Quantity of coke produced from metallurgical coal may be around __________ percent. (A) 30 (B) 50 (C) 75 (D) 95

Quantity of coke produced from metallurgical coal may be around
__________ percent.
(A) 30
(B) 50
(C) 75
(D) 95
by

1 Answer

Answer :

(C) 75
by

Related questions

Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent. (A) 80 and 97 (B) 95 and 100 (C) 40 and 70 (D) 25 and 97

Description : Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent. (A) 80 and 97 (B) 95 and 100 (C) 40 and 70 (D) 25 and 97

Last Answer : (A) 80 and 97

Volatile matter content of metallurgical coke may be around __________ percent. (A) 1-2 (B) 10-15 (C) 22-26 (D) 30-33

Description : Volatile matter content of metallurgical coke may be around __________ percent. (A) 1-2 (B) 10-15 (C) 22-26 (D) 30-33

Last Answer : (A) 1-2

Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm3 . (A) 30 (B) 300 (C) 3,000 (D) 30,000

Description : Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm3 . (A) 30 (B) 300 (C) 3,000 (D) 30,000

Last Answer : (B) 300

Most chemical plants use an initial working capital amounting to 10- 20% of the total capital investment. But this percentage may increase to __________ percent in case of seasonal products manufacturing plant. (A) 30 (B) 50 (C) 75 (D) 95

Description : Most chemical plants use an initial working capital amounting to 10- 20% of the total capital investment. But this percentage may increase to __________ percent in case of seasonal products manufacturing plant. (A) 30 (B) 50 (C) 75 (D) 95

Last Answer : (B) 50

Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent. (A) 6 (B) 12 (C) 18 (D) 24

Description : Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent. (A) 6 (B) 12 (C) 18 (D) 24

Last Answer : (D) 24

Caking index of the coal blend used for the manufacture of metallurgical coke should be around (A) 5 (B) 21 (C) 40 (D) 48

Description : Caking index of the coal blend used for the manufacture of metallurgical coke should be around (A) 5 (B) 21 (C) 40 (D) 48

Last Answer : (B) 21

Sucrose content in cane sugar may be around __________ percent. (A) 50 (B) 70 (C) 95(D) 80

Description : Sucrose content in cane sugar may be around __________ percent. (A) 50 (B) 70 (C) 95 (D) 80

Last Answer : (C) 95

Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm. (A) 3-5 (B) 25-30 (C) 60-65 (D) 95-100

Description : Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm. (A) 3-5 (B) 25-30 (C) 60-65 (D) 95-100

Last Answer : (B) 25-30

Grinding efficiency of a ball mill is of the order of __________ percent. (A) 1-5 (B) 40-50 (C) 75-80 (D) 90-95

Description : Grinding efficiency of a ball mill is of the order of __________ percent. (A) 1-5 (B) 40-50 (C) 75-80 (D) 90-95

Last Answer : (A) 1-5

Higher percentage of ash in coal meant for the production of metallurgical grade coke (A) Decreases the hardness of coke (B) Decreases the abrasion resistance of coke (C) Causes brittleness in steel (D) None of these

Description : Higher percentage of ash in coal meant for the production of metallurgical grade coke (A) Decreases the hardness of coke (B) Decreases the abrasion resistance of coke (C) Causes brittleness in steel (D) None of these

Last Answer : (D) None of these

Low temperature carbonisation of coal produces (A) Metallurgical coke (B) Soft coke (C) Very low calorific value coke oven gas (D) No by-products

Description : Low temperature carbonisation of coal produces (A) Metallurgical coke (B) Soft coke (C) Very low calorific value coke oven gas (D) No by-products

Last Answer : (B) Soft coke

. Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent. (A) 75 (B) < 10 (C) > 30 (D) 50

Description : . Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent. (A) 75 (B) < 10 (C) > 30 (D) 50

Last Answer : (B) < 10

The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent. (A) 60 (B) 30 (C) 95 (D) 100

Description : The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent. (A) 60 (B) 30 (C) 95 (D) 100

Last Answer : (A) 60

Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent. (A) 10-15 (B) 25-30 (C) 45-50 (D) 65-70

Description : Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent. (A) 10-15 (B) 25-30 (C) 45-50 (D) 65-70

Last Answer : (B) 25-30

Sulphur in metallurgical coal (A) Contributes to its heating value (B) Affects the quality of steel produced as cracks develop on the surface while rolling the steel (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Sulphur in metallurgical coal (A) Contributes to its heating value (B) Affects the quality of steel produced as cracks develop on the surface while rolling the steel (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) and (B)

Polycaprolactam (Nylon - 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about __________ percent. (A) 50 (B) 75 (C) 90 (D) 99

Description : Polycaprolactam (Nylon - 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about __________ percent. (A) 50 (B) 75 (C) 90 (D) 99

Last Answer : (C) 90

Alcohol content in freshly prepared natural and fortified **** may be respectively around __________ percent. (A) 7-14 and 14-30 (B) 7-14 and 40-50 (C) 14 - 30 and 40-50 (D) 10 - 20 and 40 - 50

