CWB LEVEL 2 UPDATED COMPREHENSIVE EXAM
QUESTIONS AND ANSWERS SURE A+
✔✔On a radiograph, excessive joint penetration appears as a _________ line.
(A) light
(B) dark - ✔✔(A) light
✔✔What are the minimum number of RT shots required for small-diameter tubing?
(A) 1
(B) 2
(C) 4 - ✔✔(B) 2
Note: Each shot must be done at 90° to each other.
✔✔On a radiograph, defects closer to the film side of the weld will appear __________.
(A) Fuzzier
(B) Sharper - ✔✔(B) Sharper
✔✔Which organization in Canada controls the use of gamma ray devices?
(A) CNSC
,(B) CGSB
(C) Provincial regulatory body - ✔✔(A) CNSC
Note: Stands for Canadian Nuclear Safety Commission
✔✔Which organization in Canada controls the use of x-ray devices?
(A) CNSC
(B) CGSB
(C) Provincial regulatory body - ✔✔(C) Provincial regulatory body
✔✔How many shots would be required to RT a splice weld in a rectangular hollow
structural section when there is no access to the inside? - ✔✔4
✔✔In an X-ray setup, increasing the voltage _________ the penetrating power.
[Increases / Decreases] - ✔✔Increases
✔✔Which device is now commonly used by RT personnel for measuring their radiation
dose?
(A) radiation survey meter
(B) thermo-luminescent dosimeter (TLD)
(C) personal audible alarm
(D) collimator - ✔✔(B) thermo-luminescent dosimeter (TLD)
✔✔Stainless steels are defined as those containing at least _____% chromium. -
✔✔10%
✔✔In an iron-chromium alloy, chromium content higher than _____% means austenite
cannot form.
(A) 8%
(B) 11%
(C) 14%
(D) 28% - ✔✔14%
Note: An iron-chromium alloy with more than 15% chromium is ferritic.
✔✔What kind of crystalline structure does chromium have?
(A) FCC
(B) BCC - ✔✔(B) BCC
, ✔✔What kind of crystalline structure does nickel have?
(A) FCC
(B) BCC - ✔✔(A) FCC
✔✔True or False:
Increasing the nickel content allows austenite to remain stable at lower temperatures. -
✔✔True
✔✔An iron-nickel alloy is austenitic at room temperature when nickel contents are
above _____%.
(A) 8%
(B) 11%
(C) 14%
(D) 28% - ✔✔(D) 28%
Note: The percentage of nickel can be much lower when chromium is added to the mix!
✔✔Complete the sentence:
"With 18% chromium, a stainless steel can be austenitic with only _____% nickel
present".
(A) 8%
(B) 11%
(C) 14%
(D) 28% - ✔✔(A) 8%
✔✔What is the main alloying element in the AISI 200 series?
(A) chromium
(B) chromium and nickel
(C) manganese - ✔✔(C) manganese
✔✔What is the main alloying element in the AISI 300 series?
(A) chromium
(B) chromium and nickel
(C) manganese - ✔✔(B) chromium and nickel
Note: Steels in this series are austenitic!
QUESTIONS AND ANSWERS SURE A+
✔✔On a radiograph, excessive joint penetration appears as a _________ line.
(A) light
(B) dark - ✔✔(A) light
✔✔What are the minimum number of RT shots required for small-diameter tubing?
(A) 1
(B) 2
(C) 4 - ✔✔(B) 2
Note: Each shot must be done at 90° to each other.
✔✔On a radiograph, defects closer to the film side of the weld will appear __________.
(A) Fuzzier
(B) Sharper - ✔✔(B) Sharper
✔✔Which organization in Canada controls the use of gamma ray devices?
(A) CNSC
,(B) CGSB
(C) Provincial regulatory body - ✔✔(A) CNSC
Note: Stands for Canadian Nuclear Safety Commission
✔✔Which organization in Canada controls the use of x-ray devices?
(A) CNSC
(B) CGSB
(C) Provincial regulatory body - ✔✔(C) Provincial regulatory body
✔✔How many shots would be required to RT a splice weld in a rectangular hollow
structural section when there is no access to the inside? - ✔✔4
✔✔In an X-ray setup, increasing the voltage _________ the penetrating power.
[Increases / Decreases] - ✔✔Increases
✔✔Which device is now commonly used by RT personnel for measuring their radiation
dose?
(A) radiation survey meter
(B) thermo-luminescent dosimeter (TLD)
(C) personal audible alarm
(D) collimator - ✔✔(B) thermo-luminescent dosimeter (TLD)
✔✔Stainless steels are defined as those containing at least _____% chromium. -
✔✔10%
✔✔In an iron-chromium alloy, chromium content higher than _____% means austenite
cannot form.
(A) 8%
(B) 11%
(C) 14%
(D) 28% - ✔✔14%
Note: An iron-chromium alloy with more than 15% chromium is ferritic.
✔✔What kind of crystalline structure does chromium have?
(A) FCC
(B) BCC - ✔✔(B) BCC
, ✔✔What kind of crystalline structure does nickel have?
(A) FCC
(B) BCC - ✔✔(A) FCC
✔✔True or False:
Increasing the nickel content allows austenite to remain stable at lower temperatures. -
✔✔True
✔✔An iron-nickel alloy is austenitic at room temperature when nickel contents are
above _____%.
(A) 8%
(B) 11%
(C) 14%
(D) 28% - ✔✔(D) 28%
Note: The percentage of nickel can be much lower when chromium is added to the mix!
✔✔Complete the sentence:
"With 18% chromium, a stainless steel can be austenitic with only _____% nickel
present".
(A) 8%
(B) 11%
(C) 14%
(D) 28% - ✔✔(A) 8%
✔✔What is the main alloying element in the AISI 200 series?
(A) chromium
(B) chromium and nickel
(C) manganese - ✔✔(C) manganese
✔✔What is the main alloying element in the AISI 300 series?
(A) chromium
(B) chromium and nickel
(C) manganese - ✔✔(B) chromium and nickel
Note: Steels in this series are austenitic!
