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NEBOSH EXAM WITH ALL QUESTIONS AND ANSWERS
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NEBOSH EXAM WITH ALL QUESTIONS AND ANSWERS
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NEBOSH EXAM WITH ALL QUESTIONS ANDANSWERS
What are the 5 steps in a risk assessment? - ANSWER 1. Look for the hazards
2. Decide who might be harmed and how
3. Evaluate the risks
4. Record the significant findings
5. Review the assessment and revise it if necessary
What is the hierarchy of risk control? - ANSWER a) eliminate the hazard
b) substitute with less hazardous materials, processes, operations or equipment
c) use engineering controls
d) use safety signs, markings and warning devices and administrative controls
e) use personal protective equipment
Give examples of sources of ignition in a typical construction site. - ANSWER
Naked flames
External sparks
Internal sparking
Hot surfaces
Static electricity
What are the 5 classifications of fire and how are they extinguished?
How are electrical fires extinguished? - ANSWER Class A: solid materials eg paper
or wood
Extinguished by cooling using water (red)
Class B: liquids or liquefied solids eg paint, oil or fats
B1: liquids soluble in water eg methanol.
Extinguished by CO2 (black) and dry powder (blue)
B2: liquids not soluble in water eg petrol and oil.
Extinguished by foam (cream), CO2, dry powder
Class C: gases eg butane and propane.
Extinguished by dry powder
Class D: fires involving metals eg aluminium or magnesium.
Extinguished by special dry powders eg containing graphite
Class F: cooking oil or fat in catering.
Extinguished with yellow extinguisher
Electrical fires are extinguished by CO2 or dry powder.
What are the 4 ways heat can be transmitted? - ANSWER Convection
Conduction
Radiation
, Direct burning
What are common causes of fire on a construction site? - ANSWER - activities
creating flammable dust
- loose packaging
- poor storage
- flammable residues
- buried services
- poor disposal
- overheating
- improper use of welding or cutting equipment
- overloaded electrical equipment
- damaged cables, improper fuses
- bonfires getting out of control
- arson
What are the 5 main hazards produced by fire? - ANSWER Oxygen depletion
Flames and heat
Smoke
Gaseous combustion products
Structural failure of buildings
What are the duties placed on the client under CDM? - ANSWER - make
arrangements for managing a project to ensure that construction work is carried out
safely sfairp
- Ensure the welfare requirements in Schedule 2 are complied with
- Appoint in writing a PD and PC. If the client does not appoint a PD, the client must
fulfil the duties of the PD.
- Take reasonable steps to ensure that the arrangements are maintained and
reviewed throughout the project
- provide PCI to every designer and contractor appointed or being considered for
appointment
- Ensure before the construction phase begins that the PC draws up a CPP
- ensure that the PD prepares an appropriate H&S file for the project
- Ensure that the PD complies with their duties under Regulations 11 and 12
- Ensure that the PC complies with Regulations 12 to 14
What is a WEL? - ANSWER Related to the concentration of airborne hazardous
substances that people breathe over a specified period of time - known as 'time-
weighted average'.
Give examples of sources of ionising radiation. - ANSWER Nuclear reactors
Used for scientific research
X-rays in hospitals
Smoke detectors
Naturally eg radon in Devon
Give examples of sources of non-ionising radiation. - ANSWER Sunlight
Arc welding
Laser
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