Reciprocating Engine Concepts

The video tutorial explains reciprocating engines, focusing on key parameters like bore, stroke, and volume calculations. It covers concepts such as top dead center (TDC) and bottom dead center (BDC), and introduces the compression ratio. The tutorial also discusses mean effective pressure and distinguishes between Otto and Diesel engine cycles.

What is the primary movement of the piston in a reciprocating engine?

• Diagonal

• Circular

• Up and down

• Side to side

In a reciprocating engine, what is the term used for the diameter of the cylinder?

• Stroke

• Bore

• Radius

• Circumference

What does BDC stand for in engine terminology?

• Bottom Dead Center

• Base Drive Control

• Bottom Drive Circuit

• Basic Data Chart

How is the displaced volume in an engine calculated?

• Pi over four times the bore times the stroke

• Pi times the bore squared

• Bore times stroke

• Bore divided by stroke

What is the compression ratio in an engine?

• The ratio of bore to stroke

• The ratio of volume at BDC to volume at TDC

• The ratio of clearance volume to displaced volume

• The ratio of engine speed to power output

What is the clearance volume in an engine?

• The volume at BDC

• The volume left when the piston is at TDC

• The volume of the entire cylinder

• The volume swept by the piston

What is the mean effective pressure in an engine?

• The pressure at BDC

• The average pressure that produces the same work output

• The pressure at TDC

• The maximum pressure during combustion

How does a higher mean effective pressure affect engine performance?

• It reduces fuel consumption

• It generally indicates better performance

• It increases engine noise

• It decreases engine efficiency

Which engine model is associated with spark ignition?

• Otto cycle

• Brayton cycle

• Rankine cycle

• Diesel cycle

Which cycle is used to model a compression ignition engine?

• Otto cycle

• Diesel cycle

• Brayton cycle

• Carnot cycle