. Induce temper brittleness after its hardening

Answer 46

A. Intensifies deterioration

Answer 47

B. Changes the composition of the metal

Answer 48

C. Inhibits further deterioration

Answer 49

D. None of these

Answer 50

A. Additive

Answer 51

B. Constitutive

Answer 52

C. Both (A) & (B)

Answer 53

D. Neither (A) nor (B)

Answer 54

A. Free electrons

Answer 55

C. Conduction electrons

Answer 56

A. Uniform strength in all directions

Answer 57

B. Ability to hold protective coating

Answer 58

C. High ductility & corrosion resistance

Answer 59

D. Easily weldable characteristics

Answer 60

C. Ductile

Answer 61

D. Plastic

Answer 62

A. Specific gravities

Answer 63

B. Densities

Answer 64

C. Gas characteristic constants

Answer 65

D. Molecular weights

Answer 66

A. Water alkalinity & leakage

Answer 67

B. Hydrazine addition during feed water treatment

Answer 68

C. Release of non-condensable gas from water in the boiler

Answer 69

D. Scale formation

Answer 70

A. Asbestos cement

Answer 71

C. Cement concrete

Answer 72

D. Stoneware

Answer 73

A. Molybdenum

Answer 74

B. Chromium

Answer 75

C. Vanadium

Answer 76

D. Silicon

Answer 77

A. High fusibility & fluidity

Answer 78

B. High thermal conductivity

Answer 79

C. Low density

Answer 80

D. High chemical activity

Answer 81

B. Completely reversed

Answer 82

C. Dynamic

Answer 83

D. Static & dynamic

Answer 84

A. Tension

Answer 85

B. Compression

Answer 86

C. Torsion

Answer 87

A. Induction motor

Answer 88

B. Electrostatic precipitator

Answer 89

C. Fast breeder reactor

Answer 90

D. Magneto hydrodynamic generator (MHD)

Answer 91

D. Y = C_p/C_v

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

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

The difference between gross & net calorific values of fuel is due to the

The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is

Pick out the correct statement about the condensation.

The unit of gc is

The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

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

Oxyacetylene reducing flame is used while carrying out welding on

Angular displacement can be measured suitably by a

Induced draft fans provided in large thermal power plant boilers have __________ blades.

Holes for riveting purposes should be preferably made by

The specific gravity of coal depends mainly on its __________ content.

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation

Sub zero treatment of steel is done to

In connection with corrosion of metals, passivation is the process that

Optical activity is a/an __________ property.

The majority charge carriers in p-type silicon are

Wrought iron does not have

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

The same volume of all gases is representative of their

The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x^0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

The most suitable material of construction for a sewer to carry sewage under high pressure is

Nickel and __________ are the alloying element added in steel to increase its toughness.

Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore?

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

Suitability of steel for its use in cable is judged by its strength in

Corona discharge is related to the operation of a/an

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

Also checkout

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

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

The difference between gross & net calorific values of fuel is due to the

The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is

Pick out the correct statement about the condensation.

The unit of gc is

The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

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

Oxyacetylene reducing flame is used while carrying out welding on

Angular displacement can be measured suitably by a

Induced draft fans provided in large thermal power plant boilers have __________ blades.

Holes for riveting purposes should be preferably made by

The specific gravity of coal depends mainly on its __________ content.

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation

Sub zero treatment of steel is done to

In connection with corrosion of metals, passivation is the process that

Optical activity is a/an __________ property.

The majority charge carriers in p-type silicon are

Wrought iron does not have

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

The same volume of all gases is representative of their

The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

The most suitable material of construction for a sewer to carry sewage under high pressure is

Nickel and __________ are the alloying element added in steel to increase its toughness.

Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore?

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

Suitability of steel for its use in cable is judged by its strength in

Corona discharge is related to the operation of a/an

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

Also checkout

The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x^0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)