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DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...

Beams And it's Types

BEAM:-  It is a structural member which can take load at right angle.


CLASSIFICATION OF BEAM -
1. CANTILEVER BEAM:- In this type of beam one end is fixed and other end is free.


2. SIMPLY SUPPORTED BEAM:- In this beam Both end rest freely on support.
The load is on both end.



3. OVERHANGING BEAM:- In this beam support are not at the end and both end of beam extended over the support.





4.PROPPED CANTILEVER BEAM :- In this beam one end is fixed and other end  is provided with support to resist deflection.
This beam is also called restrained beam.



5. FIXED BEAM :- In this beam Both end is rigidly fixed.



6. CONTINUOUS BEAM :-  This beam have more than one support is called continuous beam.



TYPES OF END SUPPORT IN BEAM :- 

1. FREE SUPPORT:- When the beam rest freely in support is called free support.



2. FIXED BEAM:- When the beam is fixed in position as well as in direction and the support does not allow rotation of beam.

 Example:- Garter in home for roof.


3. Hinged support:- In this beam is not fixed and beam can rotate about its axis.

Example:- Door hinges

4. Roller Support:- It is the support in which beam is free to move or roll in horizontal direction.






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DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...
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