Free Tower Crane Operator Interprovincial Red Seal exam Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Tower Crane Operator Interprovincial Red Seal exam practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A British Columbia tower crane operator finds a defect during use and enters it in the inspection and maintenance record system. Each candidate below holds only the stated role. To whom must the defect be reported immediately under section 14.35?

   1. A.The crane supervisorCorrect answer: A
   2. B.The crane manufacturer
   3. C.The professional engineer
   4. D.The prime contractor

   Explanation: Section 14.35(2) requires defects to be "reported immediately to the supervisor, who must determine the course of action to be taken". Other parties have distinct responsibilities, but this immediate report is to the supervisor.

   Reference: WorkSafeBC Occupational Health and Safety Regulation, Part 14 — section 14.35(2)

2. 2In British Columbia, a tower crane manufacturer has provided no maximum operating wind speed. The planned load can be handled safely at the regulatory maximum. What is the highest operating wind speed allowed by the default rule?

   1. A.30 km/h
   2. B.40 km/h
   3. C.50 km/hCorrect answer: C
   4. D.80 km/h

   Explanation: Under section 14.92(4), "the maximum allowable wind speed in which a tower crane may be used is 50 km/h (30 mph), or less if a load cannot be handled safely because of wind." With no manufacturer's limit and a load that remains safe at that speed, the default maximum is 50 km/h. The 30 value confuses mph with km/h.

   Reference: WorkSafeBC Occupational Health and Safety Regulation, Part 14 — section 14.92(4)

3. 3A tower crane operator must estimate the mass of a solid rectangular concrete block. Its dimensions are 2.0 m by 1.5 m by 0.2 m, and concrete has a unit mass of 2,400 kg/m³. What is the block's estimated mass?

   1. A.720 kg
   2. B.1,440 kgCorrect answer: B
   3. C.2,880 kg
   4. D.7,200 kg

   Explanation: The Red Seal formula for a rectangular block is "length × width × height × unit weight". Substituting gives 2.0 m × 1.5 m × 0.2 m × 2,400 kg/m³ = 1,440 kg. Dividing by two gives 720 kg, doubling the height gives 2,880 kg, and omitting the height gives 7,200 kg.

   Reference: Tower Crane Operator - Exam Information — Math Formulas, Cube

4. 4A rigger selects a sling rated for 4.0 tonnes in a single vertical hitch. For a choker hitch, apply the CCOHS limit of 75% of that rating; assume no lower limit is specified for the choke angle. What is the maximum load for this hitch?

   1. A.2.0 tonnes
   2. B.3.0 tonnesCorrect answer: B
   3. C.3.5 tonnes
   4. D.4.0 tonnes

   Explanation: CCOHS says to "Use choker hitches at 75% or less of the rated sling capacity". The highest load at this limit is 4.0 tonnes × 0.75 = 3.0 tonnes. Using 50% gives 2.0 tonnes; applying only half the required 25% reduction gives 3.5 tonnes; and omitting the reduction gives 4.0 tonnes. The choke angle may require a lower capacity.

   Reference: Materials Handling – Rigging or Sling Hitches — How should you use choker hitches?

5. 5During a tower crane pre-lift check, a known test load is 5.0 tonnes and the load moment indicator displays 4.6 tonnes. Expressed as a percentage of the known load, by how much is the reading low?

   1. A.4.0% low
   2. B.8.0% lowCorrect answer: B
   3. C.8.7% low
   4. D.92.0% low

   Explanation: The standard says "LMI calibration is confirmed by comparing known load against LMI readings". The difference is 5.0 − 4.6 = 0.4 tonnes, and 0.4 ÷ 5.0 × 100 = 8.0% low. Dividing by twice the known load gives 4.0%; dividing by the displayed load gives about 8.7%; and 92% is the displayed-to-known ratio, not the shortfall.

   Reference: Red Seal Occupational Standard – Tower Crane Operator — Sub-task E-11.01, performance criterion E-11.01.01P, p. 93

6. 6During a tower crane lift, a signaller holds a forearm vertical, points one forefinger upward and moves the hand in a small horizontal circle. Which command is being signalled?

   1. A.HoistCorrect answer: A
   2. B.Lower
   3. C.Stop
   4. D.Dog Everything

   Explanation: CCOHS identifies the signal: "Hoist: With forearm vertical, forefinger pointing up, move the hand in a small horizontal circle." The operator should interpret it as hoist.

   Reference: Materials Handling – Crane and Hoist Hand Signals — What are examples of some common hand signals?

7. 7A British Columbia tower crane operator tracks use of a rotation-resistant hoist rope with 12 outer strands and no plastic-coated inner core. The rope manufacturer gives no alternative interval. After how many hours of use is the prescribed dead-end shortening due?

   1. A.250 hours
   2. B.500 hoursCorrect answer: B
   3. C.750 hours
   4. D.1,000 hours

   Explanation: Section 14.91(1) specifies that a rotation-resistant hoisting rope must be shortened "after every 500 hours of use" unless one of its listed exceptions applies. With fewer than 14 outer strands, no plastic-coated inner core, and no alternative manufacturer specification, the interval is 500 hours.

   Reference: WorkSafeBC Occupational Health and Safety Regulation, Part 14 — section 14.91(1)(a)–(c)

8. 8A qualified tower crane operator assists with an erection in British Columbia that varies from the crane manufacturer's instructions. Whose instructions must govern the variation under section 14.73.2?

   1. A.A professional engineer'sCorrect answer: A
   2. B.The qualified supervisor's
   3. C.The rigging coordinator's
   4. D.The site safety officer's

   Explanation: Section 14.73.2(1)(b) specifies the instructions of "a professional engineer, if the installation varies from the crane manufacturer's instructions". A qualified supervisor directs the work, but that does not replace the engineer's instructions for the variation.

   Reference: WorkSafeBC Occupational Health and Safety Regulation, Part 14 — section 14.73.2(1)(b)–(2)

9. 9A tower crane operator is reviewing chemical exposure when selecting nylon and polyester web slings. According to CCOHS guidance, which pairing identifies the chemical that can damage each material?

   1. A.Nylon: acids; polyester: alkalisCorrect answer: A
   2. B.Nylon: alkalis; polyester: acids
   3. C.Nylon: acids; polyester: acids
   4. D.Nylon: alkalis; polyester: alkalis

   Explanation: CCOHS states "Nylon slings are damaged by acids, but resist alkalis" and "Polyester slings are damaged by alkalis but resist acids". It also advises checking the manufacturer's conditions for the exact sling material.

   Reference: Materials Handling - Synthetic Web Slings — What should you know about using synthetic web slings?

10. 10In British Columbia, workplace layout makes it impracticable to position enough test weights for a tower crane's maximum-load limit test before the shift. For the initial test, the switch setting must be below the percentage of maximum rated capacity specified by the regulatory cutoff. What is that cutoff?

    1. A.70%
    2. B.80%Correct answer: B
    3. C.90%
    4. D.100%

    Explanation: Section 14.81(4)(a) requires the switch to "be set to activate at a load of less than 80% of the maximum rated capacity for the crane and tested using test blocks". The threshold is 80%; the actual setting must be below it. The rule also requires resetting and testing before a lift greater than the initial setting.

    Reference: WorkSafeBC Occupational Health and Safety Regulation, Part 14 — section 14.81(4)