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A 2,000 lb load is lifted with a two-leg sling at 60° to the horizontal. What is the tension in each leg?
Here's why
Formula
On the exam formula sheetSling stress = ((length ÷ height) × weight) ÷ number of legs
Work it out
- 1
At 60°, height ÷ length = sin 60° = 0.866
- 2
Length ÷ height = 1 ÷ 0.866 = 1.1547
- 3
1.1547 × 2,000 lb = 2,309 lb
- 4
2,309 lb ÷ 2 legs = 1,155 lb per leg
Why it's right
Each leg, its height and the horizontal make a right triangle, so height ÷ length is the sine of the sling angle. The legs pull in at an angle, so each one carries more than half the load: about 1,155 lb at 60°, and the sling has to be rated for that.
Why not the others
- 1,000 lb — Half the load, only true if the legs hung straight down.
- 1,414 lb — The tension at 45°, not 60°.
- 2,000 lb — The whole load on one leg, as in a single vertical hitch.
Remember
Length over height, times the weight, then divide by the legs. Given an angle instead, length over height is 1.155 at 60°, 1.414 at 45° and 2 at 30°.
Your weak areas
Practice exam · 135 questions · 4 hours
79%
PASS · 107 / 135
By block
How it works
Pick a block
Start with the one you dread.
Practice
Exam-style questions, one at a time.
Read the why
An explanation on every answer.
See your weak areas
Your accuracy, block by block.
Sit the practice exam
Timed, weighted, until you pass.
All six blocks of the 433A exam
Weighted the way the real exam is, so your practice time goes where the marks are. New to the exam? How the 433A exam works.
Block A
Common Occupational Skills
Safety law and lockout, trade science and math, drawings, shop practice and precision measurement, fasteners and threads, installation and levelling.
Free sample guide: Fasteners and ThreadsBlock B
Rigging, Hoisting and Lifting
Wire and fibre rope, chains, end fittings, hooks and shackles, sling loads and safety factors, blocks, hoists and cranes.
Free sample guide: Ropes, Chains and HardwareBlock C
Mechanical Power Transmission
Lubrication, shafts and keys, bearings, belt, chain and gear drives, couplings and clutches, seals, prime movers and shaft alignment.
Free sample guide: Belt DrivesBlock D
Material Handling and Process Systems
Pumps, conveyors and bulk handling, fans and dust collection, compressors, process piping and tanks, robotics and automation.
Free sample guide: Conveying SystemsBlock E
Fluid Power
Hydraulic and pneumatic theory, actuators, valves, pumps, filtration, air preparation, conductors and circuits.
Free sample guide: Pneumatic SystemsBlock F
Preventive and Predictive Maintenance
Maintenance programs, vibration analysis and balancing, NDT, oil analysis, condition monitoring, commissioning and decommissioning.
Free sample guide: Commissioning and DecommissioningWhere the questions come from
Accuracy is the whole product. Here's how we protect it.
The millwright manual, minus the dust
Everything the 433A exam covers, from rigging and alignment to pumps and hydraulics, turned into exam-style questions with the why behind every answer. Weighted block by block the way the real exam is.
Every answer explained
Each question shows why the right answer is right and why every wrong one is wrong, so you learn the rule, not just the letter. Spot something off? Report it from the question and it's fixed for everyone.
Built by a certified 433A millwright
Made by someone who sat this exam and passed it — not a content farm guessing at the trade.
1,400+ questions across 32 topics · 7-day money-back guarantee on your first payment, while you've seen under 20% of the answers · About SealReady
What you actually get
Find your weak block before exam day does
Block-by-block results after every practice exam, plus your weak areas tracked on your dashboard, so you spend your study time where it's actually costing you marks.
Understand the why, not just the letter
Every answer comes with a millwright's explanation of why it's right and why the other three aren't.
See if you're ready with a full practice exam
135 questions, timed, weighted block-by-block like the real 433A. Pass it here first.
A study guide for every topic
Every block and topic written up in plain trade language. 6 guides are free in full and the rest open their first section; Pro opens them all and the formula sheet.
Fits in a lunch break
Works on your phone. Knock out a 10-question set anywhere — every quiz you finish counts toward your progress.
Questions come back until you know them
Every Pro quiz brings back the ones you missed and the ones due for a refresh, with new questions each time. A question counts as completed once you get it right 3 times in a row.
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- 60 free questions (10 in every block), with explanations
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$34.99 CAD, once
A 433A prep course can cost $150 to $500.
7-day money-back guarantee on your first payment, while you've seen under 20% of the answers · Refund policy
- Everything in Pro for 90 days
- All 1,400+ questions and timed practice exams
- Missed questions come back until you get them right 3 times in a row
- The full study guides, a quiz for every topic, and the formula sheet
- Weak-area analysis, score history and study streaks
- Flashcards, spaced review, bookmarks and resume mid-quiz
- Priority email support
- One payment — nothing to cancel
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Same access, month to month.
$19.99 CAD / month
7-day money-back guarantee on your first payment, while you've seen under 20% of the answers · Cancel anytime
- Everything in Pro, month to month
- All 1,400+ questions and timed practice exams
- Missed questions come back until you get them right 3 times in a row
- The full study guides, a quiz for every topic, and the formula sheet
- Weak-area analysis, score history and study streaks
- Flashcards, spaced review, bookmarks and resume mid-quiz
- Priority email support
- Cancel anytime: Pro stays on to the end of the month you paid for
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