Safety Exam 2

Multiple lifts require that no more than _._________ members be hoisted per lift and that these members be rigged at least _._______ feet apart.

5 7

A safety line anchorage must be independent of any platform anchorage and capable of supporting at least _________________ lbs. per worker.

5,000

Each end of a scaffold platform, unless cleated or otherwise restrained by hooks, must extend over its support by at least _______ inches.

6 "

Falls are the leading cause of deaths in the construction industry. Open-sided floors and platforms ______ feet or more in height must be guarded.

6 '

Masonry walls more than ______ feet in height must be supported to prevent collapse

8

What is "Lock-out/Tagging" of circuits?

-Apply lock to power source -Tag deactivated controls. -Tag de-energized equipment and circuits at all points where they can be energized -Tags must identify equipment or circuits being worked on

OSHA has specific requirements for record keeping related to injuries and illnesses. List and describe the 2 main forms used for record keeping. Which form must be posted ? When must it be posted and for how long?

-OSHA 300- Log about work related injuries. -OSHA 300A- Summary about work related injuries. -Requires the annual summary to be posted for three months instead of one.

What is GFCI?

-Protects you from shock -Detects difference in current between the black and white wires -If ground fault detected, GFCI shuts off electricity in 1/40thof a second

What is the difference for men and women in concern for "let-go" current?

Difference between men and women is based on the relative body mass of the "average" man and woman.

Discuss the role ethics plays in construction safety. Include information about the employers and employees responsibilities related to ethics. Provide specific examples of possible "ethical dilemmas" which may be encountered by construction professionals

Ethics is the study of morality within a context established by cultural and professional values, social norms, and accepted standards of behavior. It is everyone's responsibility to provide good and ethical decisions on the jobsite, but it depends on the managers role to really define the guidelines of good ethical behavior in the workplace. It would be unethical for a foreman to knowingly provide and submit incorrect documentation in order to meet the expectations of the job.

A Personal Fall Arrest System consists of body belts, harnesses, and their components, such as anchorage points, lifelines, dee rings, and snap hooks. True False

False

OSHA requires that flexible cords used on a construction site be of certain rating. Discuss the rating and how one can determine that the cord being used complies.

Marked on cord S, ST, STO. Must be 3-wire type and designed for hard or extra-hard use

PFAS

anchorage, lifeline and body harness

Scaffold poles, legs, posts, frames, and uprights must be on ________________ and ________________ or other firm foundation.

base plates mud sills

List the 3 most common and effective fall protection systems used in the construction industry

guardrail safety net personal fall arrest

Platforms of a scaffold must: a. Be fully planked or decked with no more than _______ inch gaps b. Be able to support its weight and _____ times maximum load c. Be at least _______ inches wide

a. 1 b. 4 c. 18

Give the missing information about guardrails for the following: 3 pts. a. Top rails: _______ to ________ inches tall b. Midrails: _____________ between toprail and platform c. Toeboards: at least ________ inches high

a. 38 b. 45 c. halfway d. 3 1/2

Stairways with ______ or more risers, or higher than 30 inches, must be equipped with at least one handrail.

4

The height of the scaffold should not be more than ________ times its minimum base dimension unless guys, ties, or braces are used.

4

Trigger height is

4 feet

List a minimum of 3 hazards most commonly associated with steel erection work.

1. Falls 2. Improper use of equipment 3. Equipment failure

What are 2 of the possible hazards employees working on scaffolds are exposed to.

1. falling 2. Electrocution from overhead lines

Explain what is meant by an "Assured Equipment Grounding Conductor Program"

1.The program must cover: -All cord sets -Receptacles not part of a building or structure -Equipment connected by plug and cord 2.Program requirements include: -Specific procedures adopted by the employer -Competent person to implement the program -Visual inspection for damage of equipment connected by cord and plug

Non self-supporting ladders should be positioned at an angle where the horizontal distance from the top support to the foot of the ladder is _________ the working length of the ladder. 2 pts.

1/4

If a worker on a scaffold can fall more than _______ feet, protect them by guardrails and/or PFAS.

10

There must be a stairway or ladder at points of access where there is an elevation break of _____ inches or more.

19

Excavations more than 4 feet should be tested for oxygen deficiency before an employee enters. Such atmospheres contain less than _________ % oxygen.

19.5

Spoils from an excavation shall NOT be placed within ________ feet from the edge of an excavation.

2

Handrails and top rails must be able to withstand a force of __________ pounds.

200

A stairway, ladder, or ramp must be present in excavations that are 4 feet or more deep, and within ______ feet of the employees.

25

Use a double-cleated ladder (with center rail) or 2 or more ladders when ladders are the only way to enter or exit a working area with ______ or more employees. 2 pts. [1]

25

When using a portable ladder for access to an upper landing surface, the side rails must extend at least ____ feet above the upper landing surface.

3

What are the four main types of electrical injuries

Burns Electrical shock Electrocution or death caused by electrical shock Falls

What is meant by "let-go" current?

Let-go current is an electrical current that is capable of freezing the muscles and paralyzing. Especially anything with a current over 10mA.

Describe a protective system an employer may construct to protect workers in excavations.

Shield-can be permanent or portable. Also known as trench box or trench shield. Shoring-such as metal hydraulic, mechanical or timber shoring system that supports the sides Sloping-form sides of an excavation that are inclined away from the excavation

List 2 key factors involved in designing a protective system for an excavation.

Soil type and weathering or water. Toxic fumes

What are the 3 basic types of scaffolds?

Suspended, supported, aerial lifts.

What is the greatest risk of an excavation ?

cave-ins

Steel erection work cannot begin until the ____________________ contractor authorizes it in writing.

controlling, general, or site GC

A ________________________ must be established prior to beginning construction of a masonry wall.

limited access zone, restricted access zone, or a controlled access zone

Flexible cords shall be used without

splices or tape; strain relief shall be provided