1. One major hazard of laser beams is:
(A) Inhalation of gas
(B) Electrical shock
(C) Eye damage
(D) Water spillage
2. High-power laser beams can cause:
(A) Hearing loss
(B) Hair loss
(C) Tooth decay
(D) Skin burns
3. Laser beams can cause temporary or permanent:
(A) Blindness
(B) Hearing loss
(C) Fractures
(D) Muscle cramps
4. Which of the following is a safety precaution when using lasers?
(A) Ignoring beam reflection
(B) Standing close to the beam without protection
(C) Looking directly at the laser
(D) Wearing protective goggles
5. Class 4 lasers are:
(A) Safe for direct viewing
(B) High-power and dangerous to eyes and skin
(C) Only for educational purposes
(D) Low intensity
6. A laser safety officer is responsible for:
(A) Only teaching laser theory
(B) Operating all laser machines
(C) Ignoring hazards
(D) Implementing safety protocols in laser labs
7. Reflected laser beams can be dangerous because:
(A) They are always harmless
(B) They can still cause eye or skin injury
(C) They lose coherence
(D) They become invisible
8. Protective eyewear for lasers must:
(A) Only cover the forehead
(B) Be any dark glasses
(C) Match the wavelength of the laser
(D) Be transparent
9. Class 1 lasers are considered:
(A) Used only in surgery
(B) Extremely hazardous
(C) Able to cause skin burns
(D) Safe under normal operating conditions
10. Avoiding direct eye exposure is necessary because:
(A) It only affects skin
(B) It is harmless
(C) Even brief exposure can damage the retina
(D) It improves beam accuracy
11. One precaution for industrial lasers is:
(A) Looking at the beam directly
(B) Wearing sandals
(C) Using beam enclosures
(D) Using reflective surfaces
12. Lasers can ignite flammable materials due to:
(A) High intensity of focused beams
(B) Low power
(C) Coherence only
(D) Monochromatic property
13. A laser hazard symbol indicates:
(A) Electrical shock only
(B) Safe usage
(C) Fire hazard only
(D) Risk of eye or skin injury
14. Safety measures for laser use in laboratories include:
(A) Allowing unrestricted access
(B) No safety protocol
(C) Ignoring reflections
(D) Restricted access and warning signs
15. Using reflective surfaces near lasers is dangerous because:
(A) It enhances laser safety
(B) It can redirect the beam toward eyes or skin
(C) It absorbs energy
(D) It diffuses light safely
16. Class 3B lasers are:
(A) Safe for all applications
(B) Hazardous to eyes and should not be viewed directly
(C) Used only in holography
(D) Only for demonstration
17. Avoid using lasers near flammable chemicals because:
(A) It is safe
(B) Beams can ignite materials
(C) It reduces beam intensity
(D) It improves coherence
18. Emergency procedures for laser accidents include:
(A) Turning off the laser and seeking medical help
(B) Ignoring exposure
(C) Looking directly at the beam
(D) Continuing experiments
19. Which of the following reduces accidental laser exposure?
(A) Beam shutters and interlocks
(B) Ignoring safety signs
(C) Wearing sunglasses only
(D) No precautions
20. Class 2 lasers are considered:
(A) Used only in industry
(B) High-power
(C) Dangerous for skin
(D) Low-power and safe for momentary eye exposure
21. Laser safety protocols include:
(A) Ignoring reflections
(B) Standing in the beam path
(C) Removing warning signs
(D) Wearing goggles, using shields, and limiting access
22. Which laser hazard is chemical in nature?
(A) No hazards exist
(B) All lasers are only optical hazards
(C) Laser light is always harmless
(D) Some gas lasers can release toxic gases
23. Skin exposure to high-power lasers can cause:
(A) Only mild warmth
(B) Burns and tissue damage
(C) No effect
(D) Hair growth
24. One precaution while using laser pointers is:
(A) Only point at animals
(B) Point at all directions freely
(C) Never point at eyes or reflective surfaces
(D) Use in open sunlight only
25. In laser laboratories, warning signs are used to:
(A) Decorate the lab
(B) Alert personnel about potential hazards
(C) Replace goggles
(D) None of the above
26. Training for laser safety is important because:
(A) It reduces laser efficiency
(B) It is optional
(C) Only for administrative staff
(D) It prevents accidents and injuries
27. Lasers can pose fire hazards because:
(A) High-power beams can ignite combustible materials
(B) All lasers are low-power
(C) Laser light is cold
(D) Polychromatic lasers are safe
28. Protective enclosures prevent hazards by:
(A) Scattering light
(B) Containing the beam within a controlled path
(C) Amplifying intensity
(D) Changing wavelength
29. Laser accidents are most likely to affect:
(A) Fingernails
(B) Hair
(C) Ears
(D) Eyes
30. One general precaution while working with lasers is:
(A) Never bypass safety interlocks
(B) Remove goggles
(C) Use reflective surfaces freely
(D) Ignore beam path