Description : Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent. (A) 7-14 and 14-30 (B) 7-14 and 40-50 (C) 14 - 30 and 40-50 (D) 10 - 20 and 40 - 50

Last Answer : (A) 7-14 and 14-30

Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent. (A) 5 (B) 25 (C) 55 (D) 75

Description : Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent. (A) 5 (B) 25 (C) 55 (D) 75

Last Answer : (B) 25

Producer gas containing least amount of tar is produced by the (A) Partial combustion of coal (B) Partial combustion of large size (< 50 mm) coke (C) High pressure gasification of coal (e.g. in Lurgi gasifier) (D) Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)

Description : Producer gas containing least amount of tar is produced by the (A) Partial combustion of coal (B) Partial combustion of large size (< 50 mm) coke (C) High pressure gasification of coal (e.g. in Lurgi gasifier) (D) Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)

Last Answer : (B) Partial combustion of large size (< 50 mm) coke

Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. (A) 10 (B) 50 (C) 80 (D) 95

Description : Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. (A) 10 (B) 50 (C) 80 (D) 95

Last Answer : (B) 50

A good metallurgical coke should have very low (A) Sulphur & phosphorous content (B) Porosity (C) Fusion point of its ash (D) Hardness & strength

Description : A good metallurgical coke should have very low (A) Sulphur & phosphorous content (B) Porosity (C) Fusion point of its ash (D) Hardness & strength

Last Answer : (A) Sulphur & phosphorous content

Which of the following coke has the least percentage of ash? (A) Petroleum coke (B) Beehive coke (C) Foundry coke (D) Metallurgical coke

Description : Which of the following coke has the least percentage of ash? (A) Petroleum coke (B) Beehive coke (C) Foundry coke (D) Metallurgical coke

Last Answer : (A) Petroleum coke

Desirable "Micum Index" values of metallurgical coke are (A) M40 > 78% and M10 < 10% (B) M40 > 4% and M10 < 80% (C) M40 > 10% and M10 < 78% (D) M40 > 98% and M10 < 2%

Description : Desirable "Micum Index" values of metallurgical coke are (A) M40 > 78% and M10 < 10% (B) M40 > 4% and M10 < 80% (C) M40 > 10% and M10 < 78% (D) M40 > 98% and M10 < 2%

Last Answer : (A) M40 > 78% and M10 < 10%

A good metallurgical coke (A) Should have high porosity (B) Should be brittle (C) Must contain moderate quantities of ash, moisture, sulphur and volatile matters (D) Should have low fusion point of its ash

Description : A good metallurgical coke (A) Should have high porosity (B) Should be brittle (C) Must contain moderate quantities of ash, moisture, sulphur and volatile matters (D) Should have low fusion point of its ash

Last Answer : (A) Should have high porosity

Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm3 . (A) 4000 (B) 2500 (C) 6500 (D) 10000

Description : Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm3 . (A) 4000 (B) 2500 (C) 6500 (D) 10000

Last Answer : (C) 6500

Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced. (A) Colour (B) Moisture content (C) Ash content (D) Volatile matter

Description : Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced. (A) Colour (B) Moisture content (C) Ash content (D) Volatile matter

Last Answer : (D) Volatile matter

In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. (A) Difference in gross & net calorific value of the coke oven gas (B) Free carbon content in tar (C) Yield percentage of coke (D) Yield of ammonia present in coke oven gas

Description : In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. (A) Difference in gross & net calorific value of the coke oven gas (B) Free carbon content in tar (C) Yield percentage of coke (D) Yield of ammonia present in coke oven gas

Last Answer : (A) Difference in gross & net calorific value of the coke oven gas

Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr. (A) 2.5 (B) 0.5 (C) 10 (D) 20

Description : Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr. (A) 2.5 (B) 0.5 (C) 10 (D) 20

Last Answer : (A) 2.5

Abrasion index of blast furnace coke should be around __________ percent. (A) 20 (B) 35 (C) 55 (D) 80

Description : Abrasion index of blast furnace coke should be around __________ percent. (A) 20 (B) 35 (C) 55 (D) 80

Last Answer : (D) 80

Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent. (A) 15 to 25 (B) 35 to 45 (C) 55 to 75 (D) 75

Description : Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent. (A) 15 to 25 (B) 35 to 45 (C) 55 to 75 (D) 75

Last Answer : (B) 35 to 45

High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Large quantity of tar compared to low temperature carbonisation (D) None of these

Description : High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Large quantity of tar compared to low temperature carbonisation (D) None of these

Last Answer : (D) None of these

High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation(B) Less of gases compared to liquid products(C) Larger quantity of tar compared to low temperature carbonisation(D) None of these

Description : High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Larger quantity of tar compared to low temperature carbonisation (D) None of these

Last Answer : (D) None of these

Water comprises approximately ____ percent of cleaning and sanitizing solutions. a. 80 to 89 c. 90 to 95 b. 95 to 99 d. 75 to 85

Description : Water comprises approximately ____ percent of cleaning and sanitizing solutions. a. 80 to 89 c. 90 to 95 b. 95 to 99 d. 75 to 85

