EEI TECH Cheat Sheet 2026

The 30 highest-yield EEI TECH facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. A transformer operates at 85% efficiency. If 4,000 watts enter, how many watts are output? → 3,400 W
2. A first-class lever has the effort 4 ft from the fulcrum and the load 1 ft from the fulcrum. What is its mechanical advantage? → 4
3. How many questions is the candidate expected to answer in the allotted 15 minutes? → 16
4. A square metal plate has a hole drilled in each corner. If the plate is rotated 90° clockwise, where does the top-left hole end up? → Top-right
5. In a block and tackle with 4 supporting rope segments, how much effort is needed to lift a 400 lb load (ignoring friction)? → 100 lb
6. What happens to the pressure exerted by a force when the area it acts on is reduced? → Pressure increases
7. A procedure reads: 'Verify insulation resistance before applying voltage.' What must happen FIRST? → Check insulation resistance
8. Three identical gears are placed in a row, each meshing with the next. If the first gear turns clockwise, which direction does the third gear turn? → Clockwise
9. A conduit bender is used to: → Form smooth, accurate bends in electrical conduit
10. A report says: 'Output declined by 15% following the storm due to debris accumulation on solar panels.' What is the most likely cause of the output decline? → Debris on solar panels
11. Looking at a schematic, a switch is shown as an open gap in a circuit line. What does this symbol represent? → An open (off) switch
12. Which practice helps prevent back injuries when lifting heavy equipment? → Lift with your legs, keep your back straight
13. What does 'Lockout/Tagout' (LOTO) protect workers from? → Unexpected energization of equipment during maintenance
14. If the second of the month is a Tuesday, what day is it on the 21st of that month? → Sunday
15. Express 0.625 as a fraction in its simplest form. → 5/8
16. Which statement about a balanced seesaw is correct? → The product of force and distance is equal on both sides
17. If a bolt viewed from the front shows a hexagonal head, what shape would the head appear if viewed from the end (top)? → Hexagon
18. A worker reads a procedure stating to 'de-energize and verify zero voltage before contact.' What is the primary purpose of this step? → To ensure worker safety from electrical shock
19. A hydraulic system applies 20 lb of force on a small piston of 1 sq in. The large piston has 5 sq in area. What output force is produced? → 100 lb
20. A motor runs for 8 hours consuming 3.5 kW. How many kWh does it use? → 28 kWh
21. In a hydraulic brake system, why is a liquid used instead of a gas? → Liquids are nearly incompressible and transmit force instantly
22. What does a torque wrench allow a technician to do? → Apply a precise amount of rotational force to a fastener
23. In a series circuit with three resistors, how does removing one resistor affect total resistance? → Total resistance decreases
24. Convert 3/5 to a percentage. → 60%
25. What is the most effective way to prepare for the TECH exam? → Practice Simulations
26. A socket wrench extension bar is most useful for: → Reaching and turning fasteners in deep or obstructed locations
27. Which tool measures electrical current in a live conductor without breaking the circuit? → Clamp meter
28. On an electrical panel diagram, the bus bar is shown as a thick horizontal line. What does the bus bar do? → Distributes power to multiple circuits
29. Which statement best describes a short circuit? → An unintended low-resistance path causing excessive current
30. Which would hit the ground first if a car and a bowling ball were both thrown off a 100-foot cliff at the same time? → There is no difference.