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Which symbol is used to indicate that a chemical is flammable?

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Free Junior Lab Assistant Practice Questions

Kerala Public Service CommissionRecruitment for Junior Lab Assistant in Medical Education Department, Kerala Government Service.Direct RecruitmentAge Limit: 18-36 years

Try 15 free syllabus-aligned practice questions for the Junior Lab Assistant exam. Each question includes instant feedback so you can learn as you go. No sign-up required.

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Q1. Which symbol is used to indicate that a chemical is flammable?

  1. A flame icon inside a diamond
  2. A skull and crossbones
  3. An exclamation mark
  4. A test tube pouring liquid on a hand

Q2. Compare the hazard symbols for "flammable" and "oxidizing" substances. Which statement correctly distinguishes their risks?

  1. Flammable substances support combustion; oxidizing substances can cause or intensify fire
  2. Both symbols indicate the same hazard and can be used interchangeably
  3. Oxidizing substances are always safe to handle without precautions
  4. Flammable substances do not burn but explode on contact with air

Q3. Which symbol is used to indicate a toxic substance that can cause serious health hazards or death upon exposure?

  1. Flammable symbol
  2. Skull and crossbones symbol
  3. Corrosive symbol
  4. Explosive symbol

Q4. Conceptually, why is it important to recognize the flammable material symbol in a laboratory setting?

  1. To ensure proper storage away from ignition sources
  2. To identify chemicals that are safe to drink
  3. To know which chemicals are non-reactive
  4. To determine the chemical's color

Q5. Calculate the percentage of chemicals labeled with the "toxic" symbol if a laboratory has 50 chemicals, out of which 12 are labeled toxic, 15 flammable, 8 corrosive, and the rest are non-hazardous.

  1. 24%
  2. 30%
  3. 20%
  4. 18%

Q6. A chemical bottle shows a hazard symbol indicating "harmful" with an exclamation mark. If a lab assistant accidentally spills 50 ml on their skin, what is the best immediate response?

  1. Wash the affected area with plenty of water immediately
  2. Ignore it as the chemical is only harmful if ingested
  3. Cover the area with a bandage without washing
  4. Apply an acid neutralizer

Q7. A lab assistant notices a container labeled with a flammable material symbol. Which of the following actions is the safest immediate step?

  1. Store the container near a heat source for quick access
  2. Place the container in a designated flammable storage cabinet
  3. Open the container to check the chemical's smell
  4. Pour the chemical into a glass beaker for easier use

Q8. A laboratory assistant notices a chemical container labeled with a skull and crossbones symbol. What immediate action should they take?

  1. Wear protective gloves and avoid inhaling fumes
  2. Store the chemical in direct sunlight
  3. Mix it with water immediately
  4. Dispose of it in the regular trash

Q9. A laboratory assistant finds a container labeled with a skull and crossbones symbol. What immediate safety action should they take before handling the chemical?

  1. Wear appropriate personal protective equipment (PPE) and handle with extreme caution
  2. Store the container in direct sunlight to neutralize it
  3. Dilute the chemical with water before use
  4. Ignore the symbol and proceed as usual

Q10. In a laboratory, you find a container labeled with a skull and crossbones symbol. What precautionary action should you take before handling it?

  1. Wear heat-resistant gloves
  2. Avoid inhalation and use protective gloves and goggles
  3. Keep away from open flames
  4. Store in a well-ventilated area only

Q11. A laboratory assistant finds a container labeled with a skull and crossbones symbol. What is the best immediate action to take before handling the chemical?

  1. Wear appropriate personal protective equipment (PPE) and read the safety data sheet (SDS)
  2. Open the container to check the chemical's smell
  3. Store the container near flammable chemicals for quick access
  4. Ignore the symbol if the container is sealed

Q12. A laboratory chemical container shows a symbol with a flame over a circle. What does this symbol represent, and what is the primary hazard associated with it?

  1. Flammable; risk of catching fire easily
  2. Oxidizing; can cause or intensify fire and explosion
  3. Explosive; risk of sudden explosion
  4. Compressed gas; risk of container rupture

Q13. Compare the toxic substance symbol with the corrosive substance symbol. Which of the following statements is true?

  1. Both symbols indicate substances that cause immediate death upon contact
  2. The toxic symbol warns about poisoning, while the corrosive symbol warns about chemical burns
  3. The corrosive symbol is used for flammable liquids, toxic symbol for gases
  4. Both symbols are interchangeable and mean the same hazard

Q14. Which common laboratory hazard symbol indicates the presence of a substance that can cause severe skin burns and eye damage?

  1. Flammable
  2. Corrosive
  3. Toxic
  4. Explosive

Q15. If a flammable liquid has a flash point of 25°C, what does this imply about its hazard level in a typical laboratory environment maintained at 22°C?

  1. It will not ignite because the temperature is below the flash point
  2. It can ignite if heated slightly above room temperature
  3. It is safe to use without precautions at room temperature
  4. It is non-flammable at any temperature below 100°C
Free Junior Lab Assistant Practice Questions | Kerala PSC Prep