Engines

Question 1

The oil level being too low will cause what?

Answer 1

Abnormally high engine oil temperature indication.

Question 2

What will excessively high engine temperatures cause?

Answer 2

Loss of power, excessive oil consumption, and possible permanent internal engine damage.

Question 3

For internal cooling, air cooled engines are dependent on what?

Answer 3

The circulation of lubricating oil.

Question 4

If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may have been operating with what?

Answer 4

Too much power and with the mixture set too lean.

Question 5

What can a pilot do to aid in cooling an engine that is overheating during a climb?

Answer 5

Reduce rate of climb and increase airspeed.

Question 6

What is one procedure to aid in cooling an engine that is overheating?

Answer 6

Enrich the fuel mixture.

Question 7

How is engine operation controlled on an engine with a constant speed propeller?

Answer 7

The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM.

Question 8

What is a precaution for the operation of an engine equipped with a constant speed propeller?

Answer 8

Avoid high manifold pressure settings with low RPM.

Question 9

What is an advantage of a constant speed propeller?

Answer 9

Permits the pilot to select the blade angle for the most efficient performance.

Question 10

What is one purpose of the dual ignition system on an aircraft engine?

Answer 10

Improved engine performance.

Question 11

If the ignition switch ground wire becomes disconnected what may happen?

Answer 11

The magneto may continue to fire.

Question 12

Float type carburetor systems compared to fuel injection systems are..

Answer 12

..more susceptible to icing.

Question 13

Which condition is most favorable to the development of carburetor icing?

Answer 13

Temperature between 20 and 70 degrees F and high humidity.

Question 14

The possibility of carburetor icing exists even when ambient air is how high?

Answer 14

As high as 70 degrees F and the relative humidity is high.

Question 15

If an aircraft is equipped with a fixed pitch propeller and a float type carburetor, the first indication of carburetor ice would be what?

Answer 15

Decrease of RPM.

Question 16

What is the operating principle of float type carburetors based on?

Answer 16

The difference in air pressure at the venturi throat and the air inlet.

Question 17

The presence of carburetor ice in an aircraft equipped with a fixed pitch propeller can be verified by applying carburetor heat and noticing what?

Answer 17

A decrease in RPM and then a gradual increase in RPM.

Question 18

What does the use of carburetor heat do?

Answer 18

Decrease engine performance.

Question 19

Applying carburetor heat will do what?

Answer 19

Enrich the fuel/air mixture.

Question 20

What change occurs in the fuel/air mixture when carburetor heat is applied?

Answer 20

The fuel/air mixture becomes richer.

Question 21

During the run up t a high elevation airport, a pilot notes a slightly engine roughness that is not affected by the magneto check bur grows worse during the carburetor heat check. under these circumstances, what would be the most logical initial action?

Answer 21

Check the results with a leaner setting of the mixture.

Question 22

What is the basic purpose of adjusting the fuel/air mixture at altitude?

Answer 22

To decrease the fuel blow in order to compensate for decreased air density.

Question 23

While cruising at 10,000 feet MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 ft MSL is made without readjusting the mixture?

Answer 23

The fuel/air mixture may become too lean.

Question 24

What is fuel/air ratio?

Answer 24

the weight of fuel and weight of air entering the cylinder.

Question 25

When does detonation occur in a reciprocating aircraft engine?

Answer 25

The unburned charge in the cylinders explores instead of burning normally.

Question 26

IF a pilot suspects that the engine (with a fixed pitch propeller) is detonating during climb out after takeoff, what should the pilot do?

Answer 26

Lower the nose slightly to increase airspeed.

Question 27

If the grade of fuel used in an aircraft engine is lower than specified for the engine, what will it cause?

Answer 27

Detonation.

Question 28

What is pre-ignition?

Answer 28

The uncontrolled firing of the fuel/air charge in advance of normal spark ignition.

Question 29

If the recommended octane is not available what type of fuel can be substituted?

Answer 29

The dexter higher octane aviation gas.

Question 30

Filling the fuel tanks after the last flight of the day does what?

Answer 30

Prevents moisture condensation by eliminating airspace in the tanks.

Question 31

To purge water from the fuel system of an aircraft with fuel tank sumps and a fuel strainer quick drain, where do you drain fuel from?

Answer 31

The fuel strainer drain and the fuel tank sumps.

Question 32

On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used?

Answer 32

In the event engine driven fuel pump fails.

Question 33

Which would most likely cause the cylinder head temperature and engine oil temperature gauges to exceed their normal operating ranges?

Answer 33

Using fuel that has a lower than specified fuel rating.

Question 34

What should be the first action after starting an aircraft engine?

Answer 34

Adjust for proper RPM and check for desired indications on the engine gauges.

Question 35

When handstarting airplane engines who should be at controls?

Answer 35

A competent pilot should be at the controls in the cockpit.

Question 36

During preflight in cold weather, crankcase breather lines should receive special attention because they can become clogged by what?

Answer 36

Ice from crankcase vapors that have condensed and frozen.