ASNT Questions and Answers
A+ Graded (2025)
The .Symbol .R .means:
a. .rem
b. .rad
c. .roentgen
d. .radiation .- .CORRECT .ANSWER-c. .roentgen
The .acronym .rad .means:
a. .radiation .absorbed .dose
b. .roentgen .absorbed .dose
c. .roentgen .acquired .dose
d. .radiation .at .death .- .CORRECT .ANSWER-a. .radiation .absorbed .dose
The .roentgen .(R) .exposure .is .measured .in:
a. .tissue
b. .water
c. .a .lab
d. .air .- .CORRECT .ANSWER-d. .air
The .symbol .mR .means:
a. .milliroentgen
b. .microroentgen
c. .megaroentgen
d. .millirem .- .CORRECT .ANSWER-a. .milliroentgen
One .roentgen .or .1 .R .is .equal .to:
a. .100 .milliroentgen
b. .1000 .milliroentgen
c. .0.001 .milliroentgen
d. .1 .milliroentgen .- .CORRECT .ANSWER-b. .1000 .milliroentgen
The .acronym .rem .stands .for:
,a. .radiation .equivalent .man
b. .radiation .effect .man
c. .roentgen .effect .man
d. .roentgen .equivalent .man .- .CORRECT .ANSWER-d. .roentgen .equivalent .man
The .initialism .QF .stands .for:
a. .quantity .factor
b. .quality .frequency
c. .quality .factor
d. .quality .effective .factor .- .CORRECT .ANSWER-c. .quality .factor
The .quality .factor .for .X-rays .and .gamma .rays .is:
a. .1
b. .2
c. .10
d. .20 .- .CORRECT .ANSWER-a. .1
The .quality .factor .for .alpha .(ray) .particles .is:
a. .1
b. .2
c. .10
d. .20 .- .CORRECT .ANSWER-d. .20
Activity .of .radioactive .material .is .measured .in:
a. .curies
b. .roentgens
c. .sieverts
d. .grays .- .CORRECT .ANSWER-a. .curies
Becquerels .and .curies .are .units .of .measurement .of:
a. .physical .size .of .the .source
b. .gray .per .hour
c. .decay .rate
d. .roentgen .per .hour .- .CORRECT .ANSWER-c. .decay .rate
Atoms .that .have .excess .energy .and .are .unstable .are .known .as:
a. .radioactive
b. .radioactivity
c. .balanced
d. .weighted .- .CORRECT .ANSWER-a. .radioactive
,Elementary .particles .units .with .a .negative .electrical .charge .and .a .mass
.approximately .equal .to .1/1840 .that .of .a .proton .are:
a. .electrons
b. .protons
c. .neutrons
d. .valence .shells .- .CORRECT .ANSWER-a. .electrons
Positively .charged .elementary .particles .with .a .mass .approximately .equal .to .1840
.times .that .of .an .electron, .or .1 .AMU, .are .known .as:
a. .electrons
b. .protons
c. .neutrons
d. .valence .shells .- .CORRECT .ANSWER-b. .protons
Uncharged .elementary .particles .with .a .mass .nearly .equal .to .that .of .a .proton .are
.called:
a. .electrons
b. .protons
c. .neutrons
d. .valence .shells .- .CORRECT .ANSWER-c. .neutrons
The .area .known .as .the .center .of .an .atom .is .called .the:
a. .electron
b. .nucleus
c. .proton
d. .neutron .- .CORRECT .ANSWER-b. .nucleus
Any .byproduct .material .that .is .encased .in .a .capsule .designed .to .prevent .leakage
.or .escape .of .the .byproduct .material .is .a:
a. .drum
b. .pig
c. .sealed .source
d. .container .- .CORRECT .ANSWER-c. .sealed .source
A .tube .through .which .the .radioactive .source .travels .when .inside .a .radiographic
.exposure .device .is .a/an:
a. .port .tube
b. .guide .tube
c. .S .tube
d. .exit .tube .- .CORRECT .ANSWER-c. .S .tube
Survey .meters .must .be .calibrated .at .intervals .not .to .exceed:
, a. .three .months .and/or .after .instrument .servicing .except .for .battery .changes
b. .six .months .and/or .after .instrument .servicing .except .for .battery .changes
