HEALTH PHYSICS BLOCK 5 QUIZ (LATEST UPDATE) REAL
QUESTIONS AND VERIFIED ANSWERS |100% CORRECT |
ALREADY GRADED A
if the true exposure rate is 10 mrem/hr and the exposure rate indicated
on your detector is 15 mrem/hr, does this detector meet the regulatory
requirements? Ans✓✓✓[5/10]*100 = 50%
over 20% so it does not meet requirements
if an ionization chamber is operated correctly, the current (charge per
unit time) flowing through the meter circuit will be directly proportional
to which of the following Ans✓✓✓energy deposited by ionizing
radiation in the gas per unit time
what radiation can't be detected using a portable ionization chamber
survey instrument? Ans✓✓✓alpha
detectors used for exposure rate surveys must indicate exposures within
_____% of the true exposure rate Ans✓✓✓20%
T/F: For a given amount of energy deposited in an ionization chamber,
the number of ions collected by electrodes is essentially constant as a
function of the operating voltage of the detector Ans✓✓✓True
T/F: Ionization chamber detectors are useful for detecting very low
radiation levels at or near background Ans✓✓✓False
, What is a gas detector that uses the process of gas multiplication
(increased detector voltage) to amplify a detector's signal by creating
additional ion pairs? Ans✓✓✓GM Detector
detector efficiency is the response of a detector in terms of counts per
minute per unit source activity (disintegrations/minute). detector
efficiency depends on what Ans✓✓✓radiation type (alpha, beta,
gamma)
radiation energy
detector medium (gas, liquid, solid, Z-value, density)
source-detector exposure geometry
at higher count rates, counts can be lost due to unavoidable detector
electronics issues. what is the time when a detector is unable to respond
to radiation because it has not yet received from the previous event?
Ans✓✓✓dead time
if insufficient voltage is applied to the electrodes of an ionization
chamber, what will happen? Ans✓✓✓a significant portion of the ions
created by radiation will recombine before reaching the electrodes
a dose calibrator used to measure activity in nuclear medicine is an
example of? Ans✓✓✓ionization chamber
basic function of PM tubes Ans✓✓✓converting light (photons) into a
measurable electrical (electron) pulse
QUESTIONS AND VERIFIED ANSWERS |100% CORRECT |
ALREADY GRADED A
if the true exposure rate is 10 mrem/hr and the exposure rate indicated
on your detector is 15 mrem/hr, does this detector meet the regulatory
requirements? Ans✓✓✓[5/10]*100 = 50%
over 20% so it does not meet requirements
if an ionization chamber is operated correctly, the current (charge per
unit time) flowing through the meter circuit will be directly proportional
to which of the following Ans✓✓✓energy deposited by ionizing
radiation in the gas per unit time
what radiation can't be detected using a portable ionization chamber
survey instrument? Ans✓✓✓alpha
detectors used for exposure rate surveys must indicate exposures within
_____% of the true exposure rate Ans✓✓✓20%
T/F: For a given amount of energy deposited in an ionization chamber,
the number of ions collected by electrodes is essentially constant as a
function of the operating voltage of the detector Ans✓✓✓True
T/F: Ionization chamber detectors are useful for detecting very low
radiation levels at or near background Ans✓✓✓False
, What is a gas detector that uses the process of gas multiplication
(increased detector voltage) to amplify a detector's signal by creating
additional ion pairs? Ans✓✓✓GM Detector
detector efficiency is the response of a detector in terms of counts per
minute per unit source activity (disintegrations/minute). detector
efficiency depends on what Ans✓✓✓radiation type (alpha, beta,
gamma)
radiation energy
detector medium (gas, liquid, solid, Z-value, density)
source-detector exposure geometry
at higher count rates, counts can be lost due to unavoidable detector
electronics issues. what is the time when a detector is unable to respond
to radiation because it has not yet received from the previous event?
Ans✓✓✓dead time
if insufficient voltage is applied to the electrodes of an ionization
chamber, what will happen? Ans✓✓✓a significant portion of the ions
created by radiation will recombine before reaching the electrodes
a dose calibrator used to measure activity in nuclear medicine is an
example of? Ans✓✓✓ionization chamber
basic function of PM tubes Ans✓✓✓converting light (photons) into a
measurable electrical (electron) pulse
