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تحميل الدليل التدريبي

أسئلة شائعة


King Saud University

College of Pharmacy

Dept. of Pharmaceutics


351 PHT

Final exam


Dr. Abdullah M. Al-Mohizea


Student’s Name :_______________________________

Student’s Number :_____________________________

Answer all questions in this exam. The total for this exam is 100 points distributed as shown for each question. Make sure you have 6 pages including the cover page.


Q1. Circle the most appropriate answer in the following questions (4 points each):


1.      Which of the following radiations are listed in increasing order of radiation weighting factor,WR? (i.e., increase from left to right)

a.       γ, α ,β

b.      γ, β, α

c.       β, γ, α

d.      α, β, γ

e.       α, γ, β


2.      Nuclides which belong to different elements and have the same number of neutrons are called:

a.       Isotopes

b.      Isobars

c.       Isotones

d.      Isoprotons

e.       None of the above



3.      The following types of radiation are released as an electromagnetic energy:

a.       Beta radiation

b.      Gamma radiation

c.       X-rays

d.      Both A and B

e.       Both B and C





4.      The process by which a proton is converted to a neutron is called:

a.       A positive beta decay

b.      A negative beta decay

c.       Electron capture

d.      Alpha decay

e.       Both A and C



5.       Which of the following statements about radiation measurements is not true:

a.       Becquerel is the radiation unit used to measure the activity of radioactive nuclei.

b.      Roentgen relates to the amount of ionization caused by radiation in air and it is used to measure radiation absorption.

c.       Gray is used to measure exposure to radiation.

d.      Both B and C

e.       None of the above


6.      In Alpha decay,

a.       Z and A are unchanged

b.      Z decreases by 4 and A decreases by 2

c.       Z decreases by 2 and A decreases by 4

d.      Z decreases by 4 and A decreases by 4

e.       Depends on the energy of the isotope.


7.      “If an individual is exposed to 5 Sv of radiation by an accident, death is likely to occur within weeks from the time of exposure due to bone marrow failure”. This is an example of:

a.       Deterministic effects of radiation.

b.      Stochastic effects of radiation.

c.       None-stochastic effects of radiation

d.      Non-deterministic effects of radiation

e.       A and C


8.      The best way to reduce your exposure to radiation is to do the following:

a.       Reduce exposure time.

b.      Increase distance

c.       Use a shield

d.      A and C

e.       All of the above


9.      The following statement(s) regarding the radiation shielding efficiency of materials is/are correct:

a.       As the density of the absorber increase, the shielding efficiency increase subsequently.

b.      Attenuation coefficient which inversely proportional to the radiation energy

c.       As the thickness of the absorber decrease, the shielding efficiency increase.

d.      A and B

e.       All of the above



10.  The following are some examples of cytotoxic agents used to treat cancer, except:

a.       Agents which are structurally similar to essential metabolites which are necessary for normal cell functions.

b.      Agents that can form a bond between the two strands of DNA

c.       Agents that metabolize some intracellular proteins which are involved in the process of cell division.

d.      Both A and C

e.       None of the above







Q2. The half-life of 239Pu is 24000 years. How long will it take for stored plutonium (Pu) waste to decay to 1.0% of its present value? (30  points)























Q3. From the scientific film “Safe handling of cytotoxic drugs” which was shown in class: (30 points)

a.      What were the four different sections covered by the film?








b.      What were the components of the cytotoxic spill kit mentioned in the film?





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