Test on Reciprocating Aircraft Engine Fundamentals

Question 1: The provided study materials describe how to locate a cold cylinder on a double row radial engine by checking for valve blow-by.

A. Ano

B. Ne

Explanation: The study materials ask 'How can a cold cylinder be located on a double row radial engine?' but do not provide any information or method for locating a cold cylinder. Valve blow-by is mentioned as an indication of a faulty cylinder, but not as a method to locate a cold cylinder on a radial engine.

Question 2: According to the study materials, what is the correct procedure for removing hydraulic lock from an aircraft engine?

A. Remove a spark plug from the locked cylinder and drain all the oil out.

B. Turn the engine through with the starter and note changes in a dial indicator gage reading.

C. Add more oil to the engine to create sufficient pressure to clear the lock.

D. Check the propeller drive shaft for misalignment.

Explanation: To remove hydraulic lock from an aircraft engine, you should remove a spark plug from the locked cylinder and drain all the oil out.

Question 3: Valve clearance is adjusted on radial engines.

A. Ano

B. Ne

Explanation: Valve clearance is adjusted on radial engines because they have solid lifters.

Question 4: Sealing rings are one of the different types of piston rings used in reciprocating engines.

A. Ano

B. Ne

Explanation: The study materials list the different types of piston rings as compression rings, oil control rings, and scraper rings.

Question 5: In a horizontally opposed reciprocating engine, what is the speed of the camshaft relative to the crankshaft speed?

A. The camshaft turns at the same speed as the crankshaft.

B. The camshaft turns at twice the crankshaft speed.

C. The camshaft turns at one half of the crankshaft speed.

D. The camshaft turns at one fourth of the crankshaft speed.

Explanation: The study materials state that the camshaft turns at one half of the crankshaft speed in a horizontally opposed engine.