NEBOSH Physical Hazards

Question 1

Under the Control of Noise at Work Regulations 2005, what is the lower exposure action value?

Accepted Answer

80 dB(A) daily or weekly personal noise exposure

Answer

75 dB(A)

Answer

85 dB(A)

Answer

90 dB(A)

Question 2

What is the difference between Hand-Arm Vibration (HAVs) and Whole-Body Vibration (WBV)?

Accepted Answer

HAVs affects the fingers, hands and arms from hand-held vibrating tools, while WBV affects the whole body transmitted through the seat or feet from vehicles or machinery on which a worker stands or sits

Answer

There is no difference, they are the same hazard

Answer

HAVs only occurs outdoors, WBV only occurs indoors

Answer

HAVs causes hearing loss, WBV causes skin problems

Question 3

What is the key difference between ionising and non-ionising radiation?

Accepted Answer

Ionising radiation has enough energy to remove electrons from atoms (causing ionisation) and can damage DNA, while non-ionising radiation has lower energy and causes effects mainly through heating

Answer

Ionising radiation is always artificial, non-ionising is always natural

Answer

Non-ionising radiation is more dangerous than ionising radiation

Answer

Ionising radiation is visible light, non-ionising is ultraviolet

Question 4

Under the Electricity at Work Regulations 1989, what does 'isolation' mean in the context of electrical safety?

Accepted Answer

The disconnection and separation of electrical equipment from every source of electrical energy in such a way that the disconnection and separation is secure

Answer

Working alone in a room with electrical equipment

Answer

Placing insulating tape over exposed wires

Answer

Wearing rubber-soled shoes near electrical panels

Question 5

What health condition is most commonly associated with prolonged exposure to hand-arm vibration?

Accepted Answer

Vibration white finger (VWF) and Hand-Arm Vibration Syndrome (HAVS), causing blanching of fingers, numbness, tingling, and reduced grip strength

Answer

Hearing loss

Answer

Skin cancer

Answer

Repetitive strain injury in the shoulders

Question 6

The Pressure Systems Safety Regulations 2000 (PSSR) require a written scheme of examination for pressure systems. Who must prepare this scheme?

Accepted Answer

A competent person — typically a specialist engineer from an insurance inspection body

Answer

The equipment operator

Answer

The employer's HR department

Answer

The equipment manufacturer only