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 Safety Interview Questions 5

41. What are the hazards in grinding work?
42. What is electrical hazard?
43. What is chemical hazard?
44. What are chemical agents?
45. What is flush point?
46. What is Fire?
47. How to inspect fire extinguisher?
48. What is LTEL?
49. What is STEL?
50. What is MSDS?
51. How to give work clearance to Service department?


41. What are the hazards in grinding work?

  • Electrical hazard
  • Health hazard
  • Fire hazard
  • Fall/ trip hazard

42. What is electrical hazard?

Failure of component of electrical system due to faulty design, faulty connection, and lack of repair & maintenance is called electrical hazard.

43. What is chemical hazard?

The hazard caused by chemical agents is called Chemical Hazard.

44. What are chemical agents?

Solid, Liquid, Gas, Fumes, Dust, Vapor, Mist, Fog, Smock

45. What is flush point?

The temperature at which the flammable liquids yield a sufficient amount of vapor to produce flam if a source of ignition is supplied close to the surface of liquid is called flush point.

46. What is Fire ?

Fire is a chemical reaction which produces heat, smoke and light.

There are three components of fire

  1. Fuel
  2. Heat
  3. Oxygen

If one of them is removed fire extinguishers
  • If fuel is removed, called starvation.
  • If heat is removed, called smothering.
  • If Oxygen is removed, called blanketing.
Fire expansion through
  • Conduction
  • Convection
  • Radiation
  • Direct contact
Classification of fire

Class A, i.e. solid like wood, paper, cloth etc.
Class B, i.e. liquid and gas like petrol, diesel, kerosene, grease, paint, LPG, Acetylene, and DA etc.
Class C, i.e. electrical fire
Class D, i.e. metal fire

Type of Fire Extinguishers
  1. Water Type
  2. Co2 Type
  3. DCP Type
  4. Foam Type

47. How to inspect fire extinguisher?

Fire extinguisher should be inspected monthly by user and yearly by third party.
There are some points which must be checked in fire extinguisher-
i. Type
ii. Container
iii. Placement
iv. Inspection tag
v. Validity
vi. Locking pin
vii. Seal
viii. Carrying handle
ix. Pressure gauge
x. Nozzle
xi. Operating lever
xii. Puncher lever
xiii. Valve
xiv. Hose

48. What is LTEL?

It stands for long term exposure limit. The maximum concentration of chemical to which workers are exposed continuously up to 8 hours without any danger to health, safety & work efficiency.

49. What is STEL?

It stands for short term exposure limit. The maximum concentration of chemical to which workers are exposed continuously up to 15 min without any danger to health, safety & work efficiency.

50. What is MSDS?

It stands for material safety data sheet. MSDS is a short technical report that explains how to use, handle and store chemicals safely.

51. How to give work clearance to Service department?

Work Clearance is a process used to ensure that all activities on site are undertaken with the knowledge and consent of the Shift In-charge who also is the permit issuer. 

The permit acceptor is responsible to check the site conditions and ensure the task to be done and the tools to be used safely integrate with the daily operations of the site and any other activity that is scheduled to take place.

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Thanks for reading - Safety Interview Questions 5
Naitik Patel
Industrial Guide

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