Related Questions

Carburettor in a spark ignition engine is used to
A Mix air-fuel in the desired ratio
B Maintain a constant speed at varying loads
C Adjust the stroke length
D Increase the compression ratio
He knows A e to repair theB carburettor taking C the whole car apart D
A A
B B
C C
D D
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be
A Higher
B Lower
C Remain unaffected
D None of the above
The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the
A Jet area is automatically varied depending on the suction
B The flow from the main jet is diverted to the compensating jet with increase in speed
C The diameter of the jet is constant and the discharge coefficient is invariant
D Flow is produced due to the static head in the float chamber
The advantage of the fuel injection system over the carburettor system is
A Improved fuel efficiency
B Improved emission
C Improved power output
D All of these
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a
A D-slide valve
B governor
C Meyer’s expansion valve
D flywheel
A power supply which has voltage regulation of ___________ is unregulated power supply
A 0%
B 5%
C 10%
D 8%
Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply?
A Mechanical rectifiers
B Copper oxide rectifiers
C Selenium rectifiers
D Electrolytic rectifiers
Which of the following is used for regulated electric supply ?
A Zener diode
B Junction diode
C Gun diode
D Tunnel diode
The unicellular algae used to supply and regulate the oxygen in space programmes is
A Spyrogyra
B Chlorella
C Ulothrix
D Odogonium

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