← Back to Junior Lab Assistant

Free Junior Lab Assistant Practice

Question 1 of 15

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

You're trying 15 free practice questions. Sign up to unlock the full question bank with detailed rationales and progress tracking.

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.

📋 Preview All 15 Practice Questions

Q1. 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

Q2. 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%

Q3. 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

Q4. A chemical container shows a warning symbol indicating "harmful/irritant". If the chemical concentration is 5% and the threshold limit for irritation is 3%, by what factor does the concentration exceed the irritation threshold?

  1. 1.5 times
  2. 0.6 times
  3. 2 times
  4. 3 times

Q5. 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

Q6. Compare the flammable material symbol with the oxidizing material symbol. Which statement correctly differentiates them?

  1. Both symbols show a flame, but the oxidizing symbol includes a circle under the flame
  2. The flammable symbol has a skull, while the oxidizing symbol has a flame
  3. The oxidizing symbol is a flame inside a diamond, identical to the flammable symbol
  4. The flammable symbol is a flame with a cross, the oxidizing symbol is a flame only

Q7. 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

Q8. Compare the hazard symbols for "flammable" and "oxidizing" substances. Which statement correctly distinguishes them?

  1. Flammable substances cause fire; oxidizing substances support combustion but are not themselves flammable
  2. Both symbols indicate the same hazard and can be used interchangeably
  3. Oxidizing substances are less dangerous than flammable substances
  4. Flammable substances cannot burn without oxidizing substances

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. Conceptually, why is it important to correctly identify toxic and poisonous substance symbols in a laboratory setting?

  1. To ensure proper storage and prevent accidental poisoning
  2. To increase the shelf life of chemicals
  3. To reduce the cost of chemical procurement
  4. To improve the color coding of laboratory equipment

Q11. Why is it important to recognize hazard and warning symbols on laboratory chemicals before handling them?

  1. To identify the chemical's color
  2. To understand the risks and take proper safety precautions
  3. To know the chemical's price
  4. To check the expiry date

Q12. Compare the hazard symbols for "flammable" and "oxidizing" substances. Which of the following statements is correct?

  1. Both symbols indicate substances that can cause explosions.
  2. Flammable substances burn easily; oxidizing substances support combustion but do not burn themselves.
  3. Oxidizing substances are less dangerous than flammable substances.
  4. Both symbols indicate corrosive properties.

Q13. 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

Q14. Which hazard symbol indicates that a chemical is corrosive and 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