CIH Physical Agents: Noise and Radiation 5

Question 1

Hand-arm vibration syndrome (HAVS) is a condition primarily caused by:

Accepted Answer

Regular use of vibrating hand tools such as grinders and jackhammers

Answer

HAVS results from chronic use of vibrating hand tools, causing vascular, neurological, and musculoskeletal damage to the hands and arms.

Question 2

Which of the following correctly describes the ALARA principle as it applies to ionizing radiation protection?

Accepted Answer

Exposures must be as low as reasonably achievable, economic and social factors considered

Answer

ALARA (As Low As Reasonably Achievable) requires reducing radiation exposures below regulatory limits while considering economic and social factors.

Question 3

What is the primary difference between ionizing and non-ionizing radiation?

Accepted Answer

Ionizing radiation has sufficient energy to remove electrons from atoms; non-ionizing does not

Answer

Ionizing radiation carries enough energy to eject electrons from atoms, creating ions that can damage DNA and biological molecules.

Question 4

A worker is exposed to radiofrequency (RF) radiation from a radar antenna. What is the primary concern at high RF exposure levels?

Accepted Answer

Thermal heating of body tissues

Answer

High-level RF radiation exposure primarily causes tissue heating (dielectric and resistive heating), which can damage eyes and testes that have limited blood-cooling capacity.

Question 5

When calculating a time-weighted average (TWA) noise exposure, an IH uses a sound level meter to take area readings at 88, 92, and 96 dBA. Which tool is more appropriate for determining personal TWA?

Accepted Answer

Dosimeter worn by the worker throughout the shift

Answer

A personal noise dosimeter worn by the worker captures actual exposure including all worker movement and activities, providing the most accurate personal TWA.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH Physical Agents: Noise and Radiation 5