MOCK EXAM: RADIATION THERAPY BOARDS || 100%
ACCURATE ANSWERS.
What is the most common side effect associated with cytotoxic drugs? correct answers
myelosuppression
What is an evaluation of a tumor in terms of degree of cellular differentiation? correct answers
Grade
According to Bergonie and Tribondeau, factors that may influence the sensitibity of a group of
cells to ionizing radiation are:
1. mitotic activity
2. time of cell division
3. cellular differentiation
4. length of mitotic activity
a. 1,2
b. 2,3
c. 1,3,4
d. 1,2,3,4 correct answers C
Prophylatic therapy is intended to:
a. relieve pain
b. heal/stall ulceration, fungation or fracture
c. improve the quality of life
d. sterilize areas of microscopic disease correct answers D
The Negative side of the basic x-ray tube is known as the:
,a. anode
b. cathode
c. filament
d. vacuum correct answers B
If a 50 keV electron collides w. an inner shell e- w. a binding energy of 25keV, the resulting
photoelectron will have an energy of :
a. 25 keV
b. 75 keV
c. 100 keV
d. 150 keV correct answers a (50keV-25keV = 25keV)
A photon of 25 A has a kinetic energy of ____keV.
a. 0.489
b. 1.82
c. 0.496
d. 0.688 correct answers C (E=12.4/lamda; E=12.4/25A = .0496 keV)
If using a tungsten target, the fraction of 4 MeV electrons converted to photons is what?
a. 10.36%
b. 12.84%
c. 11.36%
d. 9.87% correct answers A (tungsten atomic number(Z) is 74, max energy of electron = E, use
formula F=3.5x10^-4 (Z) (E) to find answer)
,The probability of a photoelectric interaction _____ with increasing energies and _____ with the
atomic number of the medium. correct answers decrease, increase
After alpha decay, the daughter nuclide will have an atomic mass number___ amu lower than the
parent.
a. 1
b. 2
c. 4
d. 6 correct answers C
An atom is neutral if the # of its e- is equal to its:
a. protons
b. nucleons
c. atomic weight
d. none of the above correct answers A
Solve for lambda in hours^-1
A=5mCi
A0=18mCi
t=50 hours
a. 0.0335 hrs^-1
b. 0.00256 hrs^-1
c. 0.0256 hrs^-1
d. 0.588 hrs^-1 correct answers C
, 2 or more chemicals w/ the same chemical formula, but different nuclear states are known as:
a. isomers
b. isotopes
c. isobars
d. isotones correct answers B
Which of the following is not true about the electromagnetic spectum?
They all have the SAME _____.
a. velocity
b. energy
c. mass
d. charge correct answers B
Radon has a T1/2 = 3.83 days . what is the average life?
a. 3.83 d
b. 4.4 d
c. 5.5 d
d. 6.6 d correct answers C (Ta=T1/2/0.693)
Carbon-14 and nitrogen-14 are
a. isotones
b. isotopes
c. isobars
d. isomers correct answers C (same mass)
ACCURATE ANSWERS.
What is the most common side effect associated with cytotoxic drugs? correct answers
myelosuppression
What is an evaluation of a tumor in terms of degree of cellular differentiation? correct answers
Grade
According to Bergonie and Tribondeau, factors that may influence the sensitibity of a group of
cells to ionizing radiation are:
1. mitotic activity
2. time of cell division
3. cellular differentiation
4. length of mitotic activity
a. 1,2
b. 2,3
c. 1,3,4
d. 1,2,3,4 correct answers C
Prophylatic therapy is intended to:
a. relieve pain
b. heal/stall ulceration, fungation or fracture
c. improve the quality of life
d. sterilize areas of microscopic disease correct answers D
The Negative side of the basic x-ray tube is known as the:
,a. anode
b. cathode
c. filament
d. vacuum correct answers B
If a 50 keV electron collides w. an inner shell e- w. a binding energy of 25keV, the resulting
photoelectron will have an energy of :
a. 25 keV
b. 75 keV
c. 100 keV
d. 150 keV correct answers a (50keV-25keV = 25keV)
A photon of 25 A has a kinetic energy of ____keV.
a. 0.489
b. 1.82
c. 0.496
d. 0.688 correct answers C (E=12.4/lamda; E=12.4/25A = .0496 keV)
If using a tungsten target, the fraction of 4 MeV electrons converted to photons is what?
a. 10.36%
b. 12.84%
c. 11.36%
d. 9.87% correct answers A (tungsten atomic number(Z) is 74, max energy of electron = E, use
formula F=3.5x10^-4 (Z) (E) to find answer)
,The probability of a photoelectric interaction _____ with increasing energies and _____ with the
atomic number of the medium. correct answers decrease, increase
After alpha decay, the daughter nuclide will have an atomic mass number___ amu lower than the
parent.
a. 1
b. 2
c. 4
d. 6 correct answers C
An atom is neutral if the # of its e- is equal to its:
a. protons
b. nucleons
c. atomic weight
d. none of the above correct answers A
Solve for lambda in hours^-1
A=5mCi
A0=18mCi
t=50 hours
a. 0.0335 hrs^-1
b. 0.00256 hrs^-1
c. 0.0256 hrs^-1
d. 0.588 hrs^-1 correct answers C
, 2 or more chemicals w/ the same chemical formula, but different nuclear states are known as:
a. isomers
b. isotopes
c. isobars
d. isotones correct answers B
Which of the following is not true about the electromagnetic spectum?
They all have the SAME _____.
a. velocity
b. energy
c. mass
d. charge correct answers B
Radon has a T1/2 = 3.83 days . what is the average life?
a. 3.83 d
b. 4.4 d
c. 5.5 d
d. 6.6 d correct answers C (Ta=T1/2/0.693)
Carbon-14 and nitrogen-14 are
a. isotones
b. isotopes
c. isobars
d. isomers correct answers C (same mass)
