rec

All lubrication systems use

Constant displacement

Additional cooling fins are sometimes provided on which part?

Pistons

Which type of oil filter requires that it be cut open and visually inspected?

Spin-on type

_______ is the measure of oils resistance to flow

Viscosity

List the two designs of thermocouples used to monitor cylinders

Bayonet, gasket

which position should the cowl flaps be in the engine?

During ground runup

SAE 80 is equivalent to ______

40W

What is considered a downside of air cooling a recip engine

Increase drag

What percent of the heat energy of the burning fuel is converted into energy in a recip engine?

30%

The two types of recip engine oil filter systems are

Full flow, bypass

List the two types of constant displacement pumps used in recip lubrication systems

The gear, generator pump

A system installed on some recip engines to aid in introducing fuel into the system prior to shutdown is called

Oil dilution

Movable doors used to control airflow across the engine are

Cowl flaps

At what event are oil coolers normally removed and thoroughly inspected?

Engine overhaul

Which type of oil is used for break-in after cylinder overhauled

Straight mineral oil

What are the classifications of recip engine lubrication

Dry sump, wet sump

Which type of cooling system provides cooling airflow

fan

SAE 100 is equivalent to?

50W

When is a wet vacuum pump is used on an engine

as oil circulates through this type of pump

When a crack is discovered on a cylinder head fin, what should should be done to prevent further cracking?

What is the most accurate way to identify the type and quality in engine oil by sending a sample to a laboratory for analysis?

Send sample to lab for SOAP

Ribs projecting from the surface of a component to increase its area to exchange heat into the airstream flowing over it

Cooling fins

A cowling used on radial engine aircraft designed to improve airflow and engine cooling

Townend ring

In the combustion sections of a liquid cooled recip engine

the surrounding passageways for coolant is referred to as a ____________

Radial engine cowling that encloses the engine and provides for pressure cooling

NACA Cowling

End of a thermocouple where a small current is generated when combined with a reference junction

Hot junction

To aid in uniform cooling

these sheet metal air deflectors are installed between and around air-cooled cylinders

A heat exchanger used to maintain normal operating temperatures of lubricating oil

Oil cooler

The measure of a fluids change in viscosity due to changes in temperature

Viscosity index

Popular mineral oil used as a lubricant for recip engines which does not contain any metallic ash-forming ingredients and has additives that keep contaminants dispersed throughout the oil

Ashless- dispersant oil

A unit of measure for expressing the viscosity of a fluid

Centistokes

Increased drag is considered a disadvantage of air cooling a recip engine

True

Engine cooling in a helicopter recip engine is accomplished by the use of ______

cooling fan shroud

When oil heats up in an engine

the thermostatic bypass valve allows the oil to flow _______

Used to increase airflow through the cylinders

this system creates a low pressure area at the lower rear of the cowling that increases the airflow through the cylinder cooling fins

Small pipe or duct that channels air from the main cooling airstream onto heat-sensitive components and accessories that are typically built into the baffle structure

Blast tubes

The valve that determines which of the two possible paths the oil will take through a cooler is known as the

Flow control valve

Extreme pressure lubricant formulated to provide protection under high loads

Hypoid lubricants

Synthesized extracts of a mineral

vegetable