PowerPlant Reciprocating Engines Part 1
Exam UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
Backfiring through the carburetor generally results from the use of
A. An excessively lean mixture.
B. Excessively atomized fuel.
C. An excessively rich mixture - correct answer c
The primary concern in establishing the firing order for an opposed engine is to
A. Provide for balance and eliminate vibration to the greatest extent possible.
B. Keep power impulses on adjacent cylinders as far apart as possible in order to obtain the
greatest mechanical efficiency.
C. Keep the power impulses on adjacent cylinders as close as possible in order to obtain the
greatest mechanical efficiency. - correct answer a
Which of the following will decrease volumetric efficiency in a reciprocating engine?
1. Full throttle operation.
2. Low cylinder head temperatures.
3. Improper valve timing.
4. Sharp bends in the induction system.
5. High carburetor air temperatures. - correct answer 345
When does valve overlap occur in the operation of an aircraft reciprocating engine?
A. At the end of the exhaust stroke and the beginning of the intake stroke.
B. At the end of the power stroke and the beginning of the exhaust store.
C. At the end of the compression stroke and the beginning of the power stroke. - correct
answer a
Exam UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
Backfiring through the carburetor generally results from the use of
A. An excessively lean mixture.
B. Excessively atomized fuel.
C. An excessively rich mixture - correct answer c
The primary concern in establishing the firing order for an opposed engine is to
A. Provide for balance and eliminate vibration to the greatest extent possible.
B. Keep power impulses on adjacent cylinders as far apart as possible in order to obtain the
greatest mechanical efficiency.
C. Keep the power impulses on adjacent cylinders as close as possible in order to obtain the
greatest mechanical efficiency. - correct answer a
Which of the following will decrease volumetric efficiency in a reciprocating engine?
1. Full throttle operation.
2. Low cylinder head temperatures.
3. Improper valve timing.
4. Sharp bends in the induction system.
5. High carburetor air temperatures. - correct answer 345
When does valve overlap occur in the operation of an aircraft reciprocating engine?
A. At the end of the exhaust stroke and the beginning of the intake stroke.
B. At the end of the power stroke and the beginning of the exhaust store.
C. At the end of the compression stroke and the beginning of the power stroke. - correct
answer a
