Free Certified Industrial Hygienist (CIH) MCQ Questions and Answers

Question 1

The beta, gamma, and x-rays are measured with this instrument:

Accepted Answer

Geiger-Muller

Answer

The Geiger-Muller counter, commonly known as a Geiger counter, is a standard instrument used for detecting and measuring ionizing radiation. It is particularly effective at identifying the presence of beta particles, gamma rays, and x-rays. The instrument works by detecting the ionization events caused by these types of radiation within a gas-filled tube.

Question 2

A radiation accumulation measurement film badge is known as a:

Accepted Answer

Dosimeters

Answer

A dosimeter is a device specifically designed to measure an individual's accumulated dose of ionizing radiation over a period. Film badges are a common type of passive dosimeter that contain photographic film, which darkens proportionally to the radiation exposure received. This provides a cumulative record of the radiation dose absorbed by the wearer.

Question 3

Which of the following methods for reducing or removing exposure to occupational health risks is most effective?

Accepted Answer

Administrative controls

Answer

Administrative controls involve implementing policies, procedures, and work practices that reduce exposure to hazards, such as limiting time in hazardous areas, job rotation, or developing safe work procedures. These controls directly manage how workers interact with the hazard, effectively minimizing exposure duration or intensity. In many scenarios, especially when engineering controls are not fully feasible or sufficient, well-designed administrative controls can be the most practical and effective means to significantly reduce or remove occupational health risks.

Question 4

Paper cannot be penetrated by this radiation because it is so faint.

Accepted Answer

alpha-particles

Answer

Alpha particles are the least penetrating type of ionizing radiation due to their relatively large mass and charge. They consist of two protons and two neutrons, causing them to interact readily with matter and lose energy quickly. Consequently, alpha particles can be effectively stopped by a simple sheet of paper, the outer layer of human skin, or even a few centimeters of air.

Question 5

Which two consequences can be arbitrarily separated from a substance's action?

Accepted Answer

acute and chronic

Answer

The consequences of exposure to a substance can be broadly categorized into acute and chronic effects. Acute effects manifest rapidly after a short-term, often high-level exposure, while chronic effects develop slowly over a prolonged period due to repeated or long-term exposure, typically at lower levels. These two classifications help differentiate the onset and duration of health impacts from occupational exposures.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

Free Certified Industrial Hygienist (CIH) MCQ Questions and Answers