FREE AVIATION AND STUDY GAMES ABOUT BLOCK 15

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FREE AVIATION AND STUDY GAMES ABOUT BLOCK 15

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -57 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Where are cooling fins usually located on air-cooled engines?

Answer:

Cylinder head, cylinder barrel, and inside the piston.Question 2: Cylinder head temperatures are measured by means of an indicator and a

Answer:

thermocouple sensing device.Question 3: Which of the following lubrication systems utilizes an external oil tank?

Answer:

Dry sump tank Question 4: The measure of the change in viscosity of oil with a given change in temperature range is

Answer:

Viscosity index

Question 5: Which class of lubrication system would have an integral means of storing the oil used in the engine .

Answer:

Wet sump system Question 6: The temperature at which an oil's wax content, normally held in solution , begins to solidify and separate into tiny crystals .

Answer:

Cloud point Question 7: During ground operation of an engine, the cowl flaps should be in what position?

Answer:

Fully open.Question 8: How do cowl flaps aid in cooling a horizontally opposed aircraft engine?

Answer:

Controls the amount of air flowing around the cylinders.Question 9: Increased engine heat will cause volumetric efficiency to:

Answer:

Decrease.Question 10: In general a lubricating oil system must have a tank with a capacity how much greater than the system oil demand ?

Answer:

10% Question 11: The three criteria for selecting a suitable oil take into account high operating temperature, high bearing and what ?

Answer:

Large clearance

Question 12: Stochiometric Mixtures

Answer:

15:1. The perfect mixture for combustion of fuel

Question 13: Which type of oil is especially not recommended for use in aircraft reciprocating engines during the break in period?

Answer:

Synthetic oils

Question 14: The richer the mixture?

Answer:

Loss of power and serious overheating Question 15: Which of the following assists in removing heat from the metal walls and fins of an air-cooled cylinder assembly?

Answer:

baffle and cowl arrangement.Question 16: The Saybolt Universal Viscosimeter is used to establish the designation numbers for which scale?

Answer:

Commercial grades

Question 17: Which of the following is not a function of engine lubricating oil

Answer:

Inflate Question 18: Which component in an oil lubrication system is used to aid in accelerating the warming up of engine oil

Answer:

Tank hopper Question 19: What is the device that controls the volume of the fuel/air mixture to the cylinders?

Answer:

Throttle valve

Question 20: Which of the following uses the wet sump as it's sources of oil?

Answer:

Splash Method

Question 21: A bent cooling fin on an aluminum cylinder head

Answer:

should be left alone if no crack has formed.

Question 22: A broken cooling fin on a cylinder head

Answer:

may be filed to smooth contours if damage and/or repair limits are not exceeded.Question 23: What is the purpose of an augmenter used in some reciprocating engine exhaust systems?

Answer:

To aid in cooling the engine.

Question 24: What is a Venturi used for?

Answer:

It is used in the throat of the carburetor to measure the air flow.

Question 25: Best power mixture

Answer:

Mixture ratio 0.080 Question 26: What effect would the application of carburetor heat have on a fuel/air mixture during operation .

Answer:

The mixture will become richer Question 27: Which of these is not an advantage to using the pressure lubrication method?

Answer:

Pump back suction mitigation Question 28: The point at which a liquid will begin to give off ignitable Vapors is known as what?

Answer:

Flash point