Questions & Answers
- Radiographic Testing (RT) Level - 1 - 2 - 3

Level 3	Question	[Ref]
1	In a betatron, acceleration of electrons into circular path is achieved by	[AGFA]
	a) a rotating magnetic field
	b) travelling wave guides
	c) the Villard doubling circuit
	d) venturi tubes
2	Electrostatic or Van de Graff generators have their advantage in that they	[AGFA]
	a) operate in the 1 to 2 MeV region
	b) have relatively small focal spots
	c) have reasonably high output
	d) all of the above
3	For type-2 exposure devices using a flexible metal drive cable to position the isotope, the isotope capsule is attached to a	[ASNT]
	a) zircalloy tube
	b) pigtail
	c) depleted uranium shield
	d) quick disconnect coupling
4	Should an isotope camera be found to be leaking radioactive material subsequent to a wipe test	[ASNT]
	a) the depleted uranium is to be replaced
	b) all exposures since the last wipe test are to be recalled
	c) the source is to be destroyed
	d) none of the above
5	The time it takes to reestablish the electric field intensity required in a G-M counter after the counter has been paralysed by ion avalanche is called	[ASNT]
	a) resolving time
	b) dead time
	c) quench time
	d) dwell time
6	In LiF dosimetry, energy stored in the material as a result of irradiation is released by	[ASNT]
	a) applying a voltage
	b) heating
	c) illuminating
	d) resonating
7	In the Van de Graff generator, the heated cathode can be replaced by a gaseous discharge for	[ASNT]
	a) electron supply
	b) positive ion acceleration
	c) coolant purposes
	d) prevention of arcing
8	The mathematical equation describing the law of electric forces is called	[Burns]
	a) Planck's Law
	b) Einstein's Law
	c) Newton's Law
	d) Coulomb's Law
9	Inertia is a property of	[Burns]
	a) matter
	b) x-rays
	c) neutrinos
	d) light
10	A single unit of electromagnetic energy is a (an)	[Burns]
	a) magneton
	b) electron
	c) phonon
	d) photon
11	What is the kinetic energy of an electron ejected from the K-orbit of an atom by photoelectric absorption if the K-orbit binding energy is 500 eV and the photon energy is 1 keV?	[Burns]
	a) 0 eV
	b) 500 eV
	c) 1000 eV
	d) 2500 eV
12	The equation E=mcý was first derived by	[Burns]
	a) J.J. Thompson
	b) Mme Curie
	c) Planck
	d) Einstein
13	The difference between the mass of the nucleus and the sum of the masses of the particles making up that nucleus is the	[Friedlander]
	a) mass coefficient
	b) delta force
	c) binding energy
	d) thermal power factor
14	In á decay, the atomic number (Z) changes by	[Friedlander]
	a) -1
	b) 0
	c) 1
	d) 4
15	In positron decay, in addition to the positron a(n) ________ is also emitted.	[Friedlander]
	a) neutron
	b) neutrino
	c) electron
	d) alpha particle
16	A nucleus having more energy than it has in its ground state is considered to be in a(n) _________ state.	[Friedlander]
	a) elevated
	b) charged
	c) excited
	d) isomeric
17	If a nucleus is in an excited state, it can return to its ground state by emission of a(n)	[Friedlander]
	a) electron
	b) gamma photon
	c) neutrino
	d) alpha particle
18	If an excited state nucleus returns to ground state via internal conversion	[Friedlander]
	a) an x-ray is emitted
	b) an electron is emitted
	c) an electron is captured
	d) the atomic number(Z) increases
19	In most radiography of steel under 50mm thick the largest portion of time spent in producing the finished product (radiograph) is in	[IIW Handbook]
	a) setting-up
	b) exposure
	c) development
	d) all of the above equally
20	Inspite of the fact that maximum detectability of nonfusion defects might occur if the x-ray beam is not parallel to the fusion wall, butt welds are usually radiographed such that	[IIW Handbook]
	a) the beam is parallel to the film
	b) the film is at right angles to the weld
	c) the beam is at right angles to the weld
	d) the beam is at right angles to the film and 45ø to the weld
21	Prior to evaluating a component from a radiograph of the part, the radiograph is evaluated for quality based on	[IIW Handbook]
	a) latitude
	b) density
	c) sensitivity
	d) all of the above
22	When the number of orbital electrons equals the number of nuclear protons in an atom is	[Jaundrell]
	a) a positive ion
	b) a negative ion
	c) in a normal neutral state
	d) considered to be meta-stable
23	1 milliampere second is equivalent to ________ coulombs	[Jaundrell]
	a) 0.001
	b) 0.01
	c) 1
	d) 1000
24	Two 2 ohm resistors connected in parallel result in a total resistance of ________ ohms.	[Jaundrell]
	a) 0.25
	b) 0.5
	c) 1
	d) 4
25	If 2 æF capacitors are connected in series the resultant capacitance is	[Jaundrell]
	a) 0.25æF
	b) 0.5æF
	c) 1æF
	d) 4æF
26	Resistance in most conducting wires tends to decrease with increasing	[Jaundrell]
	a) density
	b) vacuum (negative pressure)
	c) mass
	d) temperature
27	Grenz rays, typically used in x-ray diffraction work, have energies in the range of	[Training Manual 3]
	a) 1-2MeV
	b) 500-1000 keV
	c) 50-100 keV
	d) 5-20 keV
28	A radiation induced alteration in the DNA of a cell that does not kill the cell but alters characteristics of the off-spring of that cell is	[Training Manual 3]
	a) mutation
	b) sterilization
	c) clonogenesis
	d) metamorphosis
29	Ionizing radiation refers to	[Training Manual 3]
	a) electromagnetic radiation
	b) corpuscular radiation
	c) radiation from the useful beam only
	d) any EM or corpuscular radiation that is capable of producing ions
30	X-radiation that is emitted from an x-ray tube that does not make up the useful beam is	[Training Manual 3]
	a) wasted
	b) scatter radiation
	c) secondary radiation
	d) leakage radiation

