Please help me solve these $16$ questions. Solve all from $1-16.$

Question $1-$ Which of the following items is the responsibility of industrial hygienists that the Code of Ethics of the American Academy of Industrial Hygiene described?

A$-$ To ensure the health of employees;

B$-$ To maintain an objective approach in recognizing, assessing, controlling, and preventing health hazards regardless of outside pressure and influence;

C$-$ To help employees understand the precautions that they should take to avoid health problems;

D$-$ A and B are correct;

E$-$ All of the above are correct.

Question $2-$ Large companies often employ professionals who specialize in industrial hygiene. These specialists have a title as:

A$-$ Occupational physician;

B$-$ Industrial toxicologist;

C$-$ Industrial physicist;

D$-$ A or B;

E$-$ All of the above

Question $3-$ To comply with the OSHA Process Safety Standard, $29$ CFR $1910\mathrm{.}119,$ companies must have written operating procedures, mechanical integrity programs, and formal incident investigation procedures.

A$-$ True

B$-$ False

Question $4-$ Which of the following statements is correct regarding to OSHA Regulation for Chemical Spills?

A$-$ The standard, $29$ CFR $1910\mathrm{.}120,$ is a special regulation for chemical spills;

B$-$ The standard, $29$ CFR $1910\mathrm{.}120,$ is also called HAZWOPER;

C$-$ The standard, $29$ CFR $1910\mathrm{.}120,$ gives organizations only one way for responding to a chemical spill;

D$-$ A and B are correct;

E$-$ All of the above are correct.

Question $5-$ According to the Environmental Protection Agency $($EPA$),$ how many amounts of toxic substances will be placed in treatment and disposal facilities?

A$-2\mathrm{.}3$ billion pounds;

B$-910$ million pounds;

C$-550$ million pounds;

D$-$ A and B are correct;

E$-$ None of the above is correct.

Question $6-$ Hazards that include noise, vibration, extremes of temperature, and excessive radiation are categorized as:

A$-$ Chemical hazards;

B$-$ Physical hazards;

C$-$ Biological hazards;

D$-$ Ergonomic hazards;

E$-$ None of the above is correct.

Question $7-$ The most common routes of entry for toxic agents in order $($from the most to least$)$ are:

A$-$ Ingestion $>$ Injection $>$ Skin absorption $>$ Inhalation;

B$-$ Inhalation $>$ Injection $>$ Skin absorption $>$ Ingestion ;

C$-$ Inhalation $>$ Injection $>$ Ingestion $>$ Skin absorption;

D$-$ Inhalation $>$ Skin absorption $>$ Injection $>$ Ingestion;

E$-$ None of the above is correct.

Question $8-$ Mercury mostly endangers the kidneys.

A$-$ True

B$-$ False

Question $9-$ Which of the following statements is correct regarding to airborne contaminants?

A$-$ The most common types of airborne contaminants are dusts, fumes, smoke, aerosols, mists, gases, and vapors;

B$-$ Each type of contaminant has a specific definition;

C$-$ It is important to understand the different types of airborne contaminants that may be present in the workplace;

D$-$ A and B are correct;

E$-$ All of the above are correct.

Question $10-$ Following is a list of $4$ common types of airborne contaminants: dusts, fumes, smoke, and gasses. The most common contaminant in order $($from the most to least$)$ are:

A$-$ Dust $>$ fume $>$ smoke $>$ gases;

B$-$ Fume $>$ smoke $>$ dust $>$ gases;

C$-$ Smoke $>$ dust $>$ fume $>$ gases;

D$-$ Gases $>$ smoke $>$ fume $>$ dust;

E$-$ None of the above is correct.

Question $11-$ The EPA estimates that approximately $50\%$ of the commercial buildings in use today contain asbestos in some form.

A$-$ True

B$-$ False

Question $12-$ In which year the EPA bans the use of asbestos in the United States?

A$-1967$;

B$-1979$;

C$-1989$;

D$-1992$;

E$-$ None of the above.

Question $13-$ Which of the following statements is NOT correct regarding to indoor air quality and $$sick$-$building$$ syndrome?

A$-$ The EPA estimates that as many as $30$ percent of the buildings in the United States have air quality problems;

B$-$ Health problems commonly associated with poor indoor air quality include allergic reactions, respiratory problems, eye irritation, sinusitis$,$ bronchitis, and pneumonia;

C$-$ ANSI Z$9\mathrm{.}8$ is a standard developed by The American National Standard Institute for indoor air quality;

D$-$ A and C;

E$-$ None of the above.

Question $14-$ PPE imposes a barrier between the worker and the hazard but does nothing to reduce or eliminate the hazard.

A$-$ True

B$-$ False

Question $15-$ Which of the following agencies$$ research is mainly focused on toxic levels and human tolerance levels of hazardous substances, and it prepares recommendations for OSHA standards dealing with hazardous substances?

A$-$ American Industrial Hygiene Association;

B$-$ The National Institute for Occupational Safety and Health $($NIOSH$)$;

C$-$ American Society of Safety Engineers;

D$-$ Occupational Safety and Health Administration;

E$-$ None of the above.

Question $16-$ In testing the atmosphere, what safe oxygen level has been specified by OSHA Confined Space Standard?

A$-19\mathrm{.}5\%<$ safe oxygen level $<23\mathrm{.}5\%$;

B$-18\mathrm{.}5\%<$ safe oxygen level $<23\mathrm{.}5\%$;

C$-19\mathrm{.}5\%<$ safe oxygen level $<24\mathrm{.}5\%$;

D$-18\mathrm{.}5\%<$ safe oxygen level $<24\mathrm{.}5\%$;

E$-$ None of the above.