Last Answer : b. 95 to 99

Presence of phosphorous in metallurgical coal (A) Is not undesirable (B) Reduces its calorific value (C) Badly affects the quality of steel

Description : Presence of phosphorous in metallurgical coal (A) Is not undesirable (B) Reduces its calorific value (C) Badly affects the quality of steel

Last Answer : (C) Badly affects the quality of steel

The main industrial source of emission of hydrogen sulphide air pollutant is (A) Petroleum refineries (B) Coal based thermal power plants (C) Pulp and paper plant (D) Metallurgical roasting & smelting plant

Description : The main industrial source of emission of hydrogen sulphide air pollutant is (A) Petroleum refineries (B) Coal based thermal power plants (C) Pulp and paper plant (D) Metallurgical roasting & smelting plant

Last Answer : (B) Coal based thermal power plants

Percentage of methane in coke oven gas may be around (A) 5 (B) 15 (C) 25 (D) 50

Description : Percentage of methane in coke oven gas may be around (A) 5 (B) 15 (C) 25 (D) 50

Last Answer : (C) 25

Cetane number of high speed diesel must be ≥ (A) 30 (B) 45 (C) 75 (D) 95

Description : Cetane number of high speed diesel must be ≥ (A) 30 (B) 45 (C) 75 (D) 95

Last Answer : (B) 45

For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume. (A) 10 (B) 25 (C) 50 (D) 75

Description : For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume. (A) 10 (B) 25 (C) 50 (D) 75

Last Answer : (C) 50

Yield of charcoal in high temperature carbonisation of wood is about __________ percent. (A) 10 (B) 25 (C) 50 (D) 75

Description : Yield of charcoal in high temperature carbonisation of wood is about __________ percent. (A) 10 (B) 25 (C) 50 (D) 75

Last Answer : (B) 25

P2O5 content in triple superphosphate is about __________ percent. (A) 42-50 (B) 15-20 (C) 85-90 (D) 70-75

Description : P2O5 content in triple superphosphate is about __________ percent. (A) 42-50 (B) 15-20 (C) 85-90 (D) 70-75

Last Answer : (A) 42-50

High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent. (A) 5 to 10 (B) 15 to 25 (C) 45 to 50 (D) 75 to 80

Description : High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ ... to 10 (B) 15 to 25 (C) 45 to 50 (D) 75 to 80

Last Answer : (C) 45 to 50

Carbon content of pitch (residue of coal tar distillation) is around __________ percent. (A) 70 (B) 55(C) 80 (D) 94

Description : Carbon content of pitch (residue of coal tar distillation) is around __________ percent. (A) 70 (B) 55 (C) 80 (D) 94

Last Answer : (D) 94

In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the (A) Gas yield is less (B) Tar yield is more (C) Ignition temperature of coke produced is less (D) Aromatic content of tar produced is more

Description : In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the (A) Gas yield is less (B) Tar yield is more (C) Ignition temperature of coke produced is less (D) Aromatic content of tar produced is more

Last Answer : (D) Aromatic content of tar produced is more

Soft coke is not (A) Produced by low temperature carbonisation of coal (B) A domestic fuel (C) Used in blast furnaces (D) None of these

Description : Soft coke is not (A) Produced by low temperature carbonisation of coal (B) A domestic fuel (C) Used in blast furnaces (D) None of these

Last Answer : (C) Used in blast furnaces

Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has (A) Higher calorific value (B) Lower hydrogen content (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has (A) Higher calorific value (B) Lower hydrogen content (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (D) Neither (A) nor (B)

Pick out the wrong statement. (A) Percentage of ash in coke produced from medium coking coal is more than that in coal (B) The calorific value (kcal/Nm3 ) of coke oven gas reduces on removal of hydrogen from it by cryogenic method (C) Ash is normally removed as 'fly-ash' in Kopper-Totzek process of coal gasification (D) Coal based fertiliser plants in India at Talcher (Orissa) and Ramagundam (A.P) employ Kopper-Totzek process of coal gasification

Description : Pick out the wrong statement. (A) Percentage of ash in coke produced from medium coking coal is more than that in coal (B) The calorific value (kcal/Nm3 ) of coke oven gas reduces on ... plants in India at Talcher (Orissa) and Ramagundam (A.P) employ Kopper-Totzek process of coal gasification

Last Answer : (C) Ash is normally removed as 'fly-ash' in Kopper-Totzek process of coal gasification

The excess air required for the combustion of pulverised coal is of the order of about __________ percent. (A) 5 (B) 15 (C) 30 (D) 45

Description : The excess air required for the combustion of pulverised coal is of the order of about __________ percent. (A) 5 (B) 15 (C) 30 (D) 45

Last Answer : (B) 15

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. (A) 35 (B) 75 (C) 95 (D) 105

Description : Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. (A) 35 (B) 75 (C) 95 (D) 105

Last Answer : (B) 75

Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels. (A) 75 (B) 95 (C) 120 (D) 140

Description : Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels. (A) 75 (B) 95 (C) 120 (D) 140

Last Answer : (B) 95