c. .annually .and .after .instrument .servicing .except .for .battery .changes
d. .daily .and .after .instrument .servicing .except .for .battery .changes .- .CORRECT
.ANSWER-b. .six .months .and/or .after .instrument .servicing .except .for .battery
.changes
A .survey .meter .must .be .capable .of .measuring .a .range .of:
a. .0 .to .1000 .mR/h .(0 .to .10 .mSv/h)
b. .2 .to .1000 .R/h .(0.02 .to .10 .Sv/h)
c. .0 .to .1000 .R/h .(0 .to .10 .Sv/h)
d. .2 .to .1000 .mR/h .(0.02 .to .10 .mSv/h) .- .CORRECT .ANSWER-d. .2 .to .1000 .mR/h
.(0.02 .to .10 .mSv/h)
Becquerels .and .curies .are .units .of .measurement .of:
a. .physical .size .of .the .source
b. .activity
c. .gray .per .hour
d. .roentgen .per .hour .- .CORRECT .ANSWER-b. .activity
An .analog .survey .meter .must .be .calibrated .on .each .scale .at .two .points
.approximately:
a. .33% .and .66% .of .the .scale's .potential
b. .25% .and .75% .of .the .scale's .potential
c. .through .the .full .range .of .the .scale's .potential
d. .at .the .midpoint .of .the .scale's .potential .- .CORRECT .ANSWER-a. .33% .and .66%
.of .the .scale's .potential
The .process .that .results .in .the .removal .of .orbital .electrons .from .atoms .resulting
.in .the .formation .of .ion .pairs .is .called:
a. .excitation
b. .radioactivity
c. .decay
d. .ionization .- .CORRECT .ANSWER-d. .ionization
The .fact .that .gases .bombarded .by .ionizing .radiation .become .conductors .of
.electrical .current .make .them . useful .in:
a. .X-ray .transformers
b. .cathode .tubes
c. .detection .equipment
d. .gasses .cannot .conduct .electrical .charges .- .CORRECT .ANSWER-c. .detection
.equipment
A .dosimeter .must .be .capable .of .reading .a .range .of:
A+ Graded (2025)
The .Symbol .R .means:
a. .rem
b. .rad
c. .roentgen
d. .radiation .- .CORRECT .ANSWER-c. .roentgen
The .acronym .rad .means:
a. .radiation .absorbed .dose
b. .roentgen .absorbed .dose
c. .roentgen .acquired .dose
d. .radiation .at .death .- .CORRECT .ANSWER-a. .radiation .absorbed .dose
The .roentgen .(R) .exposure .is .measured .in:
a. .tissue
b. .water
c. .a .lab
d. .air .- .CORRECT .ANSWER-d. .air
The .symbol .mR .means:
a. .milliroentgen
b. .microroentgen
c. .megaroentgen
d. .millirem .- .CORRECT .ANSWER-a. .milliroentgen
One .roentgen .or .1 .R .is .equal .to:
a. .100 .milliroentgen
b. .1000 .milliroentgen
c. .0.001 .milliroentgen
d. .1 .milliroentgen .- .CORRECT .ANSWER-b. .1000 .milliroentgen
The .acronym .rem .stands .for:
,a. .radiation .equivalent .man
b. .radiation .effect .man
c. .roentgen .effect .man
d. .roentgen .equivalent .man .- .CORRECT .ANSWER-d. .roentgen .equivalent .man
The .initialism .QF .stands .for:
a. .quantity .factor
b. .quality .frequency
c. .quality .factor
d. .quality .effective .factor .- .CORRECT .ANSWER-c. .quality .factor
The .quality .factor .for .X-rays .and .gamma .rays .is:
a. .1
b. .2
c. .10
d. .20 .- .CORRECT .ANSWER-a. .1
The .quality .factor .for .alpha .(ray) .particles .is:
a. .1
b. .2
c. .10
d. .20 .- .CORRECT .ANSWER-d. .20
Activity .of .radioactive .material .is .measured .in:
a. .curies
b. .roentgens
c. .sieverts
d. .grays .- .CORRECT .ANSWER-a. .curies
Becquerels .and .curies .are .units .of .measurement .of:
a. .physical .size .of .the .source
b. .gray .per .hour
c. .decay .rate
d. .roentgen .per .hour .- .CORRECT .ANSWER-c. .decay .rate
