Question

Which of the following will decrease volumetric efficiency in a reciprocating engine? 1. Full throttle operation. 2. Low cylinder head temperatures. 3. Improper valve timing. 4. Sharp bends in the induction system. 5. High carburetor air temperatures.

Answer 1

options 3,4,5 are the currect options

Step-by-step explanation:

Volumetric efficiency in a reciprocating engine is defined as the ratio of the mass density of the air-fuel mixture drawn into the cylinder at atmospheric pressure (during the intake stroke) to the mass density of the same volume of air in the intake manifold.

Volumetric efficiency of a reciprocating engine is decreased by

- improper valve timing

-sharp bends in the induction system

- high carburetor air temperature.