RECIPROCATING ENGINE OPERATION, MAINTENANCE, INSPECTION, AND OVERHAUL (1-53)
Reciprocating Engine Mastery Quiz
Test your knowledge and expertise in reciprocating engine operation, maintenance, inspection, and overhaul with our comprehensive quiz. Designed for aviation enthusiasts and professionals, this quiz covers a wide range of topics to assess and enhance your understanding of engine mechanics.
Features:
- 51 challenging multiple-choice questions
- Focus on practical knowledge and best practices
- Ideal for students, technicians, and aviation professionals
A condition that can occur in radial engines but is unlikely to occur in horizontally opposed engines is
Valve overlap.
Zero valve clearance.
Hydraulic lock.
If the intake valve is opened too early in the cycle of operation of a four-stroke cycle engine, it may result in
Improper scavenging of exhaust gases.
Engine kickback.
Backfiring into the induction system.
On which part of the cylinder walls of a normally oper- ating engine will the greatest amount of wear occur?
Near the center of the cylinder where piston velocity is greatest.
Near the top of the cylinder.
Wear is normally evenly distributed.
During overhaul, reciprocating engine exhaust valves are checked for stretch
With a suitable inside spring caliper.
With a contour or radius gauge.
By placing the valve on a surface plate and mea- suring its length with a vernier height gauge.
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
Solvent degreasers are much more effective.
Water-mixed degreaser residues may cause engine oil contamination in the overhauled engine.
Water-mixed degreasers cause corrosion.
(1) Cast iron piston rings may be used in chrome- plated cylinders.
(2) Chrome-plated rings may be used in plain steel cylinders.
Regarding the above statements,
Only No. 1 is true.,
2 neither No. 1 nor No.2 is true.
2 both No. 1 and No.2 are true.
When cleaning aluminum and magnesium engine parts, it is inadvisable to soak them in solutions containing soap because
Some of the soap will become impregnated in the surface of the material and subsequently cause engine oil contamination and foaming.
The soap can chemically alter the metals causing them to become more susceptible to corrosion.
The parts can be destroyed by dissimilar metal electrolytic action if they are placed together in the solution for more than a few minutes.
What is the purpose of a power check on a reciprocating engine?
To check magneto drop.
To determine satisfactory performance.
To determine if the fuel/air mixture is adequate.
Which of the following will be caused by excessive valve clearance of a cylinder on a reciprocating aircraft engine?
Reduced valve overlap period.
Intake and exhaust valves will open early and close late.
A power increase by shortening the exhaust event.
Which of the following would indicate a general weak- engine condition when operated with a fixed-pitch pro- peller or test club?
Lower than normal static RPM, full throttle operation.
Manifold pressure lower at idle RPM than at sta- tic RPM.
Lower than normal manifold pressure for any given RPM.
What is required by 14 CFR Part 43 appendix D when performing an annual/100-hour inspection on a reciprocating engine aircraft?
Magneto timing check.
Cylinder compression check.
Valve clearance check.
After spark plugs from an opposed engine have been serviced, in what position should they be reinstalled?
Next in firing order to the one from which they were removed.
Swapped bottom to top.
Next in firing order to the one from which they were removed and swapped bottom to top.
As the pressure is applied during a reciprocating engine compression check using a differential pressure tester, what would a movement of the propeller in the direction of engine rotation indicate?
The piston was on compression stroke.
The piston was on exhaust stroke.
The piston was positioned past top dead center.
Excessive valve clearance results in the valves opening
Late and closing early.
Early and closing late.
Late and closing late.
During routine inspection of a reciprocating engine, a deposit of small, bright, metallic particles which do not cling to the magnetic drain plug is discovered in the oil sump and on the surface of the oil filter. This condition
May be a result of abnormal plain type bearing wear and is cause for further investigation.
Is probably a result of ring and cylinder wall wear and is cause for engine removal and/or overhaul.
Is normal in engines utilizing plain type bearings and aluminum pistons and is not cause for alarm.
A characteristic of dyna-focal engine mounts as applied to aircraft reciprocating engines is that the
Shock mounts eliminate the torsional flexing of the powerplant.
Engine attaches to the shock mounts at the engine's center of gravity.
