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54 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What component equalizes the loads between different engine generators that are parrallel |
The constant speed drive |
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(418)All of the options listed below are proper troubleshooting practices except: A. Checking the applicable trouble areas B. Understanding the function of each engine component C. Inspecting other areas after isolating trouble between points D. Performing easy checks, then going to more difficult checks. |
C. Inspecting other areas after isolating trouble between points. |
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(419)To become and expert troubleshooter, you must: A. Be a 7-level B. Have at least 5 year's experience C. Attend courses in troubleshooting techniques D. Understand the function of each component within each system |
D. Understand the function of each component within each system. |
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(421)On an F-108 engine, during which engine operation can the anti-inflammatory valve be manually locked? A. Full thrust B. Reverse thrust C. Shutdown or idling D. Maintenance power setting |
C. Shutdown or idling. |
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(422)The inlet duct used on multiengine subsonic aircraft (like the C-5 or C-17) has a diameter the gradually: A. Increases from the front to the back B. Decreases from the front to the back C. Increases from the back to the front D. Decreases from the back to the front |
A. Increases from the front to the back. |
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(424)On an F108-CF-100 engine, the direction of the variable bleed valve rotation is controlled by the: A. Engine B. Fuel pump C. Compressor D. Fuel gear motor |
D. Fuel gear motor. |
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Up to what rpm is the N1 and B2 speed indicator capable of measuring engine rotor speed? |
70,000 rpm |
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(436)within how many revolutions per minute is the accuracy of the test cell low and high pressure compressor speed indicator? A. 1 B. 2 C. 3 D. 4 |
B. 2 |
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(437)what type of vibration causes unnecessary engine removals and unwarranted repairs? A. Forced B. Transient C. Unbalanced D. Externally excited |
D. Externally excited |
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(437)during vibration analysis, frequency is usually measured in: A. Phase lags B. Cycles per second C. Phase per second D. Revolutions per minute |
B. Cycles per second |
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(438)Which type of vibration transducer is made up of certain ceramic compounds and natural crystals? A. Velocity B. Phase accelerometer C. Displacement accelerometer D. Piezoelectric accelerometer |
D. Piezoelectric accelerometer |
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(439)the filter selector switch on the vibration analyzer: A. Provides an exact revolutions per minute indication B. Indicates the amplitude of the overall vibration C. Displays the frequency of the overall engine D. Allows selection of the necessary filter to remove the natural vibration frequencies of a specific engine |
Dm allows selection of the necessary filter to remove the natural vibration frequencies of a specific engine. |
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(440)What supports the fan and low-pressure turbine of a jet engine? A. Bushing B. Brackets C. Bearings D. Blades |
C. Bearings |
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(450)The noise suppressor on a portable test cell is not equipped with: A. A fuel trailer B. An exhaust muffler C. Two intake mufflers D. A water tank semitrailer |
D. A fuel trailer |
This is a pt1 question |
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(459)Where is a compressor blade most likely to fail? A. At the leading edge B. Near the blade root C. At the trailing edge D. Near the blade tip |
B. Near the blade root |
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(460)Turbine rotor blade failure usually occurs near what part of the blade? A. Platform B. Middle C. Root D. Tip |
B. Middle |
This is a pt1 question |
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(008)Which base supply function manages the repair cycle system? A. Depot level repair system B. Repair cycle support system C. Standard base supply system D. Precious metals recovery system |
B. Repair cycle support system |
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(013)Within how many hours must category 1 deficiency reports be forwarded to the originating point? A. 8 B. 12 C. 24 D. 72 |
C. 24 |
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(014) which type of items must be reflected on the custodian authorization/ Custody Receipt listing? A. Shelf life B. Bench stock C. Hazardous materials D. Equipment authorization inventory data |
D. Equipment authorization inventory data |
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(014)when should new equipment account custodians receive training? A. Before signing for the account B. Within 10 days of signing for the account C. Within 15 day of signing for the account D. Within 30 days of signing for the account. |
A. Before signing for the account |
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What are two classifications of failures? |
Potential and functional |
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(021)what are the two classifications of failures in the reliability centered maintenance approach? A. Evident and hidden B. Potential and evident C. Hidden and functional D. Potential and functional |
D. Potential and functional |
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(022)which program integrated hardware, software, maintenance, and diagnostic processes to quantify and monitor/manage engine health? A. Centralized repair facility B. Engine trending and diagnostics C. Engine life-cycle management planning D. Comprehensive engine management system |
B. Engine trending and diagnostics |
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(022)the primary goal of the engine trending and diagnostics program is to prevent or limit damage to turbine engines by A. Reviewing past engine accident investigation reports B. Tracking serially controlled components and modules C. Early detection of performance degradation and/or failures D. Documenting engine over speed and over temperature conditions |
C. Early detection of performance degradation and/or failures |
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Where is the diameter of a bolt measured? |
By it's grip |
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What is the most common shipping container for components? |
The cardboard box |
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What is the highest range for each of the 5 maintenance platforms? |
C1-4feet, b1-3-10feet, b2-13-20feet, b4-3-7feet, b5-7-12feet |
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In a multistage turbine, what is the arrangement of the shafts? |