Atoms .that .have .excess .energy .and .are .unstable .are .known .as:
a. .radioactive
b. .radioactivity
c. .balanced
d. .weighted .- .CORRECT .ANSWER-a. .radioactive
,Elementary .particles .units .with .a .negative .electrical .charge .and .a .mass
.approximately .equal .to .1/1840 .that .of .a .proton .are:
a. .electrons
b. .protons
c. .neutrons
d. .valence .shells .- .CORRECT .ANSWER-a. .electrons
Positively .charged .elementary .particles .with .a .mass .approximately .equal .to .1840
.times .that .of .an .electron, .or .1 .AMU, .are .known .as:
a. .electrons
b. .protons
c. .neutrons
d. .valence .shells .- .CORRECT .ANSWER-b. .protons
Uncharged .elementary .particles .with .a .mass .nearly .equal .to .that .of .a .proton .are
.called:
a. .electrons
b. .protons
c. .neutrons
d. .valence .shells .- .CORRECT .ANSWER-c. .neutrons
The .area .known .as .the .center .of .an .atom .is .called .the:
a. .electron
b. .nucleus
c. .proton
d. .neutron .- .CORRECT .ANSWER-b. .nucleus
Any .byproduct .material .that .is .encased .in .a .capsule .designed .to .prevent .leakage
.or .escape .of .the .byproduct .material .is .a:
a. .drum
b. .pig
c. .sealed .source
d. .container .- .CORRECT .ANSWER-c. .sealed .source
A .tube .through .which .the .radioactive .source .travels .when .inside .a .radiographic
.exposure .device .is .a/an:
a. .port .tube
b. .guide .tube
c. .S .tube
d. .exit .tube .- .CORRECT .ANSWER-c. .S .tube
Survey .meters .must .be .calibrated .at .intervals .not .to .exceed:
, a. .three .months .and/or .after .instrument .servicing .except .for .battery .changes
b. .six .months .and/or .after .instrument .servicing .except .for .battery .changes
c. .annually .and .after .instrument .servicing .except .for .battery .changes
d. .daily .and .after .instrument .servicing .except .for .battery .changes .- .CORRECT
.ANSWER-b. .six .months .and/or .after .instrument .servicing .except .for .battery
.changes
A .survey .meter .must .be .capable .of .measuring .a .range .of:
a. .0 .to .1000 .mR/h .(0 .to .10 .mSv/h)
b. .2 .to .1000 .R/h .(0.02 .to .10 .Sv/h)
c. .0 .to .1000 .R/h .(0 .to .10 .Sv/h)
d. .2 .to .1000 .mR/h .(0.02 .to .10 .mSv/h) .- .CORRECT .ANSWER-d. .2 .to .1000 .mR/h
.(0.02 .to .10 .mSv/h)
Becquerels .and .curies .are .units .of .measurement .of:
a. .physical .size .of .the .source
b. .activity
c. .gray .per .hour
d. .roentgen .per .hour .- .CORRECT .ANSWER-b. .activity
An .analog .survey .meter .must .be .calibrated .on .each .scale .at .two .points
.approximately:
a. .33% .and .66% .of .the .scale's .potential
b. .25% .and .75% .of .the .scale's .potential
c. .through .the .full .range .of .the .scale's .potential
d. .at .the .midpoint .of .the .scale's .potential .- .CORRECT .ANSWER-a. .33% .and .66%
.of .the .scale's .potential
The .process .that .results .in .the .removal .of .orbital .electrons .from .atoms .resulting
.in .the .formation .of .ion .pairs .is .called:
a. .excitation
b. .radioactivity
c. .decay
d. .ionization .- .CORRECT .ANSWER-d. .ionization
The .fact .that .gases .bombarded .by .ionizing .radiation .become .conductors .of
.electrical .current .make .them . useful .in:
a. .X-ray .transformers
b. .cathode .tubes
c. .detection .equipment
d. .gasses .cannot .conduct .electrical .charges .- .CORRECT .ANSWER-c. .detection
.equipment
A .dosimeter .must .be .capable .of .reading .a .range .of:
