MASS Cheat Sheet 2026

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

1. Which pair of cube faces can NEVER be adjacent on a folded cube? → Opposite faces
2. What is the perimeter of a square with a side length of 9 inches? → 36 inches
3. According to Newton's Third Law of Motion, when a rocket expels hot gases downwards, what is the 'reaction' force? → The force of the gases pushing the rocket upwards.
4. An operator is instructed by a signal person to lift a load that the operator believes exceeds the crane's rated capacity. What is the correct course of action? → Refuse to handle the load until safety has been assured.
5. A team won 18 of its 24 games. What percent of games did it win? → 75%
6. How long is a Dig Safe ticket/permit number valid in Massachusetts before re-marking is required? → 30 days
7. What is the safe procedure when an emergency alarm sounds? → Follow the evacuation plan to the assembly point
8. What is the correct response to a turbine vibration alarm exceeding safe limits? → Follow procedures to investigate and trip the unit if required
9. What is the value of 7²? → 49
10. If a contractor abandons a job and resumes weeks later past the 30-day window, what must happen? → A new Dig Safe notification must be filed
11. What is the correct action if a synthetic web sling shows cuts, burns, or chemical damage? → Remove it from service and destroy it
12. To verify a finished assembly, you should confirm that: → Every piece is used and fits without gaps or overlaps
13. An assembly drawing shows a bolt, a nut, and two washers being used to join two steel plates. What is the primary function of the washers in this assembly? → To distribute the load of the bolt and nut over a wider surface area.
14. A worker notices steam escaping from a high-pressure line joint. What is the correct first action? → Evacuate the area and report it through proper channels
15. What is the purpose of a guard on a coupling between a motor and pump? → To prevent contact with rotating parts that can cause entanglement
16. When inspecting the windshield wipers, what indicates they need replacement? → Torn, cracked, or streaking blades
17. A left arm held straight out horizontally most clearly indicates which intention? → Left turn
18. Solve for x: 3x + 7 = 22. → 5
19. When should the hand signal be completed? → Before you begin the maneuver
20. Which fraction is equivalent to 0.6? → 3/5
21. An engine produces 90hp and is 90% efficient. So, how much horsepower is being lost due to inefficiency? → 10hp
22. A lever pivots on a fulcrum. Moving the load closer to the fulcrum makes lifting it: → Easier
23. Who pays for the utility companies to locate and mark their lines after a Dig Safe request? → The utility owners provide marking at no charge to the excavator
24. Solve: 48 ÷ 6 + 2 × 3. → 14
25. When calculating load radius, the measurement is taken from the center of rotation to: → The center of the suspended load
26. What does white paint, flags, or stakes indicate at a job site? → The proposed excavation area or route
27. In Massachusetts, what is the penalty consequence of refusing a breathalyzer test for a first-offense driver age 21+? → 180-day license suspension
28. If a tank fills at 4 gallons per minute, how long to fill a 90-gallon tank? → 22.5 minutes
29. How is a right turn indicated with a hand signal? → Arm bent at the elbow pointing upward
30. Under OSHA 29 CFR 1926.251, who is responsible for inspecting rigging equipment before each use? → A competent person