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OAR Cheat Sheet 2026

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

OAR exam key facts

  • The OAR consists of three computer-adaptive subtests: the Math Skills Test, Reading Comprehension Test, and Mechanical Comprehension Test. Source
  • The OAR takes about 1 to 2 hours to complete in APEX. Source
  • Examinees get no more than three attempts at the current OAR/ASTB-E, and a full ASTB-E retest requires 30 full calendar days between administrations. Source
  • Existing ASTB scores remain valid unless the examinee takes the ASTB-E, and the most recent attempt becomes the score of record. Source
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40 questions
60 min time limit
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  1. Which component opposes changes in current flow in a circuit? β†’ Inductor
  2. In a first-class lever, the fulcrum is located 2 ft from the load and 6 ft from the effort. If the load weighs 150 lb, what effort is required to balance it? β†’ 50 lb
  3. The volume of a cube is 125 inΒ³. What is the length of one edge? β†’ 5 in
  4. An inclined plane is 10 ft long and 3 ft high. What is its ideal mechanical advantage? β†’ 3.33
  5. If x = -3, what is the value of 2xΒ² - 5x + 1? β†’ 34
  6. A screw with a pitch of 0.5 cm is turned with a screwdriver handle of radius 2 cm. What is the mechanical advantage (use Ο€ β‰ˆ 3.14)? β†’ 25.12
  7. Read the sentence: 'The officer's **tenacity** in pursuing the mission despite setbacks ultimately led to its success.' What does 'tenacity' most nearly mean? β†’ Persistence
  8. What happens to the total resistance when resistors are connected in parallel? β†’ It decreases below the smallest individual resistor
  9. A rectangular prism has a length of 8 cm, a width of 5 cm, and a height of 3 cm. What is its surface area? β†’ 158 sq cm
  10. Which of the following is the greatest common factor (GCF) of 48 and 36? β†’ 12
  11. If the flow rate through a pipe is 12 liters per minute and the cross-sectional area of the pipe is 4 cmΒ², what is the flow velocity? β†’ 0.5 m/s
  12. What is the coefficient of xΒ² in the expression 7 - 3xΒ² + 4x? β†’ -3
  13. Which of the following best defines the property of a fluid known as viscosity? β†’ The fluid's internal resistance to flow.
  14. A contractor bids $18,000 to paint a facility. Materials cost $4,800 and labor is $280 per day for 10 days. What is the contractor's profit? β†’ $9,200
  15. What is the value of 3/4 + 5/8? β†’ 11/8
  16. In a coordinate plane, line m has a slope of 3/4. What is the slope of a line perpendicular to m? β†’ βˆ’4/3
  17. A regular hexagon has a side length of 6 cm. What is the sum of its interior angles? β†’ 720Β°
  18. What is the degree of the polynomial 5xΒ³ - 2x + 7? β†’ 3
  19. A rope is cut into pieces of 2.5 feet each. If the original rope is 17.5 feet long, how many pieces are cut? β†’ 7
  20. A sailor earns $2,400 per month. If 25% is withheld for taxes, what is the take-home pay? β†’ $1,800
  21. In a venturi meter, what happens to the fluid pressure in the constricted (narrow) section compared to the wider section? β†’ Pressure decreases
  22. What is the value of |3x - 7| when x = 1? β†’ 4
  23. An aircraft travels 480 miles in 1.5 hours with a tailwind and 480 miles in 2 hours against the wind. What is the speed of the wind? β†’ 40 mph
  24. Which simple machine is represented by a doorstop being pushed under a door? β†’ Wedge
  25. A military vehicle travels 360 miles on 24 gallons of fuel. At the same efficiency, how many gallons are needed for a 525-mile trip? β†’ 35 gallons
  26. Expand and simplify: (2x + 3)(x - 7) β†’ 2xΒ² - 11x - 21
  27. Which class of lever has the effort applied between the fulcrum and the load? β†’ Third class
  28. If a fuel tank holds 480 gallons and is currently 5/8 full, how many gallons of fuel are in the tank? β†’ 300 gallons
  29. A dam holds back water 30 feet deep. At what depth below the surface is the pressure greatest? β†’ At 30 feet
  30. If 7x = 56, what is the value of x? β†’ 8
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How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. med.navy.mil β€” Exam format, retake policy, score validity, test delivery, eligibility, score release, time limit Β· verified Oct 2026