PASMA Environmental Considerations 2

Question 1

What environmental factor must be checked before erecting a tower scaffold on grass?

Accepted Answer

Whether the ground beneath the grass is firm enough to support the tower load without sinking

Answer

Grass conceals the true ground condition. The soil beneath may be soft, waterlogged, or over a void. The ground must be probed and assessed for firmness. Sole boards under base plates may be needed to distribute the load.

Question 2

How does fog affect the safe use of a tower scaffold?

Accepted Answer

Fog reduces visibility, makes surfaces wet and slippery, and obscures overhead hazards and approaching vehicles

Answer

Fog reduces visibility at height, making it difficult to see hazards, communicate with ground level, and judge distances. Moisture from fog makes surfaces slippery. Approaching vehicles may not see the tower. Additional lighting and high-visibility measures may be needed.

Question 3

What is the risk of positioning a tower scaffold near trees?

Accepted Answer

Falling branches, obscured visibility, tree roots creating uneven ground, and the tower becoming entangled in branches

Answer

Trees can drop branches (especially in wind), obscure visibility of the tower from vehicle operators, create uneven ground through root systems, and branches can snag on components during movement. Dead trees or branches pose a particular falling hazard.

Question 4

What environmental check is needed before using a tower scaffold near water?

Accepted Answer

Risk of the tower sliding into water, drowning risk if operatives fall, and the ground near water may be soft or waterlogged

Answer

Near water: the ground is often soft and waterlogged, increasing the risk of the tower sinking or sliding. If an operative falls into water, drowning is a risk. Life jackets, rescue equipment, and a water rescue plan must be in place. The bank may also be unstable.

Question 5

What is the 'wind chill' effect and why is it relevant to tower scaffold use?

Accepted Answer

Wind chill makes air temperature feel colder, reducing manual dexterity, increasing fatigue, and raising the risk of hypothermia in exposed operatives at height

Answer

Wind chill combines wind speed and temperature to create a lower 'feels like' temperature. At height, operatives are exposed with no shelter. Reduced dexterity from cold hands increases the risk of dropping tools or losing grip. Hypothermia can impair judgement.

PASMA Practice Test

PASMA Practice Test

PASMA Environmental Considerations 2