Question

1. where a worker is authorized to enter a confined space, it must be verified that the oxygen content is: a) 7% - 12% by volume. b) 2 psl - 12 psl. c) 19.5% - 23% by volume. d) 24% - 29% by volume. 24. the base of an inclined ladder shall be no further away from the base of a wall than: a) one metre out for every two metres of vertical height. b) one half the total length of the ladder. c) one quarter of the vertical height from the base of the ladder to where the ladder contacts the wall. d) one third of the vertical height of the supporting wall. 25. the employer shall ensure that cylinders containing acetylene are: a) secured in a vertical position. b) identified using a designated colour code. c) leak tested at least once every two years. d) equipped with fusible plugs on the top and bottom of the cylinder. 26. a worker shall not work or position himself under a raised vehicle or trailer unless it is supported by: a) stands or blocks. b) a jack with locking pins. c) hydraulic jacks that do not leak. d) an empty steel barrel on a cross member. 27. a load on a scaffold must not exceed what percent of the designed load for the scaffold? a) 50% b) 35% c) 25% d) 20% 28. a tool rest on a fixed grinder must be: a) adjusted when the grinder is in motion. b) set to a minimum 6 mm (1/4\) from the wheel. c) positioned for grinding on the side of the wheel. d) set to a maximum of 3 mm (1/8\) from the face of the wheel. 29. who is responsible for the personal safety of everyone in the shop? a) shop foreman b) plant superintendent c) individual worker d) alberta occupational health & safety

Explanation:

1. The safe oxygen content for a worker to enter a confined space is 19.5% - 23% by volume.
2. The base of an inclined ladder should be no farther away from the base of a wall than one - quarter of the vertical height from the base of the ladder to where the ladder contacts the wall for safety.
3. Cylinders containing acetylene should be secured in a vertical position to prevent leakage and other hazards.
4. A worker should not work under a raised vehicle or trailer unless it is supported by stands or blocks for stability and safety.
5. A load on a scaffold must not exceed 25% of the designed load to ensure structural integrity.
6. A tool rest on a fixed grinder must be set to a maximum of 3 mm (1/8") from the face of the wheel to prevent accidents.
7. The individual worker has the primary responsibility for their own and others' personal safety in the shop as they are directly involved in the work environment.

Answer:

1. c) 19.5% - 23% by volume.
2. c) one quarter of the vertical height from the base of the ladder to where the ladder contacts the wall.
3. a) secured in a vertical position.
4. a) stands or blocks.
5. c) 25%
6. d) set to a maximum of 3 mm (1/8") from the face of the wheel.
7. c) individual worker