Day 33 Sheet

Cooling: What is the effect of antifreeze on the sizing of radiators?

• The ability to transfer heat diminishes when water is mixed with ethylene glycol. The loss in ambient capability due to antifreeze is about 1°C (1.8 °F)  for each 10% glycol, up to 50 %.

Detonation: What is detonation?

• Premature combustion inside engine: a premature spontaneous burning of a fuel-air mixture inside an internal-combustion engine; uncontrolled burning of the gas in the engine.

Contamination: How, besides the recommended maintenance intervals, could oil change intervals be determined?

• Fixed method (mileage/hrs)
• Duty cycle method (operating conditions)

Combustion air flow requirements: "Combustion air flow requirements will vary, depending on the specific engine model and rating. Specific air flow data for CAT engines is given in both volumetric [m to the 3rd power/min (cfm)] and mass [kg/hr (lb/hr)] flow terms, at standard reference conditions.

  And something I learned this week:
Stoichiometry ( stoy-kee-ah-muh-tree)- Refers to the relative quantities of elements in a molecule or the relative amounts of reactions and products in a chemical reaction. Used in regard to the amounts of fuel and air involved in the chemical reaction that is combustion. Stoichiometry combustion takes place when the fuel and air are in the correct proportions so that there is no oxygen or fuel remaining when combustion is finished.