Free Construction Craft Worker Red Seal Examination Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Construction Craft Worker Red Seal Examination practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A construction worker checks a supplier label for a product classified as an oxidizing liquid, Category 2. Which WHMIS pictogram is associated with that classification?

   1. A.Flame over circleCorrect answer: A
   2. B.Gas cylinder
   3. C.Exploding bomb
   4. D.Skull and crossbones

   Explanation: CCOHS states that "The flame over circle pictogram is used for the following classes and categories:" and lists "Oxidizing liquids (Category 1, 2 and 3)". Category 2 therefore uses the flame over circle; the other symbols designate other hazard categories.

   Reference: CCOHS WHMIS Pictograms — What pictograms are used with WHMIS hazard classes and categories?

2. 2A crew installs panels against excavation walls and braces the panels with hydraulic jacks. What is this wall-support system called?

   1. A.Benching
   2. B.Sloping
   3. C.ShoringCorrect answer: C
   4. D.Trench shielding

   Explanation: CCOHS states that "Shoring is a system that supports the sides or walls" and that "Shoring requires installing aluminum, steel, or wood panels that are supported by screws or hydraulic jacks." Sloping and benching reshape the soil, while a trench shield primarily protects workers from a cave-in.

   Reference: CCOHS Trenching and Excavation — Temporary protective structure

3. 3A worker sets an extension ladder against a wall with its support point 4.0 m above level ground. Using the CCOHS 1:4 placement rule, how far should the foot be from the wall?

   1. A.0.5 m
   2. B.1.0 mCorrect answer: B
   3. C.2.0 m
   4. D.4.0 m

   Explanation: CCOHS says the "base should be one foot away from wall for every four feet in height". The same ratio applies in metres: 4.0 m ÷ 4 = 1.0 m. The other results come from dividing the height by eight, two, or one instead of four.

   Reference: CCOHS Ladder Safety — Setup and placement

4. 4During slab placement, a crew draws a straightedge across fresh concrete to remove excess material and bring the surface to the specified grade. What is this operation called?

   1. A.ScreedingCorrect answer: A
   2. B.Bull floating
   3. C.Troweling
   4. D.Broom finishing

   Explanation: The American Cement Association says, "Screeding or strikeoff is the process of cutting off excess concrete to bring the top surface of the slab to proper grade." Bull floating, troweling and broom finishing are other concrete surface operations.

   Reference: American Cement Association: Working with Concrete — Screeding

5. 5A masonry tender must prepare a specified 1:2:9 cement:lime:sand mortar mix by volume. If the batch contains four equal-volume buckets of lime, how many of the same buckets of sand are needed?

   1. A.8 buckets
   2. B.9 buckets
   3. C.18 bucketsCorrect answer: C
   4. D.36 buckets

   Explanation: The National Research Council explains that "a 1:2:9 mix will contain one unit of volume of cement, 2 units of lime and 9 units of sand." Four buckets of lime equal 4 ÷ 2 = 2 proportion units, so sand is 2 × 9 = 18 buckets. Eight doubles the lime quantity, nine omits scaling, and 36 treats the four lime buckets as four cement proportion units.

   Reference: Key Considerations for Repointing Mortars for the Conservation of Older Masonry — Section 7, Design of a mortar mix, p. 9

6. 6While installing a water line, a construction craft worker installs a component to stabilize the pipe and help prevent breaks. Which component performs that function?

   1. A.Grade ring
   2. B.Thrust blockCorrect answer: B
   3. C.Catch basin
   4. D.Valve chamber

   Explanation: The occupational analysis directs the worker to "install thrust blocks to stabilize the line and eliminate breaks". The other components serve different water or sewer system functions.

   Reference: National Occupational Analysis - Construction Craft Worker — Task 18, sub-task F-18.01.04

7. 7A road crew cuts planned joints in a concrete pavement so drying-related cracking occurs at the intended locations. What type of joint is designed for this purpose?

   1. A.Construction joint
   2. B.Isolation joint
   3. C.Contraction jointCorrect answer: C
   4. D.Expansion joint

   Explanation: The American Cement Association explains that "In contraction joints that have been correctly designed and constructed, the cracks will occur below the joints." This placement directs contraction cracking to the planned joint locations.

   Reference: American Cement Association: Applications of Cement — Concrete pavement, After Placing, Cracking Control

8. 8A worker's crew uses local exhaust ventilation to remove airborne dust near its source. Under the hierarchy of controls, what type of control is this?

   1. A.Administrative control
   2. B.Engineering controlCorrect answer: B
   3. C.Substitution control
   4. D.Personal protective equipment

   Explanation: CCOHS lists "Ventilation – using local exhaust or general dilution ventilation to remove or reduce airborne products" among engineering controls. This measure controls airborne material at its source rather than changing work schedules or relying on equipment worn by the worker.

   Reference: CCOHS Hierarchy of Controls — What are examples of engineering control methods?

9. 9A site crew installs a temporary sediment barrier made of geotextile fabric embedded in the soil and held by wooden or metal posts. What is this control called?

   1. A.Sediment fenceCorrect answer: A
   2. B.Earthen berm
   3. C.Tracking pad
   4. D.Sediment pond

   Explanation: Parks Canada describes "Sediment fences (frequently referred to as silt fences) are temporary sediment barriers consisting of synthetic filter fabric entrenched into the soil with attached wooden or metal posts." The other options are different sediment-control measures.

   Reference: Parks Canada Environmental Standards and Guidelines, Ontario Waterways — Sediment Control ESG-2-Pre, p. 1

10. 10During a scaffold inspection, a worker notices a plank projects only a very small distance beyond its support. What specific failure does CCOHS associate with too little plank overhang?

    1. A.The plank may tip over its support.
    2. B.The plank may slip off its support.Correct answer: B
    3. C.The plank may buckle between supports.
    4. D.The plank may split along its grain.

    Explanation: CCOHS says, "Make sure the planks have an appropriate amount of overhang – too much and the planks may tip, and too little and the planks may slip off." Tipping is associated with excessive overhang; buckling and splitting are not the stated consequence of insufficient overhang.

    Reference: CCOHS: Scaffolds - Use — What should you do when using a scaffold?