Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.
Description : A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol
Last Answer : Answer: a Explanation: None.
Description : The two reference fuel used for cetane rating are (a) Cetane and iso octane (b) Cetane and tetra ethyl lead (c) Cetance and n-heptane (d) Cetane and α- methyl naphthalene
Last Answer : Ans : d
Description : Presence of aromatics in (A) Diesel increases its cetane number (B) Kerosene increases its smoke point (C) Petrol increases its octane number (D) All (A), (B) and (C)
Last Answer : (C) Petrol increases its octane number
Description : Visbreaking process is used mainly for making (A) High cetane diesel (B) High octane gasoline (C) Fuel oil (D) Smoke free kerosene
Last Answer : (C) Fuel oil
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
Description : Write the properties of diesel as a fuel in CI engine.
Last Answer : 1) Volatility: - The fuel should be sufficiently volatile in the operating range of temperature to produce good mixing and combustion. 2) Viscosity: Viscosity of a fuel is a measure of its resistance to flow. ... the temperature of unit mass of a diesel through 1°c. It is about 1.9 KJ/Kg°c.
Description : Compare detonation and diesel knock on the basis of (i) Fuel Ignition Temperature (ii) Compression Ratio (iii) Speed (iv) inlet temperature (v) inlet pressure (vi) cylinder wall temperature (vii) cylinder size
Last Answer : Comparison between detonation and diesel knock: Parameter To avoid Detonation in SI Engine To avoid Diesel knock i) Fuel Ignition Temperature High Low ii) Compression Ratio ... Cylinder wall temperature Low High viii) Cylinder size Small Large
Description : Ignition quality of petrol is expressed by a. Octane number b. cetane number c. calorific value d. self-ignition temperature
Last Answer : ANSWER a. Octane number
Description : A mixture containing 65% of iso-octane and 35% of normal heptane will have a) cetane number 65 b) octane number 65 c) cetane number 35 d) octane number 35
Last Answer : Answer: b Explanation: A mixture containing 65% of iso-octane and 35% of normal heptane will have octane number 65 as octane number is the number percentage containing iso-octane.
Description : A fuel of cetane number 40 has the same ignition quality as a mixture of a) 40% cetane and 60% alpha methyl naphthalene b) 40% alpha methyl naphthalene and 60% cetane c) 40% petrol and 60% diesel d) 40% diesel and 60% petrol
Last Answer : Answer: a Explanation: A fuel of cetane number 40 has the same ignition quality as a mixture of 40% cetane and 60% alpha methyl naphthalene as cetane number is counted on cetane percentage.
Description : 'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and (A) Petrol (B) LPG (C) Light hydrocarbon gases (e.g. butane or propane) (D) None of these
Last Answer : (A) Petrol
Description : Draw a layout of fuel injection system in CRDI diesel engine. State its fundamental requirement.
Last Answer : Fundamental requirement:-The line diagram of CRDI shows that the system is controlled by ECU. The sensors in the system are used to feed the input in the ECU.ECU will provide the signal ... fuel injector, common rail, High pressure fuel pump, ECM/ECU, Pressure sensor, Rail pressure limiter.
Description : Draw block diagram for EDC type fuel pump in diesel engine.
Last Answer : Block diagram for EDC type fuel pump in diesel engine OR
Description : Describe air fuel- ratio requirements for diesel engines at no load to full load.
Last Answer : Irrespective of load at any given speed, an approximately constant supply of air enters the cylinder. With change in load, the quantity of fuel injected is changed varying the air fuel ratio. The ... engine always designed to operate with an excess air of 15 to 40% depending upon the application
Description : The quality of petrol is expressed in terms of – (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds
Last Answer : (3) Octane number Explanation: Octane rating or octane number is a standard measure of the of the ignition quality of has (gasoline or petrol). Higher this number, the less ... premature burning in the combustioncharnber) when burnt in a standard (spark-ignition internal combustion) engine.
Description : The quality of petrol is expressed in terms of (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds
Last Answer : Octane number
Description : Ignition quality of diesel is expressed by a. octane number b. cetane number c. calorific value d. carbon content
Last Answer : ANSWER b. cetane number
Description : What is the quality rating for diesel fuel, similar to the octane number for petrol?
Last Answer : Catane number
Description : Octane number of gasoline is obtained by comparing the performance of the engine when running on a mixture of the following hydrocarbons A. ethane and methane B. normal heptane and iso-octane C. iso-heptane and octane D. iso-octane and TEL
Last Answer : ANSWER : B
Description : Which of the following alkanes will have the highest boiling point? (a) n-Octane (b) Isopentane (c) n-Butane (d) Neopentane
Last Answer : n-Octane
Description : Major constituent of natural gas is a) ethane b) methane c) butane d) propane
Last Answer : Answer: b Explanation: Only methane is the major constituent of natural gas.
Description : The main constituents of biogas are (a) methane and hydrogen (b) carbon monoxide and carbon dioxide (c) butane, propane and nitrogen (d) carbon dioxide and methane
Last Answer : Ans:(d)
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)
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.