Shock mounts point toward the engine's center of gravity.
If metallic particles are found in the oil filter during an inspection,
It is an indication of normal engine wear unless the particles are nonferrous.
The cause should be identified and corrected: before the aircraft is released for flight.
It is an indication of normal engine wear unless the deposit exceeds a specified amount.
If the oil pressure gauge fluctuates over a wide range from zero to normal operating pressure, the most likely cause is.
Low oil supply.
Broken or weak pressure relief valve spring.
Air lock in the scavenge pump intake.
Which of the following is most likely to occur if an overhead valve engine is operated with inadequate valve clearances?
The valve will not seat positively during start and engine warmup.
The further decrease in valve clearance that occurs as engine temperatures increase will cause damage to the valve-operating mechanism.
The valves will remain closed for longer periods than specified by the engine manufacturer.
Excessive valve clearances will cause the duration of valve opening to
Increase for both intake and exhaust valves.
Decrease for both intake and exhaust valves.
Decrease for intake valves and increase for exhaust valves.
Engine crankshaft runout is usually checked 1. During engine overhaul. 2. During annual inspection. 3. After a "prop strike" or sudden engine stoppage. 4. during 100-hour inspection.
1,3, and 4.
1 and 3.
1,2, and 3.
Before attempting to start a radial engine that has been shut down for more than 30 minutes,
Turn the propeller by hand three or four revolu- tions in the opposite direction of normal rotation to check for liquid lock.
Turn the ignition switch on before energizing the starter.
Turn the propeller by hand three to four revolutions in the normal direction of rotation to check for liquid lock.
An engine misses in both the right and left positions of the magneto switch. The quickest method for locating the trouble is to
Check for one or more cold cylinders.
Check each spark plug.
Perform a compression check.
A hissing sound from the exhaust stacks when the pro- peller is being pulled through manually indicates
A cracked exhaust stack.
Exhaust valve blow-by.
Worn piston rings.
If an engine cylinder is to be removed, at what position in the cylinder should the piston be?
Bottom dead center.
Top dead center.
Halfway between top and bottom dead center.
Engine operating flexibility is the ability of the engine to
Deliver maximum horsepower at a specific altitude.
Meet exacting requirements of efficiency and low weight per horsepower ratio.
Run smoothly and give the desired performance at all speeds.
Standard aircraft cylinder oversizes usually range from 0.010 inch to 0.030 inch. Oversize on automobile engine cylinders may range up to 0.100 inch. This is because aircraft engine cylinders
Have more limited cooling capacity.
Have relatively thin walls and may be nitrided.
Operate at high temperatures.
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
Several spark plugs fouled on different cylinders.
A leak in the intake manifold.
A dead cylinder.
What is the best indication of worn valve guides?
High oil consumption.
Low compression.
Low oil pressure.
Direct mechanical push-pull carburetor heat control linkages should normally be adjusted so that the stop located on the diverter valve will be contacted
Before the stop at the control lever is reached in both HOT and COLD positions.
Before the stop at the control lever is reached in the HOT position and after the stop at the control lever is reached in the COLD position.
After the stop at the control lever is reached in both HOT and COLD positions.
Which of the following engine servicing operations generally requires engine pre-oiling prior to starting the engine?
Engine oil and filter change.
Engine installation.
Replacement of oil lines.
During the inspection of an engine control system in which push-pull control rods are used, the threaded rod ends should
Not be adjusted in length for rigging purposes because the rod ends have been properly posi- tioned and staked during manufacture.
Be checked for thread engagement of at least two threads but not more than four threads.
Be checked for the amount of thread engagement by means of the inspection holes.
Which of the following would most likely cause a reciprocating engine to backfire through the induction system at low RPM operation?
Idle mixture too rich.
Clogged derichment valve.
Lean mixture.
How may it be determined that a reciprocating engine with a dry sump is pre-oiled sufficiently?
The engine oil pressure gauge will indicate normal oil pressure.
Oil will flow from the engine return line or indicator port.
When the quantity of oil specified by the manu- facturer has been pumped into the engine.
Backfiring through the carburetor generally results from the use of
An excessively lean mixture.
Excessively atomized fuel.
An excessively rich mixture.
