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Radiochemistry and Nuclear Chemistry self-test # 7

Comprises Chapter 7

This is a self grading test of your knowledge. It consists of 20 randomly chosen questions with single or multiple answers. The questions with single answers have round buttons and the questions with perhaps more than one correct answer have square buttons. Answer the questions by clicking on the corresponding button in the list of alternative answers. On questions with a single answer (round buttons to click on), it is only possible to mark one of the alternative answers as correct.
Grading of the completed test is automatic when you click on the button marked "GRADE MY ANSWERS" at the end of the test.
Correct answers can be read by clicking on the button having the same number as the question. You find these buttons at the end of the test. You can also refresh your memory first by jumping directly to the answer buttons and click on them to get answers and read relevant parts of the book before doing this test.
On the questions with one or more possible answers (squares to click on) only the first click on each button is recorded as an answer. Hence you must click on the reset button below the question before you can change the original answer(s). Failure to do this will probably make the answers on this question regarded as wrong in the grading process.
Please observe that your teacher may require a deeper understanding of the treated subject than reflected by this test. In case you have any valuable comments or questions regarding this self-test, explain them in an e-mail to: jol@nc.chalmers.se 


Question # 1 (One answer) The G-value is defined as

    A) the constant of gravity stored at BIPM in Paris
    B) the gravitation between two celestial bodies
    C) the strength of the spin-orbit coupling in metastable nuclides
    D) the chemical reaction yield of a radiation dose
    E) the energy variation of reaction velocity

Question # 2 (One or more answers) When a concentrated solution of 239Pu nitrate is stored it undergoes self radiolysis. Which of the following substances can be added in order to prevent precipitation of plutonium peroxide?

    A) Hydrogen peroxide
    B) Strontium titanate
    C) Barium sulfate
    D) Sodium nitrite
    E) Sodium perchlorate

In case of an error in the answers above, please click on this button before making any corrections 

Question # 3 (One or more answers) The amount of energy which is transferred from an energetic ion to electrons during its passage through a material depends on some of the following. Which?

    A) The velocity of light in the material
    B) The mass of the ion
    C) The binding energy of the electrons
    D) The ionic charge
    E) The velocity of the ion

In case of an error in the answers above, please click on this button before making any corrections 

Question # 4 (One answer) When an irradiated crystal is heated it may release the internally stored energy as heat. This is called

    A) The Franck-Gordon effect
    B) The Jan-Teller effect
    C) Hans Bethe's phenomenon
    D) The Wigner effect
    E) Termoluminescence

Question # 5 (One or more answers) The Fricke dosimeter is an aqueous solution containing one or more of the following chemicals. Which ones?

    A) Sodium chloride
    B) Brom cresol green
    C) Ferro ammonium sulfate
    D) Hydrogen peroxide
    E) Sulfuric acid

In case of an error in the answers above, please click on this button before making any corrections 

Question # 6 (One answer) The unit used for an absorbed dose is in the SI-system

    A) Sv
    B) Bq/s
    C) kJ/m2 
    D) Gy
    E) D

Question # 7 (One answer) In order to study very short lived chemical compounds in radiation chemistry one can use

    A) paper chromatography
    B) pulse radiolysis
    C) dark radiation showers
    D) inbred white mice
    E) photo selenography

Question # 8 (One answer) Kerma is normally given in one of the following units

    A) Gy
    B) Sv
    C) rem
    D) rad
    E) J/kg

Question # 9 (One or more answers) When ionizing radiation hits a metal it gives rise to

    A) fluorescence lightning
    B) Jan-Teller effects
    C) black spots on the surface
    D) dislocation energy
    E) micro explosions

In case of an error in the answers above, please click on this button before making any corrections 

Question # 10 (One or more answers) One or more of the following substances are end products from radiolysis of water. Which?

    A) Ammonia
    B) Hydrogen gas
    C) Nitrogen gas
    D) Oxygen gas
    E) Nitric acid

In case of an error in the answers above, please click on this button before making any corrections 

Question # 11 (One answer) Specific ionization is

    A) the energy loss per unit length (J/m)
    B) the number of ion pairs per unit length (ion pairs/m)
    C) another name for the average electron binding energy (eV)
    D) the concentration of excited atoms (mol/liter)
    E) the track length in mica (mm)

Question # 12 (One answer) Glass is sometimes irradiated in order to

    A) determine its tensile strength
    B) decrease its dissolution rate
    C) color it
    D) increase the degree of cross linking
    E) increase its volume

Question # 13 (One or more answers) The gamma dose rate at 1 m distance from an unshielded g-source in vacuum depends on

    A) the Q-value
    B) the     g-energy
    C) the half thickness
    D) the index of refraction
    E) the     g-yield

In case of an error in the answers above, please click on this button before making any corrections 

Question # 14 (One or more answers) When some types of irradiated crystals are heated they emit light. This is called thermoluminiscense and it is among other things also used in

    A) dosimetry
    B) emergency lights
    C) archeological age determinations
    D) spectrophotometry
    E) smoke detectors

In case of an error in the answers above, please click on this button before making any corrections 

Question # 15 (One answer) Which year was it discovered that ionizing radiation could cause skin cancers?

    A) 1895
    B) 1902
    C) 1907
    D) 1939
    E) 1946

Question # 16 (One answer) What is the typical range of radiation dose used in industrial production of shrinking films and tubes?

    A) 40-100 Gy
    B) 400-1000 Gy
    C) 4-10 kGy
    D) 40-100 kGy
    E) 400-1000 kGy

Question # 17 (One or more answers) The term indirect ionizing radiation refers to one or more of the following types of radiation. Which?

    A) Beta rays
    B) Alpha particles
    C) Neutrons
    D) Visible light
    E) Gamma rays

In case of an error in the answers above, please click on this button before making any corrections 

Question # 18 (One or more answers) When metals are exposed to radiation they may

    A) increase in volume
    B) become depleted
    C) become brittle
    D) lose their weight
    E) decrease in density

In case of an error in the answers above, please click on this button before making any corrections 

Question # 19 (One answer) Which of the following types of radiation has the highest LET-value?

    A) Alfa radiation
    B) Beta radiation
    C) Gamma radiation
    D) Heavy ions like 16O8+ 
    E) X-rays

Question # 20 (One answer) When the dose unit, Gray, is converted to the fundamental units in the SI-system it becomes

    A) (m/s)2 
    B) mc2 
    C) Ws/mole
    D) s/steradian
    E) s2/m

Correct answers to each question can be obtained by clicking on the corresponding button below

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(Updated 2001-08-20)