TradeExamPro › Apprenticeship & Trade Math
179 free practice questions for this exam, each with the reason for the answer and where to look it up.
10 questions, graded as you go, with the reason for every answer. No sign-up.
| Exam | ASVAB technical subtests (auto, shop, mechanical, electronics) |
|---|---|
| Who runs it | US military |
| Where | United States |
Question count, time limit and pass mark differ by where you take it. Check the official candidate bulletin from the organisation that runs your exam.
Why is oil rather than air used to transmit force in a hydraulic jack?
B. Oil is nearly incompressible
A liquid hardly changes volume under pressure, so movement at the pump piston is passed directly to the ram. Air would squeeze down like a spring before the load moved.
Reference: Hydraulics: incompressibility of liquids
Three gears are meshed in a straight row. The first gear turns clockwise. Which way does the third gear turn?
D. Clockwise
Direction reverses at each mesh: the second gear turns counterclockwise and the third turns clockwise again. In a simple train, odd-numbered gears turn the same way as the first.
Reference: Gear drives: direction of rotation
Which of these tools works as a third-class lever, with the effort applied between the fulcrum and the load?
B. A pair of tweezers
In tweezers the joined end is the fulcrum, the fingers squeeze in the middle and the load is at the tips. A bottle opener puts the load (the cap) between the fulcrum and the hand, which makes it second class.
Reference: Simple machines: the three classes of lever
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NCCER Core curriculum · Trade math (fractions, geometry, conversions) · Blueprint and plan reading · Apprenticeship aptitude (math, mechanical, spatial, reading) · Mechanical aptitude tests (Bennett, Ramsay, Wiesen) · Electrical Levels 1 to 4 module tests · Pipefitting Levels 1 to 4 module tests · Bricklayer / mason journeyman · Roofer journeyman