Practice Exam #3 48-60 Flashcards
A Roentgen (R) is the amount of gamma or x-rays required to produce ions resulting in a charge of .000258 coulombs/Kilogram in what medium?
Water
Rem is used to measure dose equivalent, or effective dose. For which two types of ionizing radiation is the dose equivalent the same as the absorbed dose for using the Rem as a measurement?
Beta and gamma
Deep Dose Equivalent (DDE) measures the eye dose at a tissue depth of 300 mg/cm. True or False?
False
The scattering of radiation in a thick shielding material is the reason you have to consider buildup factor. True or False?
True
In the event of a dose rate alarm on a dosimeter, which of the following questions should you ask the worker as you to determine the cause of the alarm.
- When the dosimeter alarmed where were you and what activities were you involved in?
- Were you leaning against anything at the time of the alarm?
- Did equipment operating in the area change while you were there.
Which of the following is not required to be a part of an RWP?
Tools required to do the work
Workers should acknowledge by signature or by using an electronic access system that they have read and understand the requirements of their RWP prior to entry. True or False?
True
You have been assigned to provide job coverage for a worker repairing a valve. The dose rate he is working in 40 mrem/hr. He works on the valve for 1 hour and
40 minutes. Upon exit from the area it is realized his dosimeter is broken and you are asked to estimate the amount of dose he received. Based on the dose rate and time in the area how much dose did the worker get?
40 mrem
Assuming a worker is required to exit the area at 80% of his dose limit established on the RWP, if the work area dose rate is 20 mrem/hr and his set point is 30 mrem, how long can he stay in the area?
1.2 hours
A General RWP should be used to control non-routine operations or work in areas with changing radiological conditions.
False
You have been assigned to provide job coverage for a work activity. The RWP says that a single dosimeter is required to be worn on the chest. During your
pre-job survey you identify a dose rate at the head area that is 200 mrem/hr. The dosimeter set point for the chest is 75 mrem/hr. What action should you take?
Stop the job and notify RP Supervision of the changes in conditions