If air is heard coming from the crankcase breather or oil filler during a differential compression check, what is this an indication of?
Exhaust valve leakage.
Intake valve leakage.
Piston ring leakage.
One cause of afterfiring in an aircraft engine is
Sticking intake valves.
An excessively lean mixture.
An excessively rich mixture.
Standard sea level pressure is
29.00" Hg.
29.29" Hg.
29.92" Hg.
Using standard atmospheric conditions, the standard sea level temperature is
59 F.
59 C.
29 C.
Newton's First Law of Motion, generally termed the Law of Inertia, states
To every action there is an equal and opposite reaction.
Force is proportional to the product of mass and acceleration.
Every body persists in its state of rest, or of motion in a straight line, unless acted upon by some outside force.
(Refer to figure 1) Determine which portion of the AD is applicable for Model 0-690 series engine, serial No.5863-40 with 283 hours time in service.
This is the compliance portion of an FAA Airworthiness Directive. >
Compliance required as indicated:
(A) For model O-690 series engines, serial Nos. 101-40 through 5264-40 and IO-690
series engines, serial Nos. 101-48 through 423-48, compliance with (C) required within 25 hours' time in service after the effective date of this AD and every 100 hours' time in service thereafter.
(B) For model O-690 series engines, serial Nos. 5265-40 through 6129-40 and IO-690 series engines, serial Nos. 424-48 through 551-48, compliance with (C) required as follows: ,
(1) Within 25 hours' time in service after the effective date of this AD and every 100
hours' time in service thereafter for engines with more than 275 hours' time in service on the effective date of this AD.
(2) Prior to the accumulation of 300 hours total time in service and every 100 hours'
time in service thereafter for engines with 275 hours or less time in service on the
effective date of this AD.
(C) Inspect the oil pump drive shaft (P/N 67512) on applicable engines in accordance
with instructions contained in Connin Service Bulletin No. 295. Any shafts which are
found to be damaged shall be replaced before further flight. These inspections shall
be continued until Connin P/N 67512 (redesigned) or P/N 74641 oil pump drive shaft
is installed at which time the inspections may be discontinued.
(B),(l).
(A).
(B),(2).
A Cessna 180 aircraft has a McCauley propeller Model No.2A34C50/90A. The propeller is severely damaged in a ground accident, and this model propeller is not available for replacement. Which of the following should be used to find an approved alternate replacement?
Summary of Supplemental Type Certificates.
Aircraft Specifications/Type Certificate Data Sheets.
Aircraft Engine and Propeller Specifications/ Type Certificate Data Sheets.
(1) Airworthiness Directives are Federal Aviation Regulations and must be complied with unless specific exemption is granted.
(2) Airworthiness Directives of an emergency nature require immediate compliance upon receipt.
Regarding the above statements,
Only No. 1 is true.
Only No. 2 is true.
Both No. 1 and No. 2 arc true.
Which of the following contains a minimum checklist for 100-hour inspections of engines?
14 CFR Part 33, Appendix A.
14 CFR Part 43, Appendix D.
Engine Specifications or Type Certificate Data Sheets.
Which of the following contains a table that lists the engines to which a given propeller is adaptable?
Aircraft Type Certificate Data Sheets.
Propeller Type Certificate Data Sheets
Engine Type Certificate Data Sheets.
Which of the following component inspections is to be accomplished on a 100-hour inspection?
Check internal timing of magneto.
Check cylinder compression.
Check valve timing.
Where would one find type design information for an Rl830-92 engine certificated under the Civil Air Regulations (CAR) and installed on a DC-3?
The Aircraft Specifications and Type Certificate Datasheet.
The Aircraft Engine Specifications.
The Aircraft Engine Type Certificate Handbook.
The breaking loose of small pieces of metal from coated surfaces, usually caused by defective plating or excessive loads, is called
Flaking.
Chafing.
Brinelling.
Each powerplant installed on an airplane with a Standard Airworthiness Certificate must have been
Type certificated.
Manufactured under the TSO system.
Originally certificated for that aircraft.
A severe condition of chafing or fretting in which a transfer of metal from one part to another occurs is called
Scoring.
Burning.
Galling.
Indentations on bearing races caused by high static loads are known as
Fretting.
Brinelling.
Galling.
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