Flashcards for Engineering Science Midterm Review

Flashcards for Engineering Science Midterm Review

Simple Machines

• What are the six types of simple machines?

  • Lever

  • Pulley

  • Inclined Plane

  • Wheel and Axle

  • Wedge

  • Screw

• How do you calculate the Ideal Mechanical Advantage (IMA) of a lever?

  • Formula not provided

• How do you calculate the Actual Mechanical Advantage (AMA)?

  • Formula not provided

• What is the formula for efficiency?

  • Formula not provided

Gear Ratios

• What is the formula for gear ratio?

  • Formula not provided

• How does gear ratio affect torque and angular velocity?

  • Explanation not provided

Mechanical Efficiency

• How do you calculate efficiency when AMA and IMA are given?

  • Answer not provided

• If a machine has an efficiency of 29% and performs 225 J of useful work, how much input work is required?

  • Answer not provided

• What is the mechanical advantage of a machine that requires 17 N of input force to exert 40 N of output force?

  • Answer not provided

Energy, Work, and Power

• Define energy.

  • The ability to do work, measured in joules (J).

• Define work.

  • The transfer of energy by a force, measured in joules (J).

• Define power.

  • The rate of doing work, measured in watts (W).

• What is the formula for electric power?

  • Voltage × Current

Mechanisms

• What are the four types of motion?

  • Linear

  • Rotary

  • Oscillating

  • Reciprocating

• What are the input and output motions of a rack and pinion?

  • Input: Rotary

  • Output: Linear

• What are the input and output motions of a crank and slider?

  • Input: Rotary

  • Output: Reciprocating

Circuits

• Define current, voltage, and resistance.

  • Current: Flow of electric charge, measured in amperes (A).

  • Voltage: Potential difference, measured in volts (V).

  • Resistance: Opposition to current, measured in ohms (Ω).

• What is Ohm’s Law?

  • Answer not provided

• How do you find the equivalent resistance of resistors in series?

  • Answer not provided

• How do you find the equivalent resistance of resistors in parallel?

  • Answer not provided

Fluid Power

• What is the equation for pressure?

  • Pressure = Force per unit area

• What is Pascal’s Law?

  • Pressure applied to a fluid is transmitted uniformly in all directions.

• If a small piston has an area of 10 in² and a large piston has an area of 45 in², how much force must be applied to the small piston to lift a car weighing 1.2 × 10⁴ lbs?

  • Answer not provided

• What is the flow velocity of a fluid if the flow rate is provided and the cross-sectional area is provided?

  • Answer not provided