again. 12/3/25) Questions with expert
solutions ( 100% accurate )
Why was asbestos added to construction materials ? - answer It
was a great insulator and binder. It added strength and durability
against weathering and use. It was non-corrosive, did not conduct
electricity, and made spray-on products easier to apply.
What are the two classes of asbestos and their associated types? -
answer The two classes of asbestos are Serpentine and
Amphiboles.
Serpentine consists of one type: Chrysotile.
Amphiboles consists of five types: Amosite, Crocidolite,
Anthophyllite, Tremolite, Actinolite.
Of the different types of Amphiboles, which types were most
commonly used commercially? - answer Amosite and Crocidolite
What is the predominant color and structure of Chrysotile
asbestos ? - answer white , long , curly , hollow
What is the predominant color and structure of Amosite
asbestos ? - answer brown / tan ; long and straight
What is the predominant color and structure of Crocidolite ? -
answer blue ; long and straight
,What is the definition of a Surfacing Material? - answer means
material that is sprayed-on, troweled-on, or otherwise applied to
surfaces, such as acoustical plaster on ceilings and fireproofing
materials on structural members, or other materials on surfaces
for acoustical, fireproofing, or other purposes.
What is the definition of Thermal Systems Insulation (TSI)? -
answer means material applied to pipes, fittings, boilers,
breeching, tanks, ducts, or other interior structural components to
prevent heat loss or gain, or water condensation, or for other
purposes.
What is the definition of a Miscellaneous Material? - answer
means interior building material that is not surfacing material or
thermal system insulation.
What is the definition of Friable? - answer means that material,
when dry, may be crumbled, pulverized, or reduced to powder by
hand pressure, and includes previously nonfriable materials after
such previously nonfriable material becomes damaged to the
extent that when dry it may be crumbled, pulverized, or reduced
to powder by hand pressure.
What is the primary type of asbestos used in the U.S ? - answer
Chrysotile.
List three building materials / locations where ACM is likely to be
found - answer There are over 3000 building products that may
contain asbestos. A limited list of examples are: taping mud,
,flooring mastics/adhesives, popcorn ceilings, fireproofing, vinyl
floor tiles, sheet flooring backing, transite, fire doors, fume hoods,
felt under roofs or siding, kiln bricks and cement, lab equipment,
fire safety equipment, auditorium curtains, gaskets, vibration
joints, HVAC duct tape, and many many more.
What are the 3 major diseases related to asbestos exposures ? -
answer Asbestosis, Lung Cancer, Mesothelioma.
What is a latency period ? What is the latency period for asbestos
related illnesses ? - answer The time between exposure to
asbestos and the time symptoms appear. 10-40 years.
What asbestos-related disease normally appears only after
prolonged, heavy, occupational exposure to asbestos ? - answer
Asbestosis
What asbestos related disease primarily affects those exposed to
asbestos who smoke cigarettes? - answer Lung cancer. There is a
synergistic effect that increases the workers chances of getting
lung cancer over 50 times.
Who must participate in a medical surveillance program? - answer
8 CCR1529 (m) (1).
A. The employer shall institute a medical surveillance program for
all employees who, for a combined total of 30 or more days per
year, are engaged in Class I, II, and III work or are exposed at or
above the permissible exposure limit. For purposes of this
paragraph, any day in which a worker engages in Class II or Class
III operations or a combination thereof on intact material for one
, hour or less (taking into account the entire time spent on the
removal operation, including cleanup) and, while doing so,
adheres fully to the work practices specified in this standard, shall
not be counted.
B. For employees otherwise required by this standard to wear a
negative pressure respirator, employers shall ensure employees
are physically able to perform the work and use the equipment.
This determination shall be made under the supervision of a
physician.
When are asbestos medical surveillance physical exams
required ? - answer 1. Prior to assignment of the employee to an
area where negative- pressure respirators are worn;
2. When the employee is assigned to an area where exposure to
asbestos may be at or above the permissible exposure limit for 30
or more days per year, or engage in Class I, II or III work for a
combined total of 30 or more days per year, a medical
examination must be given within 10 working days following the
thirtieth day of exposure;
3. And at least annually thereafter.
4. If the examining physician determines that any of the
examinations should be provided more frequently than specified,
the employer shall provide such examinations to affected
employees at the frequencies specified by the physician.