Description : Which of the following gas is used in cigarette lighters? (1) Butane (2) Propane (3) Methane (4) Ethane
Last Answer : (1) Butane Explanation: Butane, a highly flammable, colorless, easily liquefied gas used in gas-type lighters and butane torches. Naphtha, a volatile flammable liquid hydrocarbon mixture used in wick-type lighters and burners.
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.
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).
Description : The main Constituent of natural gas is (1) Methane (2) Ethane (3) Butane (4) Propane
Last Answer : (1) Methane Explanation: Natural has is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, with other hydrocarbons, carbon dioxide, nitrogen and hydrogen sulfide. It is ... methane clathrates. Petroleum is also another resource found in proximity to and with natural gas.
Description : Indane gas is a mixture of which gases? (1) butane and hydrogen (2) butane and propane (3) butane and oxygen (4) methane and oxygen
Last Answer : (2) butane and propane
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
Description : In gobar gas, the maximum amount is that of (a) butane (b) methane (c) propane (d) carbon dioxide.
Last Answer : b) methane
Description : Which is the HEAVIEST of the following molecules: w) butane x) ethane y) methane z) propane
Last Answer : ANSWER: W -- BUTANE
Last Answer : Butane
Description : The major component in the LPG is (1) methane (2) butane (3) ethane (4) propane
Last Answer : butane
Description : The main constituent of natural gas is (1) Methane (2) Ethane (3) Butane (4) Propane
Last Answer : Methane
Description : Cokking gas is a mixture of (1) methane and ethylene (2) carbon dioxide and oxygen (3) butane and propane (4) carbon monoxide and carbon dioxide
Last Answer : butane and propane
Description : Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ? (1) Methane (2) Ethane (3) Propane (4) Butane
Description : In catalytic alkylation, higher iso-butane to olefin ratio gives (A) Low final boiling point product (B) Higher yield (C) Both (A) and (B) (D) Neither (A) nor (B
Last Answer : (A) Low final boiling point product
Description : How do the boiling points of butane, propane, and ethane compare? (a) the boiling point of ethane is greatest. b) the boiling point of butane is greatest. (c) the boiling point of propane is greatest. (d) there is no relationship among these three alkanes and their boiling points
Last Answer : the boiling point of butane is greatest.
Description : What is diesel smoke? State two methods to control diesel smoke.
Last Answer : Diesel smoke: Smoke is defined as visible products of combustion, is due to poor combustion. It originates early in the combustion. Rich fuel-air mixture & at pressures developed in diesel ... manifold. This shortens the delay period- curbs thermal cracking which is responsible for soot format
Description : List and Explain two type of diesel smoke. Explain four cause of diesel smoke.
Last Answer : Answer: Two type of diesel smoke 1) Blue-white smoke 2) Black smoke Four cause of diesel smoke:- 1) Blue smoke is due to burning the droplets of lubricating oil in combustion ... because of worn piston rings & cylinder liners & water come in combustion chamber because cracked water jacket.
Description : With the help of neat sketch, describe block diagram of Electronic Diesel Control Unit (EDC).
Last Answer : EDC: The ECU determines the correct quantity of the fuel to be injected based on the inputs and the data in the look up table. The fuel input depends on the rack position and thus ECU ... ECU can also protect the engine against overheating by regulating the maximum quantity of fuel delivered.
Description : List down the pollutants from gasoline engine and diesel engine.
Last Answer : Pollutants from gasoline engine:- 1. Hydrocarbons. 2. Carbon Monoxide. 3. Carbon dioxide. 4. Oxides of Nitrogen. Pollutants from diesel engine:- 1. Hydrocarbons 2. Carbon Monoxide. 3. Carbon dioxide. 4. Oxides of Nitrogen. 5. Particulate matters.
Description : State the difference between turbocharger & VGT used in diesel engine.
Last Answer : Difference between turbocharger and VGT Sr. No. Parameter Turbocharger VGT 1 Fuel efficiency Lower fuel efficiency as compared to VGT Improved fuel efficiency by20% 2 ... required. 6 Engine response Sluggish response at low speeds Quick responsive engine
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.
Description : Explain the working of diesel engine glow plugs with neat sketch
Last Answer : Glow plug is an aid for cold starting of a C.I. engine. The self-ignition temperature of diesel is 250°C. For compression ignition, the charge (air + diesel) should reach a temperature of ... plugs is automatically interrupted. But starting may be attempted again as soon as the driver wishes.
Description : What is diesel knock? How it is controlled?
Last Answer : Diesel knock The knock phenomenon of C.I. engine depends upon delay period. If delay period is small then less amount of fuel is admitted into cylinder during ignition delay period. As it burns ... by multiple injections so that only small amount of fuel is injected at first (pilot injection).
Description : What are the causes of diesel smoke?
Last Answer : Cause of diesel smoke:- 1) Blue smoke is due to burning the droplets of lubricating oil in combustion chamber because of worn piston rings & cylinder liners. 2) White smoke is due to ... of worn piston rings & cylinder liners & water come in combustion chamber because cracked water jacket.
Description : Describe the working of electronically controlled diesel injection pump.
Last Answer : Answer: Electronically controlled diesel injection pump: This is similar to conventional pumps, but its injection is controlled by Electronic Control Unit (ECU) which control solenoid valve in the injection pump ... modifies the current to the solenoid valve, to supply fuel as per requirement.