In a fuel cell driven vehicle, the energy is obtained from the combustion of (A) Methane (B) Hydrogen (C) LPG (D) CNG

In a fuel cell driven vehicle, the energy is obtained from the combustion of (A) Methane (B) Hydrogen (C) LPG (D) CNG
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Answer :

(B) Hydrogen
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Consider the following statements: 1. Detergents do not produce lather with hard water 2. Water gas is a mixture of carbon monoxide and hydrogen 3. Methane is the chief constituent of CNG 4. LPG contains mainly n-butane 5. The correct statements are: (a) 1, 2 and 4 only (b) 1,3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only

Description : Consider the following statements: 1. Detergents do not produce lather with hard water 2. Water gas is a mixture of carbon monoxide and hydrogen 3. Methane is the chief constituent of CNG 4. LPG contains mainly n-butane 5. The correct ... (b) 1,3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only

Last Answer : Ans:(c)

gas is the mixture mainly consisting of carbon monoxide and hydrogen in specially designed apparatus. a) CNG b) LPG c) Biomass d) None of the above

Description : gas is the mixture mainly consisting of carbon monoxide and hydrogen in specially designed apparatus. a) CNG b) LPG c) Biomass d) None of the above

Last Answer : Biomass

Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons (b) permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles (c) use of non-polluting compressed natural gas (CNG) only as fuel by all buses and trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Description : Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and ... trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Last Answer : (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons

Which of the following fuel gases has the highest calorific value? (A) Natural gas (B) Coal bed methane (CBM) (C) Liquefied petroleum gas (LPG) (D) Sewage gas

Description : Which of the following fuel gases has the highest calorific value? (A) Natural gas (B) Coal bed methane (CBM) (C) Liquefied petroleum gas (LPG) (D) Sewage gas

Last Answer : (C) Liquefied petroleum gas (LPG)

Maximum soot is released from (A) Petrol vehicles (B) CNG vehicles (C) Diesel vehicles (D) Thermal Power Plants

Description : Maximum soot is released from (A) Petrol vehicles (B) CNG vehicles (C) Diesel vehicles (D) Thermal Power Plants

Last Answer : (D) Thermal Power Plants

What are the reasons for choosing LPG over CNG?

Description : What are the reasons for choosing LPG over CNG?

Last Answer : CNG which is compressed Natural Gas is made up of methane, compressed to a pressure of 200 to 248 bars while LPG is liquefied Natural Gas made of butane and propane liquefied at 15 degrees Celsius and ... it lighter but LPG has more energy content and the reason it is use for cooking and heating.

______energy source is the largest source used in India. a. CNG b. LPG c. Coal d. Bio Gas

Description : . ______energy source is the largest source used in India. a. CNG b. LPG c. Coal d. Bio Gas

Last Answer : Coal

Compare the following fuels on the basis of calorific value and knocking. LPG, CNG and bio-diesel

Description : Compare the following fuels on the basis of calorific value and knocking. LPG, CNG and bio-diesel 

Last Answer : Parameter LPG CNG Bio-diesel Calorific value 46.4MJ/Kg LPG has consistent & higher calorific value.  52.34 MJ/Kg Which is higher than LPG. 37.27 MJ/Kg this ... 65 which is higher than petro-diesel. So intensity of knocking is less in biodiesel compared to petro diesel.

Pick out the wrong statement. (A) High concentration of oxygen in flue gas means high stack loss (B) Gaseous fuels require the least % excess air for complete combustion (C) The ratio of fixed carbon to volatile matter percentage in coal is called its 'fuel ratio' (D) Calorific value of natural gas is more than that of LPG

Description : Pick out the wrong statement. (A) High concentration of oxygen in flue gas means high stack loss (B) Gaseous fuels require the least % excess air for complete combustion (C) The ratio of fixed carbon to ... coal is called its 'fuel ratio' (D) Calorific value of natural gas is more than that of LPG

Last Answer : (D) Calorific value of natural gas is more than that of LPG

Which of the following gases is produced due to incomplete combustion of fuel? (1) Carbon Dioxide (2) Carbon Monoxide (3) Methane (4) Ethane

Description : Which of the following gases is produced due to incomplete combustion of fuel? (1) Carbon Dioxide (2) Carbon Monoxide (3) Methane (4) Ethane

Last Answer : (2) Carbon Monoxide Explanation: Carbon monoxide (CO) is an odorless, colorless gas formed by the incomplete com bustion of fuels. It is produced from the partial oxidation of carbon-containing com pounds; it forms when there is not enough oxygen to produce carbon dioxide.

Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be (A) 9.5 : 1 (B) 12.5 : 1 (C) 15.5 : 1 (D) 18.5 : 1

Description : Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be (A) 9.5 : 1 (B) 12.5 : 1 (C) 15.5 : 1 (D) 18.5 : 1

Last Answer : (A) 9.5 : 1

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

Description : 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

Last Answer : (B) 17 : 1

Pick out the wrong statement. (A) LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals (B) The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point (C) Each ton of petroleum oil on distillation produces about 30-50 Nm3 of gas (D) Maximum yield of naphthalene is obtained on distillation of crude oil

Description : Pick out the wrong statement. (A) LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals (B) The minimum temperature, at which a petroleum oil vapor catches ... about 30-50 Nm3 of gas (D) Maximum yield of naphthalene is obtained on distillation of crude oil

Last Answer : (B) The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point

Explain combustion chemistry of carbon, methane and hydrogen

Description : Explain combustion chemistry of carbon, methane and hydrogen 

Last Answer : i) Carbon: Burning of carbon to carbon dioxide ( complete combustion )   That means 1 kg of carbon needs 2.67 kg oxygen and produces 3.67 kg of carbon dioxide  ii)Methane (CH4):  ... by the following equitation 1 kg of hydrogen combines with 8 kg of oxygen to produce 9 kg of steam. 

Explain combustion chemistry of carbon, hydrogen and methane.

Description : Explain combustion chemistry of carbon, hydrogen and methane.

Last Answer : Combustion chemistry of carbon, methane and hydrogen: i) Carbon: Burning of carbon to carbon dioxide ( complete combustion )  That means 1 kg of carbon needs 2.67 kg oxygen and produces 3.67 ... equitation 1 kg of hydrogen combines with 8 kg of oxygen to produce 9 kg of steam. 

Which of the following is the best fuel in terms of energy released per gram of fuel? (1) Hydrogen (2) Methane (3) Ethanol (4) Butane

Description : Which of the following is the best fuel in terms of energy released per gram of fuel? (1) Hydrogen (2) Methane (3) Ethanol (4) Butane

Last Answer : (1) Hydrogen Explanation: The amount of energy released increases with the number of bonds present in the chemical substance or fuel. That is because each bond has a certain amount of energy stored in it therefore the more bonds ... KJ/g; Methane: 55.6 KJ/ g; Ethanol: 29.7 KJ /g; Butane: 49.6KJ/g.

Which of the following is the best fuel in terms of energy released per gram of fuel? (1) Hydrogen (2) Methane (3) Ethanol (4) Butane

Description : Which of the following is the best fuel in terms of energy released per gram of fuel? (1) Hydrogen (2) Methane (3) Ethanol (4) Butane

Last Answer : Hydrogen

Expressive communication is driven by (A) Passive aggression (B) Encoder’s personality characteristics (C) External clues (D) Encoder-decoder contract

Description : Expressive communication is driven by (A) Passive aggression (B) Encoder’s personality characteristics (C) External clues (D) Encoder-decoder contract

Last Answer : (B) Encoder’s personality characteristics

Firewalls are used to protect a communication network system against: (A) Unauthorized attacks (B) Virus attacks (C) Data-driven attacks (D) Fire-attacks

Description : Firewalls are used to protect a communication network system against: (A) Unauthorized attacks (B) Virus attacks (C) Data-driven attacks (D) Fire-attacks

Last Answer : Answer: A In computing, a firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a ... outside network, such as the Internet, that is assumed to not be secure or trusted.

What do you understand by the term Dark Fermentation'? (1) It is a method to dispose nu-clear wastes. (2) It is a method to produce methane from organic wastes. (3) It is a method to reduce COD in the atmosphere. (4) It is a method to produce Hydrogen as a fuel from waste water.

Description : What do you understand by the term Dark Fermentation'? (1) It is a method to dispose nu-clear wastes. (2) It is a method to produce methane from organic wastes. (3) It is a method to reduce COD in the atmosphere. (4) It is a method to produce Hydrogen as a fuel from waste water.

Last Answer : (4) It is a method to produce Hydrogen as a fuel from waste water. Explanation: Dark fermentation is the fermentative conversion of organic substrate to bio-hydrogen. It is a complex ... . Wastewater is used as a potential substrate for bio-hydrogen production in the dark fermentation process.

What do you understand by the term ‘Dark Fermentation’? (1) It is a method to dispose nuclear wastes. (2) It is a method to produce methane from organic wastes. (3) It is a method to reduce COD in the atmosphere. (4) It is a method to produce Hydrogen as a fuel from waste water.

Description : What do you understand by the term ‘Dark Fermentation’? (1) It is a method to dispose nuclear wastes. (2) It is a method to produce methane from organic wastes. (3) It is a method to reduce COD in the atmosphere. (4) It is a method to produce Hydrogen as a fuel from waste water.

