CHEM 1LD EXAM QUESTIONS
ANSWERED CORRECTLY LATEST UPDATE
2026
**Q1: The most probable laboratory emergencies are chemical spills, minor burns and cuts, and fires.
Which statements are TRUE about responding to emergencies?**
**Answer:** (All choices)
- Stay calm
- If possible, turn off lab equipment before leaving lab for a fire alarm
- Know where the stairwells are
- All laboratories must have two exits
---
## SECTION 2: FLAMMABILITY & HAZARD COMMUNICATION
**Q2: Which common household products contain flammable chemicals?**
,**Answer:** gasoline, nail polish remover, antifreeze, rubbing alcohol
*(Bleach and liquid hand soap are NOT flammable)*
**Q3: Which are ways to stop a fire?**
**Answer:**
- Limit quantities of flammable substances in work area
- Remove ignition sources
- Place a beaker over a small flame to remove oxygen
- Ground metal container to prevent static electricity
**Q4: Which statements are TRUE about flammability?**
**Answer:**
- A fire cannot start above or below a vapor's flammability limits
- "Inflammable" is another word for "flammable"
**Q5: The National Fire Protection Association (NFPA) diamond has a ______ section for flammability. If
the number ______ appears, the chemical is extremely flammable. If the number ______ appears, the
chemical is a combustible (will catch fire when heated).**
**Answer:** red; 4; 2
, **Q6: The Global Harmonized System (GHS) symbol for flammability is a picture of a ______. If the
hazard category is ______, the chemical is extremely flammable. If the hazard category is ______, the
chemical is a combustible.**
**Answer:** fire; HC 1; HC 4
---
## SECTION 3: FUME HOODS
**Q7: Which statements are TRUE about fume hoods?**
**Answer:**
- Room air should be drawn into the fume hood
- The window on the front of the fume hood is called a **sash**
- All work should be done at least **6 inches inside** the hood
- A tissue paper held at the bottom of a sash should **blow into** the hood
---
## SECTION 4: GASES & INHALATION HAZARDS
ANSWERED CORRECTLY LATEST UPDATE
2026
**Q1: The most probable laboratory emergencies are chemical spills, minor burns and cuts, and fires.
Which statements are TRUE about responding to emergencies?**
**Answer:** (All choices)
- Stay calm
- If possible, turn off lab equipment before leaving lab for a fire alarm
- Know where the stairwells are
- All laboratories must have two exits
---
## SECTION 2: FLAMMABILITY & HAZARD COMMUNICATION
**Q2: Which common household products contain flammable chemicals?**
,**Answer:** gasoline, nail polish remover, antifreeze, rubbing alcohol
*(Bleach and liquid hand soap are NOT flammable)*
**Q3: Which are ways to stop a fire?**
**Answer:**
- Limit quantities of flammable substances in work area
- Remove ignition sources
- Place a beaker over a small flame to remove oxygen
- Ground metal container to prevent static electricity
**Q4: Which statements are TRUE about flammability?**
**Answer:**
- A fire cannot start above or below a vapor's flammability limits
- "Inflammable" is another word for "flammable"
**Q5: The National Fire Protection Association (NFPA) diamond has a ______ section for flammability. If
the number ______ appears, the chemical is extremely flammable. If the number ______ appears, the
chemical is a combustible (will catch fire when heated).**
**Answer:** red; 4; 2
, **Q6: The Global Harmonized System (GHS) symbol for flammability is a picture of a ______. If the
hazard category is ______, the chemical is extremely flammable. If the hazard category is ______, the
chemical is a combustible.**
**Answer:** fire; HC 1; HC 4
---
## SECTION 3: FUME HOODS
**Q7: Which statements are TRUE about fume hoods?**
**Answer:**
- Room air should be drawn into the fume hood
- The window on the front of the fume hood is called a **sash**
- All work should be done at least **6 inches inside** the hood
- A tissue paper held at the bottom of a sash should **blow into** the hood
---
## SECTION 4: GASES & INHALATION HAZARDS
