4B practice questions
Part B is the second paper of the 4th Class Power Engineer exam. Pass 4 covers it with 1,718 questions across 12 units and 55 chapters, each with an explanation for every answer choice. Try a real Part B question below.
Try a Part B question
This one is from Part B. Pick an answer to see how Pass 4 explains it, right or wrong.
A centrifugal pump on suction lift is primed from an external water supply. During priming, what is the role of the foot valve at the bottom of the suction line?
-
A. It progressively throttles the flow entering the impeller eye during normal pumping operation
-
B. A check valve holding the priming water in the line instead of draining back to the source
-
C. It admits air to break the suction-line siphon whenever the pump is stopped
-
D. It filters debris and weeds out of the incoming water
What Part B includes
- 12 units and 55 chapters, the whole Part B syllabus.
- 1,718 questions, with an explanation for every answer choice.
- 789 questions with a diagram in their explanation. Of those, 484 are animated or interactive.
- 55 chapter quizzes. Missed questions come back in a unit review.
- A timed practice exam: 100 questions, 3 hours, 65% to pass. It draws from every unit, weighted by each unit's exam weight.
- 12 cheatsheets, one per unit, printable as a PDF.
- 55 podcasts, one per chapter.
The 12 Part B units
| Unit | Exam weight | Chapters |
|---|---|---|
| B1 Lubrication | 6% | 2 |
| B2 Pumps & Compressors | 10% | 4 |
| B3 Boiler Safety | 10% | 5 |
| B4 Boiler Plant Ops | 14% | 6 |
| B5 Plant Maintenance | 10% | 4 |
| B6 Water Treatment | 10% | 5 |
| B7 Prime Movers | 7% | 5 |
| B8 Auxiliary Building Systems | 3% | 3 |
| B9 Refrigeration | 14% | 7 |
| B10 HVAC | 7% | 6 |
| B11 Heating & Cooling Systems | 7% | 6 |
| B12 Plant Types | 2% | 2 |
Pass 4's estimate of each unit's share of a 100-question paper. Regulators publish the units but not a per-unit question count.
Two plans
6 Month Access. C$193.50, one time. It doesn't auto-renew. That's C$32.25 a month, and it saves C$64.50 against six months of Monthly, which is 1.5 months free. You get a full refund if you ask within 14 days of paying.
Monthly. C$43 a month. It auto-renews, and you can cancel any time. Monthly has no refunds, but when you cancel you keep access until the end of the month you paid for.
Prices are in Canadian dollars, before tax, and applicable tax is added. Payments are by Stripe; we never see your card. You'll sign in with an email link first. See all the details on the plans page.
Start with Part A, free
Part A, the first paper, is free with no card: 1,928 questions across 12 units, and its own timed practice exam. See free 4A practice questions, or read the exam guide for the format of both papers.
Pass 4 is not affiliated with SOPEEC, Technical Safety BC, or any other exam or licensing body.