Unit 5b (Ladders) Man Lifts & Scissor Lifts Quiz

Explanation
Ladders need to be inspected daily before use to ensure their safety and prevent any accidents or injuries. Daily inspections allow for any potential issues or damages to be identified and addressed promptly, reducing the risk of accidents. Regular inspections also help to maintain the ladder's condition and prolong its lifespan.

Explanation
A ladder should be safely set up at a slope of 1:4. This means that for every 4 units of horizontal distance, the ladder should rise 1 unit vertically. This slope provides a balance between stability and ease of climbing. A steeper slope may make the ladder unstable, while a shallower slope may make it difficult to climb. Therefore, a slope of 1:4 is considered to be the safest option for setting up a ladder.

Explanation
The given statement is false. The first cleat on a ladder should not be 16" from the bottom. The correct answer would depend on the specific ladder and its design. Different ladders may have different recommendations for the placement of the first cleat. It is important to refer to the manufacturer's instructions or guidelines for the specific ladder being used to ensure proper and safe usage.

Explanation
A single cleat ladder requires a change in the side rail from a 2x4 to 2x6 lumber at a height of 16 feet. This change is necessary to ensure the ladder's stability and safety when climbing to higher heights. The increased thickness of the 2x6 lumber provides additional strength and support, making it suitable for the ladder to withstand the increased load and potential stress at that height.

Explanation
According to the policy, when using a stepladder, you can climb up to the 3rd rung down from the top. This means that you can climb up to the rung that is 3 steps below the highest rung of the ladder.

Explanation
An extension ladder must always be tied off or held in place by another person before using to ensure stability and prevent accidents. This is because extension ladders can easily slip or fall if not properly secured. Tying off the ladder or having another person hold it provides an extra level of safety and reduces the risk of injury.

Explanation
According to Kiewit Bridge & Marine's Safety policy, the tallest step ladder allowed is 12 feet.

Explanation
To use a stepladder, you need to have the approval of your Superintendent. This implies that there is a specific protocol or rule in place that requires the Superintendent's permission before using a stepladder. Therefore, the statement "You need to have your Superintendent's approval to use a stepladder" is true.

Explanation
The bottom of the ladder should be 4 feet away from the building. This is because the ladder forms a right-angled triangle with the ground and the building. The ladder acts as the hypotenuse of the triangle, and the distance between the bottom of the ladder and the building is the base of the triangle. In a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the other two sides. Therefore, by using the Pythagorean theorem, we can determine that the base (or distance between the ladder and the building) should be 4 feet.

Explanation
A person should have three points of contact while climbing a ladder to ensure stability and safety. Having three points of contact means that both hands and one foot or both feet and one hand should be in contact with the ladder at all times. This helps to distribute the weight evenly and reduces the risk of slipping or falling. By maintaining three points of contact, the person can have a firm grip on the ladder and have better control over their balance while climbing.

Explanation
The correct answer is to extend the ladder 36 inches above the platform because this ensures stability and provides a secure handhold for climbing. Putting a gate at the top of the walk through ladder is necessary to prevent falls and accidents. Tying off the ladder at the top and the bottom is important to secure it in place and prevent it from slipping or sliding. Inspecting the ladder daily is crucial to identify any damage or defects that could make it unsafe to use.