Test on Aircraft Reciprocating Engine Systems
Aircraft Reciprocating Engine Systems: A Student's Guide
Test: Aircraft Engine Maintenance
20 questions
Question 1: The primary reason for using multiple springs for valve closing is to accelerate the valve's opening sequence.
A. Ano
B. Ne
Explanation: Using more than one spring for valve closing is primarily to eliminate vibrations or surging at certain speeds, to dampen spring surge vibrations, and to reduce the danger of weakness and possible failure by breakage due to heat and metal fatigue, not to accelerate the valve's opening sequence.
Question 2: Striking an object is a cause of engine sudden stoppage.
A. Ano
B. Ne
Explanation: Engine sudden stoppage is caused by striking an object or engine seizure due to internal damage.
Question 3: The primary function of metallic sodium in hollow valve stems is to increase the structural strength of the valve.
A. Ano
B. Ne
Explanation: Sodium is used in hollow valve stems because it is an excellent heat conductor, which enables it to carry heat from the valve head to the stem for dissipation, thereby helping with cooling. Its primary function is not to increase structural strength.
Question 4: Is a dial indicator gage used to make a runout check on a crankshaft that is still installed in the engine?
A. Ano
B. Ne
Explanation: To make a runout check on a crankshaft installed in an engine, a dial indicator gage is attached to the front of the crankcase, and its needle is adjusted to touch the shaft. The engine is then turned through with the starter, and any changes in the gage reading are noted.
Question 5: Engine seizure due to internal damage prevents an engine from stopping suddenly.
A. Ano
B. Ne
Explanation: Engine seizure due to internal damage is a cause of engine sudden stoppage, not something that prevents it.