aircraft system M4

Question 1

is responsible in cooling the engine, reduce friction in the movable parts of
the engine, cleans, provide seals or coating to the internal engine parts.

Answer 1

oil system

Question 2

THE ENGINE OIL SYSTEM PERFORMS SEVERAL

IMPORTANT FUNCTIONS:

Answer 2

• Lubrication of the engine’s moving parts
• Cooling of the engine by reducing friction
• Removing heat from the cylinders
• Carrying away contaminants

Question 3

two types of oil system

Answer 3

wet sump, dry sump

Question 4

There are two lubrication systems in common use, these are the __ Sump and __
Sump systems.

Answer 4

wet, dry

Question 5

The system used is normally dependant on the_____ of the

engine, and role of the aircraft.

Answer 5

power output

Question 6

THE WET AND DRY SUMP LUBRICATING SYSTEMS

The principle of lubrication of the engine is the same
whichever system is used, the principle difference between the two systems being the
method used to store the supply of oil.

Question 7

Most light, non-aerobatic aircraft engines use the ________ system. In this system the
oil is stored in the bottom or sump of the engine

Answer 7

wet sump

Question 8

THE WET AND DRY SUMP LUBRICATING SYSTEMS
This simplifies construction but has
number of disadvantages:

Answer 8

✓Lubrication difficulties arise during manueuvers.
✓The temperature of the oil is more difficult to control as it is stored within the hot
engine casing.
✓The oil becomes contaminated and oxidizes more easily because of the continual contact
of the oil with hot engine.
✓The oil supply is limited by the sump capacity.

Question 9

The system that overcomes the above problems by storing the oil in a remotely
mounted “Tank”.

Answer 9

dry system

Question 10

It circulates the oil through the engine, and so lubricates the moving
parts.

Answer 10

pressure pump

Question 11

In a dry sump system, _______then return the oil to the tank to prevent the
engine sumps floodin

Answer 11

Scavenge Pumps

Question 12

OIL SYSTEM BASIC COMPONENTS

Answer 12

Oil Sump
• Oil Strainer
• Oil Pumps
• Oil Filter
• Oil Cooler
• Oil Pressure Indicator
• Oil Temperature Indicator

Question 13

It is a bowl-shaped reservoir. It stores the engine oil and then
circulates it within the engine

Answer 13

oil sump

Question 14

It sits below the crankcase and stores the engine oil when the engine is not running. It is located at the bottom of the engine in order to collect and store the engine oil. v

Answer 14

oil sump

Question 15

use in checking the oil levels during pre-flight inspection

Answer 15

oil dipstick

Question 16

Integrated part of the oil sump, It prevents any solid contaminants from entering the oil
system.

Answer 16

oil strainer

Question 17

is a device which helps to circulate the lubricant oil to all the moving parts
inside the engine.

Answer 17

oil pump

Question 18

It supplies the oil to oil filter which filters and sends it
onward. The oil then reaches different moving parts of the engine through oil galleries.

Answer 18

oil pump

Question 19

SOME OF THE ENGINE PARTS WHERE OIL FLOWS

FOR LUBRICATION AND COOLING

Answer 19

• Crankshaft main bearings
• Big end bearings
• Piston pins and small end bushes
• Cylinder walls
• Piston rings
• Timing Gears
• Camshaft and bearings
• Valves
• Tappets and push-rods
• Oil pump parts

Question 20

In order to get better performance and longer engine life, it is essential that the engine oil
quickly reaches the moving parts of the engine. For this purpose, manufacturers provide ____________ within the engine.

Answer 20

oil galleries

Question 21

It is nothing but series of interconnected passages which supply the oil to the remotest parts of the engine

Answer 21

oil galleries

Question 22

It consist of big and small passages drilled inside the cylinder block. The bigger
passages connect to the smaller passages and supply the engine oil up to the cylinder head and overhead camshafts. It also supply the oil to the crankshaft, crankshaft bearings and camshaft bearings thru holes drilled in them as well as to valve lifters/tappets.

Answer 22

oil galleries

Question 23

screens the contaminants that may have pass the oil strainer preventing them to farther enter the oil system.

Answer 23

oil filter

Question 24

allows heat exchange between the oil and the engine.

Answer 24

oil cooler

Question 25

Its function is to tell the pilot that the oil pressure is within operating limits, ensuring the engine is getting the lubrication it needs. Most of it are purely mechanical and do not require electricity to operate.

Answer 25

oil pressure gauges

Question 26

_________ or Indicator is located in the rear instrument panel in the
cockpit. It receives its data electrically from a sensor located on the engine in
front of the oil filter. This indicates the oil temperature in the engine.

Answer 26

Oil Temperature Gauge