Last Answer :  It is a method to produce Hydrogen as a fuel from waste water.

CNG is a A. Polluted fuel B. Clean fuel C. Harmful fuel D. None

Description : CNG is a A. Polluted fuel B. Clean fuel C. Harmful fuel D. None

Last Answer : B. Clean fuel

CNG is a A. Polluted fuel B. Clean fuel C. Harmful fuel D. None

Description : CNG is a A. Polluted fuel B. Clean fuel C. Harmful fuel D. None

Last Answer : B. Clean fuel

CNG is a A. Polluted fuel B. Clean fuel C. Harmful fuel D. None

Description : CNG is a A. Polluted fuel B. Clean fuel C. Harmful fuel D. None

Last Answer : B. Clean fuel

CNG is used as alternative fuel, justify with four merits and four demerits.

Description : CNG is used as alternative fuel, justify with four merits and four demerits.

Last Answer : 1. CNG reduces the harmful emission 2. Operating cost of the vehicle running on CNG is lower. 3. Reduced vehicle maintenance. 4. Fuel theft is not possible. Since NG cannot be siphoned ... 5. Inconsistent fuel properties. So above merits and demerits suggest that CNG is used as alternative fuel.

Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain (A) CO (B) CO2 (C) H2O (D) Both (B) & (C)

Description : Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain (A) CO (B) CO2 (C) H2O (D) Both (B) & (C)

Last Answer : (D) Both (B) & (C)

Which one of the following green house gases has the shortest residence time in the atmosphere? (A) Chlorofluorocarbon (B) Carbon dioxide (C) Methane (D) Nitrous oxide

Description : Which one of the following green house gases has the shortest residence time in the atmosphere? (A) Chlorofluorocarbon (B) Carbon dioxide (C) Methane (D) Nitrous oxide

Last Answer : (C) Methane

Which of the following is a source of methane? (A) Wetlands (B) Foam Industry (C) Thermal Power Plants (D) Cement Industry

Description : Which of the following is a source of methane? (A) Wetlands (B) Foam Industry (C) Thermal Power Plants (D) Cement Industry

Last Answer : Answer: A

LPG is a mixture of (a) carbon monoxide and carbon dioxide (b) butane and propane (c) methane and ethylene (d) carbon dioxide and oxygen

Description : LPG is a mixture of (a) carbon monoxide and carbon dioxide (b) butane and propane (c) methane and ethylene (d) carbon dioxide and oxygen

Last Answer : Ans:(b)

Which of the following is the major constituent of LPG? (1) Methane (2) Ethane (3) Propane (4) Butane

Description : Which of the following is the major constituent of LPG? (1) Methane (2) Ethane (3) Propane (4) Butane

Last Answer : (4) Butane Explanation: Butanes are highly flammable, colourless, easily liquefied gases. When blended with propane and other hydrocarbons, it is referred to commercially as LPG, for liquefied petroleum gas.

The major component in the LPG is - (1) methane (2) butane (3) ethane (4) propane

Description : The major component in the LPG is - (1) methane (2) butane (3) ethane (4) propane

Last Answer : (2) butane Explanation: Butanes are highly flammable, colourless, easily liquefied gases. When blended with propane and other hydrocarbons, it is referred to commercially as LPG, for liquified petroleum gas. It is used as a petrol component.

Which hydrocarbons are the major constituents of 'LPG'? (1) Methane and Ethane (2) Propane and Butane (3) Pentane and Benzene (4) Only Methane

Description : Which hydrocarbons are the major constituents of 'LPG'? (1) Methane and Ethane (2) Propane and Butane (3) Pentane and Benzene (4) Only Methane

Last Answer : (2) Propane and Butane Explanation: Cooking gas, also known as Liquefied Petroleum Gas (LPG) is primarily propane (C3Hg) and butane (C4H10).

Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of (A) Propane & butane (B) Butane & ethane (C) Methane & ethane (D) Methane & carbon monoxide

Description : Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of (A) Propane & butane (B) Butane & ethane (C) Methane & ethane (D) Methane & carbon monoxide

Last Answer : (A) Propane & butane

Liquefied Petroleum Gas (LPG) is mainly a mixture of (A) Propane & butane (B) Methane & ethane (C) High boiling olefins (D) High boiling naphthenes

Description : Liquefied Petroleum Gas (LPG) is mainly a mixture of (A) Propane & butane (B) Methane & ethane (C) High boiling olefins (D) High boiling naphthenes

Last Answer : (A) Propane & butane

LPG (Household cooking gas) is mainly a mixture of (a) Methane + Ethane (b) Acetylene + O2 (c) Butane + Isobutane (d) Acetylene + H2

