OSHA Day #2 Flashcards
Are employers required to protect employees from workplace hazards? How?
Yes, they must use all possible engineering and work practice controls to eliminate and reduce hazards
Does using personal protective equipment (PPE) eliminate hazards?
It controls but does not eliminate hazards
What are some examples of engineering controls?
Handrails, silica exposure controls etc. (side note : respiratory protection updated to vacuum/wet method)
What is the difference between a helmet and a hard hat?
Helmets stay on your head if you fall and protect the top of the head and side of the head. Hard hats only protect the top of the head and can fall off.
What type of training should be offered to employees with regards to use of PPE?
How it is necessary, how it will protect them, what are the limitations, when and how to wear, how to identify signs of wear, how to clean and disinfect
When can employers have employee pay for PPE?
The employer must replace PPE, except when the employee has lost of intentionally damages PPE
What is the difference between prescription glasses vs. safety glasses?
Prescription does not provide adequate protection vs safety glasses have side shields and corrective lenses mounted behind protective lenses
What is the biggest problem with spoggles?
The biggest problem is knowing how to take them off without getting any metal shaving on their face and the fog up
When should one use face shields
For chipping concrete and cutting steel, attach to a hard hat and safety glasses.
When to use welding shields?
When welding, even when watching or being inclose proximity with someone who’s welding.
When carpenters use the torch to cut rebar what eye protection do we mostly see them using?
Dark sunglasses
When must foot protection be worn?
soil tampers, jack hammers, moving heavy objects, wet slippery floors, etc
Some jacks move well
What’s a quick trick to know that you need hearing protection
If you have to raise your voice with someone that’s 3 ft away.
When to use Kevlar sleeves?
Protects your wrists and arms from cuts and scrapes. Use when doing demolition, handling sheet metal, or working above suspended ceilings.
What do you need for drilling concrete overhead?
Hard hats, goggles, respiratory protection wet methods – engineer the hazard out – remember to refer to the SDS (safety data sheet)
What should you use when Cutting metal studs with chop saw?
use Face shields & ear plugs
What should you use when Placing concrete?
Wear Eye protection and Kevlar gloves
What should you use when doing demolition work
Wear Ear protection and armored gloves
What is the difference between a qualified and competent person?
Competent person is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.
Who is the competent person on the job site
Competent person are capable of existing and predictable hazards and they authorized to do something about it
KNOW General excavation requirements by the numbers.
At 2 feet, we push the spoils back, at 3 feet, we check our ladder, at 4 feet, we test for safety, at 5 feet, protection kicks in, at 6 feet, we watch for falls, at 8 feet, we set benches, and at 10 feet, we avoid power lines!
Can you be in a trench that has water?
Less than 1 ft it’s ok, otherwise get out and ensure continuous pumping
What’s the effect of rain on soil? Why is it important to check trenches after a rain event?
Inspect all excavations after a rain even it cans severly undermine the sides of the excavation and more prone to cave in essentially making it weak
Overhead utilities – what distance is known as safe distance?
10 ft
Why is it important to de-energize or isolate power lines?
To prevent electric shocks, avoid fires, protect equipment, to keep everyone safe
What does the heavy equipment operator do when they hit the power lines?
MUST stay in the vehicle. If you get out make sure to pop out far enough to not lose your balance, shuffle your feet or hop.
Are you familiar with the underground installations? What does each color stand for? Red, Yellow, Orange
Red = electric
yellow= gas-oil
orange= communication CATV
blue = water
green = sewer
pink= temporary surveying markings
white= proposed excavation
Who should you call before you start digging?
811 within 3-10 days in advance
What is a critical environment? What is McCarthy’s standard policy with regards to excavation and underground utilities?
Pothole, hand digging around live utilities, Vacuum trucks
Explain potholing.
Potholding = to safely identify and map underground utilities before starting major excavation work
What are some common methods of potholing?
Hand digging, vacuum excavation, backhoes and excavators
Why are employees not allowed to stand under bucket when digging?
Falling debris, bucket malfunctions, unexpected movements, equipment failure
What are the crossing excavation requirements?
Must have a 6 ft guard
How does soil get classified?
Should be classified by a competent person
What does Type A soil mean?
Very stable and has high level of cohesion, includes many types of clay
Type B soil?
Less stable than type A, but better than Type C can include clays, loams, silt, and sandy variations
Type C soil?
The least stable it is a submerged rock that is not stable can include gravel, and loamy sand
When should you inspect a shoring and who should inspect?
Daily and before each shift a competent person should be inspecting it
What are some types of Protective Systems?
Hydraulic shores., trench boxes, fall protection
Simple slope short term
For urgent work (opened less24 hours) → they dig very steep (½:1).
Simple slope type A
For Type A soil → they reduce the steepness a bit (¾:1).
Simple slope type B
For Type B soil → they play it safe (1:1).
simple slope type C
For Type C soil → they go for a gentle slope (1 ½:1) because it’s the least stable.
Why is it a 20 ft max for shoring
Must have an engineered system.
What is the difference between a gradient slope and side slope?
The gradient slope measures how steep a surface is over a distance. A side slope measures the incline of the sides of a slope
