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Polytechnic Cheat Sheet 2026

The 30 highest-yield Polytechnic facts, distilled from real exam questions. Print it, save it as a PDF, or study it here β€” free, no sign-up.

100 questions
150 min time limit
40.00% to pass
  1. Kirchhoff's Current Law (KCL) states that: β†’ The sum of currents entering a node equals the sum leaving it
  2. What type of wave is sound? β†’ Longitudinal wave
  3. Which protocol is used to send email? β†’ SMTP
  4. What is the formula for kinetic energy? β†’ KE = Β½mvΒ²
  5. What does HTML stand for? β†’ HyperText Markup Language
  6. What phenomenon describes the bending of light as it passes through a lens? β†’ Refraction
  7. What is the active voice in technical writing preferred for? β†’ Clarity and directness by making the subject perform the action
  8. What is electromagnetic induction? β†’ Generation of an electric current by a changing magnetic field
  9. What is the Second Law of Thermodynamics? β†’ Entropy of an isolated system always increases over time
  10. What is the value of sin(90Β°)? β†’ 1
  11. What is the role of a specification document in engineering projects? β†’ To define the requirements, constraints, and performance criteria a system must meet
  12. Which law states that the current through a conductor is directly proportional to the voltage across it, given constant temperature? β†’ Ohm's Law
  13. What is absolute zero on the Kelvin scale? β†’ 0 K
  14. What does the dot product of two perpendicular vectors equal? β†’ 0
  15. What does the periodic table organize elements by? β†’ Increasing atomic number
  16. What is the Taylor series expansion of eΛ£ centered at x = 0? β†’ 1 + x + xΒ²/2! + xΒ³/3! + ...
  17. What is Boyle's Law in terms of gas pressure and volume? β†’ At constant temperature, pressure and volume of a gas are inversely proportional
  18. What is a Gantt chart used for in project planning? β†’ Visualizing project tasks, timelines, and dependencies
  19. What is the purpose of a capacitor in a circuit? β†’ To store electrical energy in an electric field
  20. What is the value of e⁰? β†’ 1
  21. What is the First Law of Thermodynamics? β†’ Energy cannot be created or destroyed, only converted
  22. Which of the following is the correct formula for the quadratic formula? β†’ x = (-b Β± √(bΒ²-4ac)) / 2a
  23. What is the formula for pressure? β†’ P = F/A
  24. What does an inductor do in an electrical circuit? β†’ Stores energy in a magnetic field and opposes changes in current
  25. What is electric potential difference also known as? β†’ Voltage
  26. What is the time complexity of binary search? β†’ O(log n)
  27. What is an acid according to the BrΓΈnsted-Lowry definition? β†’ A proton donor
  28. What is the formula for work done by a constant force? β†’ W = F Γ— d Γ— cos(ΞΈ)
  29. What is a primary key in a relational database? β†’ A unique identifier for each row in a table
  30. What is the speed of light in a vacuum? β†’ 3 Γ— 10⁸ m/s
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