One shaft is hollow, allowing the other shaft to operate inside of it |
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How does engine design help to prevent igniter plug fouling? |
By directing air around the igniter to blow off the carbon deposits |
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Name the three types of turbines |
Impulse, reaction, reaction-impulse |
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What may occur if you alter the exhaust duct? |
You will change the performance of the engine and the exhaust tempurature |
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How do you protect bearings during periods of storage? |
Store them in a clean, dry, and cool area. |
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(208)Vane-type fuel pumps used in jet engines are similar to: A. Sliding-vane air compressors B. Piston pump air compressors C. Roots air compressors D. Turbo-superchargers |
A. Sliding-vane air compressors |
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(209) which condition reduces the efficiency of a centrifugal compressor? A. Resultant velocity B. Tangential velocity C. Pressure pulsations D. Air mass leaving the impeller at great velocities |
C. Pressure pulsations |
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(209) a constructional feature of the centrifugal compressor is that the impeller: A. Has two matching plates B. Is forged as a single unit C. Has a lightweight design D. is constructed in rows of blades and stators |
B. Is forged as a single unit |
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(210) in a dual-purpose compressor, revolutions per minute of the N2 compressor a re determined by the : A. Starter B. Fuel pump C. Fuel control D. Low-pressure turbine |
C. Fuel control |
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(210)which is a constructional feature of an axial-flow compressor casing? A. Split horizontal centerline B. Solid casting mount lines C. Access maintenance ports D. Accessory and oil pump mount pads |
A. Split horizontal centerline |
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(211)the percentage of combustion efficiency of a gas turbine is usually between: A. 60 and 70 B. 65 and 75 C. 75 and 95 D. 95 and 100 |
D. 95 and 100 |
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(211)which facet of jet engine design helps prevent igniter plug fouling? A. Gold plating on the plug B. Split electrode on the plug C. Ceramic coating on the plug D. Directing air around the plug |
D. Directing air around the plug |
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(211) carbon monoxide gas is poisonous and odorless, and has: A. A reddish color B. A greenish color C. A yellowish color D. No color |
D. no color |
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(212) The excess airflow that is not burned in the combustion section of the jet engine is used to : A. Cool the burner surfaces B. Operate pneumatic accessories C. Decrease the mass of exhaust gases D. Increase air in the compressor section |
A. Cool the burner surfaces |
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(212)fuel that accumulates after a failed engine start is: A. Returned to the fuel control by tubes B. Drained overboard by a drain system C. Burned on the next engine start attempt D. Allowed to evaporate |
B. Drained overboard by a drain system |
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(212)what is the most common type of fuel nozzle system? A. Pressure-atomizing B. Fuel blasting C. Fuel ejector D. Fuel tube |
Pressure-atomizing |
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(213)three types of turbine and vane assemblies used in jet engines are impulse, reaction, and : A. Fir tree B. Shrouded C. Unshrouded D. Reaction-impulse |
D. Reaction-impulse |
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(213)in the reaction type turbine, what in design causes the rotor to turn? A. The increase in pressure and the reduction in velocity of the exhaust gases occur in the passage between the blades B. The increase in pressure and the increase in velocity of the exhaust gases occur in the passage between the rotor blades C. The reduction of pressure and the increase in velocity of the exhaust gases occur in the passage between the rotor blades D. The reduction of pressure and the reduction in velocity of the exhaust gases in the passage between the rotor blades |
C. The reduction in pressure and the increase of velocity of the exhaust gases occur in the passage between the rotor blades |
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(214)the fir tree method of attaching turbine blades (buckets) to the turbine rotor disc is preferred because: A. Of the temperature differential between the turbine rotor disc and the blades B. It aids in preventing horizontal movement of the blades C. There is more blade tip shake during engine operation D. It aids in preventing axial movement of the bucket |
A. Of the temperature differential between the turbine rotor disc and the blades. |
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(214)which method of attaching the turbine blades (buckets) to the turbine rotor disc is used most frequently? A. Turbine blades fitted solidly into the rim of the rotor disc B. Rivet placed in a hole through the base of the turbine blade C. Close-fitting shroud ring around the outer perimeter of the disc D. Series of grooves or notches broached into the rim of the turbine rotor disc. |
D. Series of grooves or notches broached in the rim of the turbine rotor disc |
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(217)how many different types of loads can't be imposed on a jet engine bearing? A. 2 B. 3 C. 4 D. 5 |
B. 3 |
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(217) before inspecting new jet engine bearing, you should: A. Separate the halves B. Perform a spin check C. Apply a preservative coating D. Remove the preservative coating |
D. Remove the preservative coating |
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(218)the most commonly used bearing removal tool include: A. Drift pipes and hammers B. Bearing pullers and hammers C. Drift pipes and arbor presses D. Arbor presses and bearing pullers |
D. Arbor presses and bearing pullers |
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List the 4 major modules of the f108 engine. |
Fan, core engine, lpt, accessory |
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About how much of the f108's thrust is produced by the Fan's secondary airflow? |
80% of total thrust |
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The PTO assembly is mounted on which side of an inner flange of the front frame and is splined to and driven by the compressor forward shaft (except during starting conditions when the starter is the driving force). |
To the forward side of the inner flange |
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What does the damped thrust bearing of the no. 3 bearing support |
It supports the front of the high pressure rotor |
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