References (NDT TestMaker software)

1. [Training Manual 2] Minister of Supply and Services Canada Training Manual 2, Radiation hazard Control in Industrial Radiography, Health and Welfare Canada, 1982.
2. [Training Manual 3] Minister of Supply and Services Canada Radiation Hazard Control in Industrial Radiography RPB - TM - 3, Health and Welfare Canada, 1973
3. [Asimov] Asimov, Issac, Understanding Physics: The Electron, Proton and Neutron, New American Library, Inc. , 1966
4. [Burnham] Burnham, J.U. Radiation Protection Point Lepreau Generating Station, N.B. Power,1986
5. Chesney, D.N., & Chesney, M.O., Radiation Photography, William Clowes & Sons, 1965 Chesney
6. [Jaundrell] Jaundrell-Thompson,F. & Ashworth, W.K., X-ray Physics and Equipment, Blackwell Scientific Publications, 1965
7. [Agfa] Agfa-Gevaert N.V., Industrial Radiography, Agfa-Gevaert N. V., 1986
8. [Burns] Burns, D. M. & MacDonald, S.G.G., Physics for Biology and Pre-Medical Students, Addison-Wesley Publsihing Company, 1970
9. [Hall] Hall, E. J., Radiobiology for the Radiobiologist, Second Edition, Harper and Row, Publishers, 1978
10. [Friedlander] Friedlander.G., Kennedy.J.W., Miller,J.M., Nuclear and Radiochemistry, John Wiley & Sons, Inc., 1964
11. [ASNT]American Society for Nondestructive Testing Nondestructive Testing Handbook, Vol. 2, Second Edition, American Society for Nondestructive Testing, 1982
12. Halmshaw, R., Mathematics and Formulae in NDT British Institute of Nondestructive Testing, 1983 Math in NDT
13. [IIW Handbook] International Institute of Welding, Handbook on Radiographic Apparatus and Techniques, International Institute of Welding, 1961
14. [Freifelder] Freifelder, D., Molecular Biology, Second Edition, Jones and Bartlett Publishers, Inc. 1987