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You Are On Multi Choice Question Bank SET 1448

72401. In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then __________ is employed.

72402. The advancing of spark timing in spark ignition engines will __________ knocking tendency.

72403. The knocking in spark ignition engines can be reduced by

72404. An atom bomb utilises uncontrolled nuclear fission.

72405. The ratio of the brake power to the indicated power is called

72406. The increase of efficiency of a compression ignition engine, as the load decreases, is due to

72407. A turbo-jet does not require a turbine to drive the compressor.

72408. For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.

72409. The compression ratio in petrol engines is kept low as compared to diesel engines because higher compression ratio in petrol engines would lead to pre-ignition of fuel.

72410. The cetane (C16H34) which is a straight chain paraffin is assigned a cetane number of

72411. Morse test is used to determine the I.P. of a

72412. A moderator

72413. In a four stroke cycle diesel engine, the exhaust valve

72414. The two stroke cycle engines have lighter flywheel.

72415. The thermodynamic cycle on which the petrol engine works, is

72416. The inlet valve of a four stroke cycle internal combustion engine remains open for

72417. The correct mixture strength (by weight) for petrol is about

72418. The working pressure and temperature inside the cylinder of an internal combustion engine is __________ as compared to a steam engine.

72419. The scavenging efficiency of a four stroke cycle diesel engine is

72420. The voltage required to produce a spark across the gap, between the sparking points is

72421. The control rods in the control system of nuclear reactors are used to

72422. If the speed of the engine is increased, the indicated power will

72423. The petrol engines are also known as __________ engines.

72424. The specific fuel consumption per B.P. hour for a petrol engine is about

72425. The material most commonly used for sheilding is

72426. In order to eliminate knocking in compression ignition engines, there should be

72427. In a petrol engine, the charge is ignited with the help of a spark plug.

72428. Reflector in nuclear power plants __________ neutron leakage.

72429. Number of working strokes per min. for a two stroke cycle engine are __________ the speed of the engine in r.p.m.

72430. The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to

72431. A two stroke cycle engine occupies larger floor area than a four stroke cycle engine.

72432. The indicated mean effective pressure of an engine is obtained from the indicator diagram drawn with the help of an engine indicator.

72433. A fuel of cetane number 40 has the same ignition quality as a mixture of

72434. The two reference fuels used for cetane rating are

72435. In petrol engines, the delay period is of the order of

72436. The reflectivity of a reflector is defined as the fraction of neutrons entering the reflector which are returned to the core.

72437. In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

72438. A diesel engine is __________ as compared to petrol engine, both running at rated load.

72439. Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine ?

72440. The pressure at the end of compression, in petrol engines, is approximately

72441. The sparking in a petrol engine increases pressure and temperature of the products of combustion, but the volume remains constant.

72442. Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of

72443. Which of the following movements truly reflected the spirit of Hindu -Muslim unity?

72444. The turbine of the turbo-prop engine is __________ that of the turbo-jet engine.

72445. A higher compression ratio causes

72446. Who has the longest term as the speaker of Kerala Legislative Assembly?

72447. The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is

72448. The engines in which the combustion of fuel takes place inside the engine cylinder are called internal combustion engines.

72449. A fuel will detonate less if it has higher self ignition temperature.

72450. The combustion in compression ignition engines is

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