ASTB - OAR Practice Questions
(Mechanical and Aviation Portion)
The amplitude of an AC wave necessary to have the same relative voltage, current or
power as a DC source is known as _____? - answer Effective Amplitude
In a step up transformer, the electricity is taken from ____?
(A: Smaller coil / B: Break / C: Bigger coil) - answer Point C (Bigger Coil)
Which of the following is the best example of potential energy? - answer A heavy Ball
hanging from a crane
Why are compact cars less likely to flip over in a turn compared to sports utility
vehicles? - answerThe center of mass of compact cars is lower than an SUV's
What force is necessary to lift a 90 pound weight using 2 fixed pulleys and a movable
pulley? - answer30 Pounds
The actual mechanical advantage of a pulley system is defined as the ___? -
answerThe ratio of torques between the output pulley and the driving pulley.
A ball is thrown straight up into the air, what is its speed at its highest point? -
answerZero
If betty squeezes the middle of an upright, closed plastic soft-drink bottle, where will the
greatest increase in pressure occur? - answerPressure will be equal everywhere in the
bottle
Two identical barrels are exactly half full of different liquids. When placed in water, the
barrels float as shown in the figure. What difference in the liquids is most likely to
explain the difference in floating levels? (Barrel x shows to be less buoyant than barrel
Y) - answerLiquid X is more dense than liquid Y
A sign hangs by two pieces of wire (Wire A is 5 inches long, Wire B is 3 Inches long).
Which of the two wires bares the greater tension? - answerWire B
Which aircraft generally climbs at a higher angle?
(Apache AH-64 / C-130 / Cessna 310 / F-4 Phantom) - answerF-4 Phantom
The first digital-fly-by-wire (DFBW) was first tested in 1972 on a ___? - answerF-8
(Mechanical and Aviation Portion)
The amplitude of an AC wave necessary to have the same relative voltage, current or
power as a DC source is known as _____? - answer Effective Amplitude
In a step up transformer, the electricity is taken from ____?
(A: Smaller coil / B: Break / C: Bigger coil) - answer Point C (Bigger Coil)
Which of the following is the best example of potential energy? - answer A heavy Ball
hanging from a crane
Why are compact cars less likely to flip over in a turn compared to sports utility
vehicles? - answerThe center of mass of compact cars is lower than an SUV's
What force is necessary to lift a 90 pound weight using 2 fixed pulleys and a movable
pulley? - answer30 Pounds
The actual mechanical advantage of a pulley system is defined as the ___? -
answerThe ratio of torques between the output pulley and the driving pulley.
A ball is thrown straight up into the air, what is its speed at its highest point? -
answerZero
If betty squeezes the middle of an upright, closed plastic soft-drink bottle, where will the
greatest increase in pressure occur? - answerPressure will be equal everywhere in the
bottle
Two identical barrels are exactly half full of different liquids. When placed in water, the
barrels float as shown in the figure. What difference in the liquids is most likely to
explain the difference in floating levels? (Barrel x shows to be less buoyant than barrel
Y) - answerLiquid X is more dense than liquid Y
A sign hangs by two pieces of wire (Wire A is 5 inches long, Wire B is 3 Inches long).
Which of the two wires bares the greater tension? - answerWire B
Which aircraft generally climbs at a higher angle?
(Apache AH-64 / C-130 / Cessna 310 / F-4 Phantom) - answerF-4 Phantom
The first digital-fly-by-wire (DFBW) was first tested in 1972 on a ___? - answerF-8
