Military aptitude tests, sorted by the path you want

In flight, which component normally supplies a turbine helicopter's main electrical bus?

1. Static inverter
   An inverter only converts DC to AC; it produces no power of its own.
2. Standby aircraft battery
   The battery is for engine starts and limited emergency power; it would run down if it fed the bus all flight.
3. Engine magneto
   A magneto fires the spark plugs of piston engines and is separate from the electrical bus; turbines do not use one.
4. Engine-driven generator
   Once the engines run, the engine-driven generator feeds the main bus and recharges the battery.

ID 924256 · Report a problem

A quartermaster orders supplies costing $2,400. A 15% shipping fee is added. What is the total cost?

1. $2,760
   Fifteen percent of $2,400 is $360, and $2,400 + $360 = $2,760, the total with the fee (the same as $2,400 × 1.15).
2. $2,640
   $2,640 adds 10% ($240) instead of 15%; the fee is 0.15 × $2,400 = $360.
3. $2,415
   $2,415 adds $15 to the price, reading 15% as fifteen dollars instead of 0.15 × $2,400.
4. $360
   $360 is only the shipping fee; the question asks for the total, so the $2,400 still has to be added.

ID 716142 · Report a problem

Which statement can be inferred only from the passage?

1. Sperry's gyroscopic stabilizer was built to steer military aircraft toward their targets.
   The passage gives the device one job, holding the airplane level; military use and target steering are never mentioned.
2. During the demonstration, the mechanic on the wing moved the control surfaces while Sperry stood with raised hands.
   The passage says only that the mechanic walked out along the wing; it is the device that moved the control surfaces.
3. Sperry's stabilizer corrected changes in the airplane's attitude without help from the pilot.
   The passage says the device could hold the airplane level "without input from the pilot" by sensing attitude changes and moving the control surfaces itself, which is exactly this statement.
4. The stabilizer measured the airplane's airspeed to keep it level.
   The passage says the gyroscopes sensed changes in attitude; airspeed is never mentioned.

ID 813916 · Report a problem

IMPAIR most nearly means

1. impose
   Impose (to force a rule or burden on someone) shares only the im- prefix and says nothing about reducing strength or quality.
2. impede
   Impede means to slow or block progress; an obstacle impedes you without damaging your abilities the way an injury impairs them.
3. weaken
   To impair something is to damage it so it works less well — to weaken it, as fatigue impairs judgment.
4. destroy
   Destroy is too strong: impaired hearing or vision is reduced, not gone.
5. repair
   Repair is a sound-alike with the opposite meaning: it restores what impairing damages.

ID 1821325 · Report a problem

A bolt holds two flat metal plates together. The plates are pulled sideways in opposite directions, sliding along each other. The bolt is mainly under

1. shear
   The plates slide past each other and try to slice the bolt across its section, which is shear.
2. torsion
   Torsion is twisting about the bolt's axis, as when it is tightened with a wrench.
3. tension
   Tension would mean the plates pulling apart along the bolt's length, as when they are pried away from each other.

ID 716112 · Report a problem