FREE AND STUDY GAMES ABOUT RECIP POWERPLANT

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FREE AND STUDY GAMES ABOUT RECIP POWERPLANT

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -107 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Direct mechanical push-pull carburetor heat control linkages should normally be adjusted so that the stop located on the diverter valve will be contacted

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before the stop at the control lever is reached in both HOT and COLD positions.Question 2: Increased water vapor (higher relative humidity) in the incoming air to a reciprocating engine will normally result in which of the following?

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Decreased engine power at a constant RPM and manifold pressure.Question 3: A characteristic of dyna-focal engine mounts as applied to aircraft reciprocating engines is that the

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shock mounts point toward the engine's center of gravity.Question 4: Which of the following will be caused by excessive valve clearance of a cylinder on a reciprocating aircraft engine?

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Reduced valve overlap period.

Question 5: If the ignition switch is moved from BOTH to either LEFT or RIGHT during an engine ground check, normal operation is usually indicated by a slight

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drop in torque meter pressure indication.Question 6: Which of these conditions will cause an engine to have an increased tendency to detonate?

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High manifold pressure or high intake air temperature.Question 7: If an engine cylinder is to be removed, at what position in the cylinder should the piston be?

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Top dead center.Question 8: What special procedure must be followed when adjusting the valves of an engine equipped with a floating cam ring?

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Eliminate cam bearing clearance when making valve adjustment.Question 9: A condition that can occur in radial engines but is unlikely to occur in horizontally opposed engines is

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hydraulic lock.Question 10: Grinding the valves of a reciprocating engine to a feather edge is likely to result in

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preignition and burned valves.Question 11: What could cause excessive pressure buildup in the crankcase of a reciprocating engine?

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Plugged crankcase breather.

Question 12: What is the purpose of the safety circlet installed on some valve stems?

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To prevent valves from falling into the combustion chamber.Question 13: One of the best indicators of reciprocating engine combustion chamber problems is

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spark plug condition.Question 14: On which part of the cylinder walls of a normally operating engine will the greatest amount of wear occur?

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Near the top of the cylinder.

Question 15: Which statement is correct regarding engine crankshafts?

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Moveable counterweights serve to reduce the torsional vibrations in an aircraft reciprocating engine.Question 16: At what speed must a crankshaft turn if each cylinder of a four-stroke cycle engine is to be fired 200 times a minute?

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400 RPM.

Question 17: During overhaul, the disassembled parts of an engine are usually degreased with some form of mineral spirits solvent rather than water-mixed degreasers primarily because

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water-mixed degreaser residues may cause engine oil contamination in the overhauled engine.Question 18: During ground check an engine is found to be rough-running, the magneto drop is normal, and the manifold pressure is higher than normal for any given RPM. The trouble may be caused by

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a dead cylinder.

Question 19: An increase in manifold pressure with a constant RPM will cause the bearing load in an engine to

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increase.

Question 20: Compression ratio is the ratio between the

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cylinder volume with piston at bottom dead center and at top dead center.

Question 21: Which statement pertaining to fuel/air ratios is true?

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The mixture ratio which gives the best power is richer than the mixture ratio which gives maximum economy.

Question 22: What is the purpose of a power check on a reciprocating engine?

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To determine satisfactory performance.Question 23: The floating control thermostat, used on some reciprocating engine installations, helps regulate oil temperature by

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controlling air flow through the oil cooler.Question 24: Valve overlap is defined as the number of degrees of crankshaft travel

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during which both valves are off their seats.Question 25: When will small induction system air leaks have the most noticeable effect on engine operation?

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At low RPM.Question 26: Which of the following will decrease volumetric efficiency in a reciprocating engine?

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Improper valve timing, sharp bends in the induction system, and high carburetor air temperatures.