CWB 2 All Modules Exam 2025 Version Best Studying
Material with All Questions from Actual Exam and
Correct Answer
An ultrasonic beam changes angle (refracts) when it travels from a plastic probe into a steel
specimen because:
A) The wave velocity is different in steel than in plastic
B) The frequency is different in steel than in plastic
C) Only transverse waves can travel in steel
D) The angle does not change
E) The amplitude is reduced by attenuation ----------- Correct Answer ----------- A) The wave
velocity is different in steel than in plastic
What range of density should a radiograph have according to CSA W59?
A) 7.3 to 8.2
B) It should be calculated from the source size, thickness and object to source distance
C) 2T to 4T (T is the plate thickness)
D) 1.5 to 3.5
E) 300 to 3000 cd/m2 ----------- Correct Answer ----------- D) 1.5 to 3.5
Electromagnetic radiation with wavelengths longer than visible light are:
A) Infra red, ultrasonic and x-rays
B) Gamma rays, microwave and radiowaves
C) Radio, microwaves, and infrared rays
D) X-rays, gamma rays, and ultra violet ----------- Correct Answer ----------- C) Radio,
microwaves, and infrared rays
If you are examining a groove weld in a plate from one surface with an angle probe, you would
examine the upper portion of the weld by:
A) Placing the probe on the weld reinforcement
B) Moving the probe as close as possible to the weld
C) Using a normal probe close to the edge of the weld
D) Moving the probe away from the weld so the beam bounces off the lower surface to strike the
upper portion of the weld
E) None of the above. The upper portion cannot be examined ----------- Correct Answer -----------
D) Moving the probe away from the weld so the beam bounces off the lower surface to strike the
upper portion of the weld
The first item that should be checked or calibrated on an angle probe is:
,A) Wavelength
B) Angle
C) Linearity
D) Exit (index point)
Not applicable. Calibration is not necessary ----------- Correct Answer ----------- D) Exit (index
point)
Sounds detectable by human ear are in the range of:
A) 1 to 10 nHz
B) 1,000 to 10,000 cycles per second
C) 20 to 20,000 cycles per second
D) 20 kHz to 2,000 kHz ----------- Correct Answer ----------- C) 20 to 20,000 cycles per second
Ultrasonic testing frequencies are in the range of:
A) 50 to 500MHz
B) 2.25 to 10 MHz
C) 500 kHz to 5,000 MHz
D 500 kHz to 15 MHz ----------- Correct Answer ----------- C) 500 kHz to 5,000 MHz
Characteristics of a wave propagating through material are:
A) Wavelength, velocity and frequency
B) Density, colour, and weight
C) Melleability, hardness, and toughness
D) Frequency, Velocity, and surface finish ----------- Correct Answer ----------- A) Wavelength,
velocity and frequency
Non-uniform stress in a rod is given by:
A) The load multiplied by the cross section area of the rod
B) The cross-sectional area of the rod divided by the load
C) The load divided by the cross-sectional area of the rod
D) Cannot be simply calculated ----------- Correct Answer ----------- D) Cannot be simply
calculated
Strain in a body is the:
A) Extension divided by the original length
B) Extension multiplied by the original length
C) Original length multiplied by the extension
D) Original length divided by the extension ----------- Correct Answer ----------- A) Extension
divided by the original length
The elastic limit during tensile testing will be reached:
, A) Before yield
B) After Yeild
C) After UTS
D) At the point where the specimen fractures ----------- Correct Answer ----------- B) After Yeild
The UTS (ultimate tensile strength) on a stress-strain curve shows where the:
A) Maximum stress was recorded
B) Sample fractured
C) Sample changed from plastic or elastic behavior
D) Maximum yield point occurred ----------- Correct Answer ----------- A) Maximum stress was
recorded
The yield stength (YS) is given by:
A) 80% of maximum load divided by the cross-sectional area
B) The load at the breaking point divided by the cross-sectional area
C) The yield point load divided by the cross-sectional area
D) The maximum load divided by the cross-sectional area ----------- Correct Answer ----------- C)
The yield point load divided by the cross-sectional area
The primary reason for performing a guided bend test is to determine the:
A) Ability of a welder to produce sound welds
B) Suitability of a welding procedure
C) Suitability of a welding consumable
D) All of the above ----------- Correct Answer ----------- D) All of the above
Which of the following hardness testers will be used because it has a small indentation size that
can easily locate regions in a weld?
A) Brinell
B) Knoop
C) Vickers
D) Rockshaw ----------- Correct Answer ----------- C) Vickers
Brittle materials in a toughness test will:
A) Absorb significant energy
B) Absorb minimal energy
C) Deform with considerable plasticity
D) Exhibit a flat and dull surface ----------- Correct Answer ----------- B) Absorb minimal energy
A proof test on a structure to measure the final quality of manufacture is a test that:
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