Description : LPG (Household cooking gas) is mainly a mixture of (a) Methane + Ethane (b) Acetylene + O2 (c) Butane + Isobutane (d) Acetylene + H2

Last Answer : Butane + Isobutane

Which of the following is the major constituent of LPG? (1) Methane (2) Ethane (3) Propane (4) Butane

Description : Which of the following is the major constituent of LPG? (1) Methane (2) Ethane (3) Propane (4) Butane

Last Answer : Butane

The major component in the LPG is (1) methane (2) butane (3) ethane (4) propane

Description : The major component in the LPG is (1) methane (2) butane (3) ethane (4) propane

Last Answer : butane

Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ? (1) Methane (2) Ethane (3) Propane (4) Butane

Description : Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ? (1) Methane (2) Ethane (3) Propane (4) Butane

Last Answer : Butane

Which of the following constituents of a fuel does not contribute to its calorific value on combustion? (A) Hydrogen (B) Sulphur (C) Carbon (D) None of these

Description : Which of the following constituents of a fuel does not contribute to its calorific value on combustion? (A) Hydrogen (B) Sulphur (C) Carbon (D) None of these

Last Answer : (D) None of these

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that (A) Pure oxygen has been used for combustion (B) Nitrogen percentage in the fuel is very high (C) Excess air has been used for combustion (D) Hydrogen is not present in the fuel

Description : Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that (A) Pure oxygen has been used for combustion ... very high (C) Excess air has been used for combustion (D) Hydrogen is not present in the fuel

Last Answer : (C) Excess air has been used for combustion

Which among the following has the highest flue gas loss on combustion due to Hydrogen in the fuel? a) natural gas b) furnace oil c) coal d) light diesel oil

Description : Which among the following has the highest flue gas loss on combustion due to Hydrogen in the fuel? a) natural gas b) furnace oil c) coal d) light diesel oil

Last Answer : a) natural gas

Air/gas ratio for complete combustion will be the highest for (A) LPG (B) Gobar gas (C) Coke oven gas

Description : Air/gas ratio for complete combustion will be the highest for (A) LPG (B) Gobar gas (C) Coke oven gas

Last Answer : (A) LPG

An emergency generator, driven by an internal combustion engine, shall be tested under load for a minimum of 2 hours at least once every _____________. A. week B. 2 weeks C. month D. 3 months

Description : An emergency generator, driven by an internal combustion engine, shall be tested under load for a minimum of 2 hours at least once every _____________. A. week B. 2 weeks C. month D. 3 months

Last Answer : Answer: C

Pick out the wrong statement. (A) Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust (B) NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light (C) Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees (D) H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2

Description : Pick out the wrong statement. (A) Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust (B) NO2 is capable of penetrating the troposphere and ... at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2

Last Answer : (D) H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2

For process boilers , combustion air fans must meet the following requirements ___ a. The fan motor shall be driven by a variable speed drive b. The fan motor shall include controls that limit the fan motor demand to no more than 30 %. c. Both a. & b. d. None of the above

Description : For process boilers , combustion air fans must meet the following requirements ___ a. The fan motor shall be driven by a variable speed drive b. The fan motor shall include controls that limit the fan motor demand to no more than 30 %. c. Both a. & b. d. None of the above

Last Answer : c. Both a. & b.

The way technology is advancing, the computer driven car is becoming more of a reality.My question when an accident does happen, will we be able to blame the vehicle, and not the driver?

Description : The way technology is advancing, the computer driven car is becoming more of a reality.My question when an accident does happen, will we be able to blame the vehicle, and not the driver?

Last Answer : And accidents will happen, maybe far less, but they will happen, so who will be at fault if we take the human out of the picture?

What vehicle/s that you've never driven would you love to, given the oppurtunity?

Description : What vehicle/s that you've never driven would you love to, given the oppurtunity?

Last Answer : Anything faster than my Pontiac, because there are too many to list.

What is the fastest you have ever driven in a vehicle?

Description : What is the fastest you have ever driven in a vehicle?

Last Answer : 150mph. Porsche 911. German autobahn. Mid afternoon. By get caught do you mean seen by the police in which case yes I overtook several cops and waved politely each time. If you mean get in ... will arrest you for dangerous driving at any speed but if you're driving safely they leave you alone.

What was the best vehicle you've ever driven?

Description : What kind of supercar have you ever driven?

Last Answer : Since I don't have the right to do so, I'm only trabant in my lap: DD

What is a palindrome for what is a fast vehicle driven around a track?

Description : What is a palindrome for what is a fast vehicle driven around a track?

Last Answer : race car