308A Safety Regulations and Trade Practices 2

Question 1

What ventilation method is most effective when soldering or brazing in an enclosed or partially enclosed space?

Accepted Answer

Local exhaust ventilation (LEV) positioned directly at the source

Answer

Opening windows for natural cross-ventilation

Answer

General dilution ventilation using ceiling-mounted fans

Answer

No special ventilation is needed for low-temperature soldering

Question 2

What is the safest way to manually carry a large sheet of metal from a storage area to a workstation?

Accepted Answer

Carry it vertically using cut-resistant gloves, folded edges facing away, tip pointing downward

Answer

Hold the sheet flat overhead to clear other workers

Answer

Drag the sheet along the floor to minimize lifting strain

Answer

Stack multiple sheets together to reduce the number of trips

Question 3

According to Canadian occupational health standards, what is the permissible 8-hour noise exposure limit that triggers mandatory hearing protection?

Accepted Answer

85 dB(A)

Answer

75 dB(A)

Answer

90 dB(A)

Answer

100 dB(A)

Question 4

Before entering a confined space such as a large duct plenum to perform sheet metal work, what must happen?

Accepted Answer

Atmospheric testing must be completed and a confined space entry permit obtained

Answer

A supervisor must verbally approve entry

Answer

Simply inform a nearby coworker of your location

Answer

Turn off all electrical equipment inside the space

Question 5

What does the acronym SDS stand for, as introduced under the updated WHMIS 2015 standard?

Accepted Answer

Safety Data Sheet

Answer

Safety Data System

Answer

Standard Data Sheet

Answer

Substance Detection Summary

Question 6

When using an angle grinder to cut sheet metal, what is the most important safety precaution for the surrounding work area?

Accepted Answer

Clear combustibles and erect fire-resistant barriers around the work area

Answer

Wet down the area with water to control sparks

Answer

Ensure combustible materials are nearby for quick access after cutting

Answer

Work in a sealed, unventilated room to contain sparks

Question 7

Which type of respiratory protection is recommended when power-grinding stainless steel in a shop environment?

Accepted Answer

A half-face respirator fitted with P100 particulate filters

Answer

No protection is needed as stainless steel fumes are inert

Answer

A disposable N95 dust mask is fully adequate

Answer

A supplied-air breathing apparatus is always required