CHST CHST - Construction Health and Safety Technician Hazardous Materials and Chemical Safety Questions and Answers 5

Question 1

A construction site stores 500 gallons of diesel fuel in a single aboveground tank. Under EPA's Spill Prevention, Control, and Countermeasure (SPCC) rule, what is the MINIMUM secondary containment volume typically required?

Accepted Answer

110% of the tank's capacity

Answer

EPA's SPCC rule (40 CFR Part 112) generally requires secondary containment capable of holding 110% of the volume of the largest single tank to contain a full spill plus precipitation.

Question 2

Which exposure route is MOST significant for lead exposure on construction sites involving lead-based paint removal?

Accepted Answer

Ingestion via hand-to-mouth contact

Answer

On construction sites, lead ingestion through hand-to-mouth contact (e.g., eating, drinking, or smoking without washing hands) is the primary route of entry for lead dust and fume particles.

Question 3

Under OSHA 29 CFR 1926.65 (HAZWOPER), workers performing hazardous waste site clean-up operations must receive how many hours of initial training before working on-site unsupervised?

Accepted Answer

40 hours

Answer

OSHA's HAZWOPER standard at 29 CFR 1926.65(e)(3) requires a minimum of 40 hours of off-site training plus 3 days of supervised field experience for general site workers.

Question 4

When using a chemical that has a flash point of 73°F (23°C) and a boiling point above 95°F (35°C), it is classified as a:

Accepted Answer

Flammable liquid (Category 2)

Answer

Under GHS/HazCom 2012, a flammable liquid with a flash point ≥23°C and ≤60°C and a boiling point >35°C is classified as Category 2 flammable liquid.

Question 5

A CHST notices workers using spray-applied coatings containing silica in an enclosed space without respiratory protection. The MOST appropriate corrective action is to:

Accepted Answer

Stop work immediately, evacuate the space, and implement engineering controls and proper respiratory protection before resuming

Answer

Respirable crystalline silica causes silicosis and lung cancer; OSHA's silica standard (29 CFR 1926.1153) requires immediate controls including stopping work if workers are exposed above the action level without protection.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST CHST - Construction Health and Safety Technician Hazardous Materials and Chemical Safety Questions and Answers 5