Question

How many dead centres are there in one cycle of a steam engine?
A. 4
B. 3
C. 2
D. 1

Answer 1

Hint: To know how much type of dead centres in one cycle of steam engine, we have to9 go through the whole concept of dead centres of the steam engine. Dead centre is of top and bottom type dead centres.

Complete answer:
There are two dead centres in one cycle of steam engine: Top dead centre and Bottom dead centre.
Top dead centre:- Top Dead Centre is a terminology commonly used in the context of internal combustion engines and it is generally abbreviated as “TDC”. Inside the engine chamber, Top Dead Centre is the farthest situation of the cylinder (top of the chamber) where the cylinder changes to the descending stroke.

Inside an Internal combustion engine, the cylinder moves in the top and base development and forces up the driving rod to give rotational development in the wheels. At the point when the cylinder arrives at the top most situation inside the chamber where its upward development simply stops and converts into descending development, that position is call Top Dead Centre. Now, the cylinder won't move the upward way any longer.

Bottom dead centre:- Similarly as TDC; also, when the cylinder moves the descending way or in the downward direction, it compasses to a point where it won't further move the descending way. Now, its descending development is changed over once more into upward development. This position is called Bottom Dead Centre or BDC.

Bottom dead centre is the point at which the piston of an engine is nearest to the axis of the crankshaft. On a vertical engine, this is the absolute bottom that the cylinder comes to. At the point when the cylinder arrives at base perfectly focused, it begins to move upwards. During the pressure stroke, the cylinder climbs from base perfectly focused.

Hence, the correct option is C.

Note:The movement of piston from Top Dead Centre (TDC) to Bottom Dead Centre (BDC) is called “One Stroke”. To give a rotational development, the cylinder makes a limitless number of strokes inside the motor chamber.