NEHA REHS RS EXAM REVIEW WORK SETS THREE LATEST ELABORATED ANSWERED 2026

NEHA REHS RS EXAM REVIEW WORK SETS
THREE LATEST ELABORATED ANSWERED 2026

◉ Which of the following have little penetrating power and are normally
a hazard to health only in the form of internal radiation received through
ingestion, inhalation, or open wounds?
A- X-rays
B- Alpha particles
C- Beta particles
D- Gamma rays Answer: B


◉ Beta radiation is MOST commonly blocked by which of the following
materials?
A- Lead
B- Concrete
C- Magnesium alloy
D- Glass or plastic Answer: D


◉ Microwaves are reflected by:
A- Metals
B- Plastics
C- Glass

, D- Polymers Answer: A


◉ The energy of ionizing radiation is measured in
A- Ergs of energy per gram.
B- One electrostatic unit
C- Electron volts (eV)
D- One-person sievert (Sv) Answer: C


◉ The term "frequency" cannot be described as
A- Waves
B- Particles
C- Vibrations
D- Oscillations Answer: B


◉ The shorter the wavelength, the
A- Higher the frequency and lower the energy.
B- Lower the frequency and energy.
C- Lower the frequency and higher the energy.
D- Higher the frequency and energy. Answer: D


◉ The roentgen is a measure of the ionization in air produced by
exposure to