ASTB Mechanical Comprehension ACTUAL
Exam Questions and CORRECT Answers
Displacement - CORRECT ANSWER - final position-initial position
Velocity - CORRECT ANSWER - change in position/change in time
Average velocity - CORRECT ANSWER - displacement/change in time
Acceleration - CORRECT ANSWER - change in velocity/change in time
Vertical velocity - CORRECT ANSWER - original vertical velocity-gravity x time
Newton's 1st law - CORRECT ANSWER - A body at rest will tend to stay at rest, while a
body in motion will tend to remain in motion, unless acted upon by an external force
Newton's 2nd law - CORRECT ANSWER - The acceleration of an object is directly
proportional to the force being exherted on in and inversely proportional to its mass. (force =
mass*acceleration)
Force equals... - CORRECT ANSWER - Mass x acceleration
Weight equals... - CORRECT ANSWER - mass x gravity(9.8 m/s)
Torque equals... - CORRECT ANSWER - radius x force
Work equals... - CORRECT ANSWER - force x displacement
,Power equals... - CORRECT ANSWER - work/time
Mechanical Advantage - CORRECT ANSWER - output force/input force
Mechanical advantage: incline - CORRECT ANSWER - slant length/rise
Mechanical advantage: Wedge - CORRECT ANSWER - length/width
Mechanical advantage: Screw - CORRECT ANSWER - 2 x pie x radius/length between crests
Mechanical advantage: Lever - CORRECT ANSWER - effort distance/resistance distance
Mechanical advantage: Pulley - CORRECT ANSWER - More amount of connecting ropes
gives greater mechanical advantage
Mechanical Advantage: Wheel and Axle - CORRECT ANSWER - Radius of wheel/radius of
axle
Gear Ratio - CORRECT ANSWER - Driving gear/ driven gear or ?:?
Momentum equals... - CORRECT ANSWER - mass x velocity
density equals... - CORRECT ANSWER - mass/volume
pressure equals... - CORRECT ANSWER - force/area
Conduction - CORRECT ANSWER - Transfer of heat through physical contact
, Convention - CORRECT ANSWER - Transfer of heat through moving fluids(steam)
Radiation - CORRECT ANSWER - Transfer of heat through electromagnetic waves
Voltage(potential energy) equals... - CORRECT ANSWER - current x resistance
Electric power equals... - CORRECT ANSWER - current x voltage or voltage
squared/resistance
Scaler - CORRECT ANSWER - has magnitude, but no direction (like mass)
Vector - CORRECT ANSWER - A value that has both magnitude and direction
Gravitational potential energy - CORRECT ANSWER - Gravity x mass x height
When released, gravitational potential energy converts to - CORRECT ANSWER - Kinetic
energy
Pascal's Law - CORRECT ANSWER - pressure of fluid mechanics...hydraulics
1 horsepower equals how many watts? - CORRECT ANSWER - 746
What happens as air contracts? - CORRECT ANSWER - The air gets colder
Voltimeter? - CORRECT ANSWER - Measures total voltage in a circuit
Hydrometer - CORRECT ANSWER - Measures specific gravity of liquids
Exam Questions and CORRECT Answers
Displacement - CORRECT ANSWER - final position-initial position
Velocity - CORRECT ANSWER - change in position/change in time
Average velocity - CORRECT ANSWER - displacement/change in time
Acceleration - CORRECT ANSWER - change in velocity/change in time
Vertical velocity - CORRECT ANSWER - original vertical velocity-gravity x time
Newton's 1st law - CORRECT ANSWER - A body at rest will tend to stay at rest, while a
body in motion will tend to remain in motion, unless acted upon by an external force
Newton's 2nd law - CORRECT ANSWER - The acceleration of an object is directly
proportional to the force being exherted on in and inversely proportional to its mass. (force =
mass*acceleration)
Force equals... - CORRECT ANSWER - Mass x acceleration
Weight equals... - CORRECT ANSWER - mass x gravity(9.8 m/s)
Torque equals... - CORRECT ANSWER - radius x force
Work equals... - CORRECT ANSWER - force x displacement
,Power equals... - CORRECT ANSWER - work/time
Mechanical Advantage - CORRECT ANSWER - output force/input force
Mechanical advantage: incline - CORRECT ANSWER - slant length/rise
Mechanical advantage: Wedge - CORRECT ANSWER - length/width
Mechanical advantage: Screw - CORRECT ANSWER - 2 x pie x radius/length between crests
Mechanical advantage: Lever - CORRECT ANSWER - effort distance/resistance distance
Mechanical advantage: Pulley - CORRECT ANSWER - More amount of connecting ropes
gives greater mechanical advantage
Mechanical Advantage: Wheel and Axle - CORRECT ANSWER - Radius of wheel/radius of
axle
Gear Ratio - CORRECT ANSWER - Driving gear/ driven gear or ?:?
Momentum equals... - CORRECT ANSWER - mass x velocity
density equals... - CORRECT ANSWER - mass/volume
pressure equals... - CORRECT ANSWER - force/area
Conduction - CORRECT ANSWER - Transfer of heat through physical contact
, Convention - CORRECT ANSWER - Transfer of heat through moving fluids(steam)
Radiation - CORRECT ANSWER - Transfer of heat through electromagnetic waves
Voltage(potential energy) equals... - CORRECT ANSWER - current x resistance
Electric power equals... - CORRECT ANSWER - current x voltage or voltage
squared/resistance
Scaler - CORRECT ANSWER - has magnitude, but no direction (like mass)
Vector - CORRECT ANSWER - A value that has both magnitude and direction
Gravitational potential energy - CORRECT ANSWER - Gravity x mass x height
When released, gravitational potential energy converts to - CORRECT ANSWER - Kinetic
energy
Pascal's Law - CORRECT ANSWER - pressure of fluid mechanics...hydraulics
1 horsepower equals how many watts? - CORRECT ANSWER - 746
What happens as air contracts? - CORRECT ANSWER - The air gets colder
Voltimeter? - CORRECT ANSWER - Measures total voltage in a circuit
Hydrometer - CORRECT ANSWER - Measures specific gravity of liquids
