85701. Which of the following does not relate to a spark ignition engine ?
85702. The increase in intake temperature of internal combustion engines will __________ efficiency.
85703. The reflectivity depends upon
85704. The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.
85705. In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
85706. The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.
85707. The mechanical efficiency (ηm) of the engine is given by
85708. A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is
85709. A supercharger receives air from the atmosphere surrounding the engine, compresses it to a higher pressure and then feeds it into the inlet valve of the engine.
85710. Iso-octane (C8H18) has octane number of
85711. The brake power is always greater than indicated power.
85712. An ignition coil in the spark ignition engines supplies __________ voltage to the spark plug.
85713. The operation of forcing additional air under pressure into the engine cylinder is known as
85714. The cylinder of a gas engine is made __________ than that of the petrol engine.
85715. The thermal efficiency of a petrol engine is __________ as compared to diesel engine.
85716. The compression ignition engines are governed by
85717. The delay period in oil engines increases with increase in the speed of engine.
85718. The specific fuel consumption per B.P. hour for a diesel engine is about
85719. The ignition quality of diesel oil is expressed by
85720. In a four stroke cycle petrol engine, the expansion
85721. A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
85722. A two stroke cycle engine gives __________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
85723. By higher octane number of spark ignition fuel, it is meant that the fuel has
85724. The spark ignition engines are governed by
85725. If petrol is used in a diesel engine, then
85726. The sensing element in the control system of nuclear reactors measure the __________ of the neutron flux in the reactor.
85727. If the temperature of intake air in internal combustion engine increases, then its efficiency will
85728. In a coil ignition system of petrol engines, a condenser is connected across the contact-breaker in order to
85729. Which of the following statement is correct regarding normal cetaine?
85730. Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
85731. As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
85732. The __________ engines can work on very lean mixture of fuel.
85733. The ignition quality of petrol is expressed by
85734. The fuel valve in a four stroke cycle diesel engine
85735. In petrol engines, advancing of the spark timing will __________ the knocking tendency.
85736. The knocking tendency in compression ignition engines for a given fuel will be
85737. In a four stroke cycle engine, the sequence of operations is
85738. Diesel as compared to petrol is
85739. The first nuclear power plant in India was located at
85740. The probability of knocking in diesel engines is increased by
85741. A diesel engine, during suction stroke, draws
85742. Anti-knock for compression ignition engines is
85743. In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as
85744. In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
85745. Supercharging is the process of supplying the intake air to the engine cylinder at a density __________ the density of the surrounding atmosphere.
85746. The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of
85747. In a four stroke cycle petrol engine, , the compression
85748. Reflector in nuclear power plants is used to reflect neutrons back into the active core.
85749. During idling, a petrol engine requires __________ mixture.
85750. In natural uranium, the constituents of three naturally occuring isotopes are
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