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A chemical container has a label with a skull and crossbones symbol and a volume of 500 ml. If the lethal dose for a person is 50 ml of this chemical, how many lethal doses does the container hold?

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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. A chemical container has a label with a skull and crossbones symbol and a volume of 500 ml. If the lethal dose for a person is 50 ml of this chemical, how many lethal doses does the container hold?

  1. 5 lethal doses
  2. 10 lethal doses
  3. 50 lethal doses
  4. 100 lethal doses

Q2. 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

Q3. 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

Q4. 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

Q5. Conceptually, why is it important to recognize and understand hazard symbols in a laboratory setting?

  1. To decorate the laboratory with colorful signs
  2. To identify the chemical's manufacturer
  3. To ensure proper handling and prevent accidents
  4. To know the chemical's price and availability

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 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

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 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

Q10. 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

Q11. 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

Q12. 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

Q13. Which hazard symbol indicates that a chemical is corrosive and can cause damage to skin and metals?

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

Q14. 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

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