Bissoy.com
Doctors Medicines MCQs Q&A

Related Questions

In order to burn a fuel completely, which of the following basic conditions must be fulfilled? 1. Supply enough air for complete combustion of fuel. 2. Secure low turbulence for thorough mixing of fuel and air. 3. Maintain a furnace temperature high enough to ignite the incoming fuel air mixture. 4. Provide a furnace volume large enough to allow time for combustion to be completed. Select the correct answer using the code given below:
Which of the following are essential for a good combustion chamber of turbojet engine? 1. It should allow complete combustion of fuel. 2. It should maintain sufficiently high temperature in the zone of combustion in addition to proper atomization of fuel thus leading to continuous combustion. 3. It should not have high rate of combustion. 4. The pressure drop should be as small as possible
Consider the following statements with regard to IC engines: 1. For best fuel economy of spark ignition engines, the fuel-air mixture should be lean 2. With supercharging, the specific consumption in compression ignition engines increases 3. With increase of load, knocking tendency in compression ignition engines increases Which of the above statements are correct?
Consider the following statements regarding homogeneous mixture. Identify the correct ones. A homogeneous mixture is a liquid, gaseous & solid mixture that has similar proportions throughout its components.  Salt and pepper form is a pure example of a homogeneous mixture.
Which one of the statement is correct?
1. Petrol engine is a reciprocating engine
2. Petrol engine is high speed engine
3. Petrol engine uses petrol as fuel
4. Petrol engine is internal combustion engine
If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
Compared to a Homogeneous Charge Compression Ignition (HCCI) engine, the fuel injections pressure in case of Gasoline Direct Injection Compression Ignition (GDCI) engine is about
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:
In a spark ignition engine combustion which is initiated between the spark plug electrodes spreads across the combustible mixture.
In a SI engine, combustion stage I takes 1 ms and combustion stage II takes 1.5 ms when the engine runs at 1000 rpm. If stage I time duration is independent of engine speed what will be the additional spark advance necessary when the engine speed is doubled?