Module 16 Piston Engine Practice Questions - UK CAA Part-66 AME Module 16 - Piston Engine Exam - Module 16 Piston Engine Practice Questions - UK CAA Part-66 AME Module 16

Question 1

An aircraft piston cylinder has a swept volume (displacement volume) of 90 cubic inches and a clearance volume of 15 cubic inches. What is the compression ratio of this engine?

7:1 6:1 5:1 8:1

Correct Answer:

7:1

Question 2

Calculate the Indicated Horsepower (IHP) of a 4-stroke 6-cylinder engine with a Mean Effective Pressure (P) of 135 psi, piston stroke (L) of 0.375 ft, piston crown area (A) of 19.63 sq in, running at 2,400 RPM (N = 1,200 power strokes per min per cylinder).

270.0 HP 180.0 HP 135.0 HP 405.0 HP

Correct Answer:

180.0 HP

Question 3

An engine produces an Indicated Horsepower (IHP) of 220 HP and loses 33 HP to internal friction and parasitic drag (FHP). What is the Brake Horsepower (BHP) and Mechanical Efficiency of the engine?

BHP = 253 HP, Mechanical Efficiency = 87% BHP = 187 HP, Mechanical Efficiency = 80% BHP = 187 HP, Mechanical Efficiency = 85% BHP = 200 HP, Mechanical Efficiency = 90%

Correct Answer:

BHP = 187 HP, Mechanical Efficiency = 85%

Question 4

In a standard four-stroke Otto cycle engine, during which stroke does ignition take place, and what is the exact position of the crankshaft relative to Top Dead Center (TDC)?

Ignition occurs at exact Top Dead Center (TDC) of the power stroke. Ignition occurs slightly after Top Dead Center (ATDC) at the beginning of the power stroke. Ignition occurs at Bottom Dead Center (BDC) between compression and power strokes. Ignition occurs slightly before Top Dead Center (BTDC) near the end of the compression stroke.

Correct Answer:

Ignition occurs slightly before Top Dead Center (BTDC) near the end of the compression stroke.

Question 5

What is the primary purpose of 'valve overlap' (the period when both intake and exhaust valves are open simultaneously)?

To utilize the inertia of escaping exhaust gases to assist in scavenging the cylinder and drawing in a fresh charge. To allow fuel to leak directly into the exhaust pipe to cool the turbine. To reduce compression ratio during engine start to prevent starter motor overload. To prevent detonation by lowering combustion chamber temperature during high RPM.

Correct Answer:

To utilize the inertia of escaping exhaust gases to assist in scavenging the cylinder and drawing in a fresh charge.

Exam overview

About this Exam

Prepare with the Module 16 Piston Engine Practice Questions - UK CAA Part-66 AME Module 16 - Piston Engine Exam practice quiz. This question bank includes 100 questions covering engine, aircraft, fuel, piston, and cylinder. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Module 16 Piston Engine Practice Questions - UK CAA Part-66 AME Module 16 - Piston Engine Exam

This practice set contains 100 questions from the matching question bank and focuses on engine, aircraft, fuel, piston, and cylinder. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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About this Exam

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Module 16 Piston Engine Practice Questions - UK CAA Part-66 AME Module 16 - Piston Engine Exam

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