Bissoy.com
Doctors Medicines MCQs Q&A

Related Questions

In a diesel engine
1. Fuel injection pump is used
2. Fuel injection pump and carburettor is used
3. Fuel injector is used
4. Neither fuel injection pump nor injector is used
Study the following table:   June 2007 December 2014 Price of petrol in Rs/litre 47.74 61.33 Price of diesel in Rs/litre 35.21 50.51   After studying the above table, Devmeet a class V student wrote the following in his notebook: A. Petrol is more expensive fuel than diesel. B. The percentage increase in the price of diesel is more than that of petrol. C. Diesel is cheaper and that is why public transport runs on it. D. Diesel is cheaper fuel than petrol. People should buy diesel vehicles. Which one of the following is correct?
A solid-oxide fuel cell is fed with carbon monoxide and reacts with air to produce CO2. This reaction will produce 2 electrons which are used to power an electric circuit external to the fuel cell. The reaction equation is shown below: 2CO(g) + O2(g) -> 2CO2(g) ΔHr° = -565.96 kJ/mol This reaction does not occur for other types of fuel cells which use a catalyst, such as polymerelectrolyte membrane or phosphoric-acid fuel cells. The presence of carbon monoxide on the anode side of these types of fuel cells will cause catalyst poisoning, reducing the efficiency and voltage of the fuel cell. Determine the rate of enthalpy change for a carbon dioxide production rate of 208 mol/hr. The extent of the reaction occurring in the fuel cell can be obtained by the following equation: where:
Statement (I): Air-blast injection in diesel engines could reduce engine efficiency. Statement (II): Air-blast injection in diesel engine is not instantaneous but happens when the piston moves outward with the injection valve remaining open for whatever reason.
With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements: 1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products. 2. Fuel cells can be used for powering buildings and not for small devices like laptop computers. 3. Fuel cells produce electricity in the form of Alternating Current (AC) Which of the statements given above is/are correct?
With reference to 'fuel cells' in which hydrogen rich fuel and oxygen are used to generate electricity. Consider the following statements.
1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by products.
2. Fuel cells can be used for powering buildings and not for small devices like laptop, computers.
3. Fuel cells produce electricity in the form of Alternating Current (AC).
Which of the statements given above is/are correct?
Consider the following statements with reference to fuel cells: 1. In fuel cells, hydrogen-rich fuel and oxygen are used to generate electricity. 2. Fuel cells produce electricity in the form of direct current (DC). 3. Hydrogen fuel cells are more energy-efficient compared to diesel engines. Which of the statements given above is/are correct?
A certain truck uses 18 gallons of diesel fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck's fuel mileage be increased.
Which of the following actions will help to reduce the black smoke emission of a diesel engine? 1. Run at lower load, i.e. derating 2. Have regular maintenance of the diesel engine, particularly of injection system 3. Use diesel oil of higher cetane number Select the correct answer using the code given below.
Once a study was conducted about the impact of inflation on the prices of petrol and diesel. It has been observed during recent survey that the price of diesel increases by 40 paise every year. Apart from that it is been also observed that the price of petrol also increases by 15 paise every year. If in 2016, the price of petrol was Rs. 65.30 and that of diesel was Rs. 53.70, after how many years will diesel cost 40 paise more than the petrol?