HEMISPHERES 3.0 LEVEL VII DISCHARGE &
PREVENTION EXAM QUESTIONS WITH CORRECT
ANSWERS |2026 LATEST UPLOAD WITH COMPLETE
SOLUTION
1. Which two non-destructive testing techniques are mentioned for detecting
flaws in materials?
Magnetic particle testing and dye penetrant testing
Radiographic testing and ultrasonic testing
Visual inspection and hardness testing
Eddy current testing and tensile testing
2. The Rockwell C test - used, for example, on hardened steels - employs a
Steel ball indenter
Diamond (brale) indenter
Quartz indenter
Silicon Carbide indenter
3. If a weld exhibits crack propagation in its hard zone, which of the following
strategies could be employed to mitigate this issue?
Increase the carbon content in the weld material
Apply a post-weld heat treatment to reduce hardness
Use radiographic testing to identify the cracks
Avoid using any non-destructive testing methods
,4. A steel component is subjected to high-temperature plastic deformation
during manufacturing. How would you expect its mechanical properties to
change after the process, and what subsequent treatment might be
necessary to optimize its performance?
The component will only harden, requiring no further treatment.
, The component will harden and may require annealing to relieve
stresses.
The component will soften and become unusable.
The component will remain unchanged and require no treatment.
5. What is the primary source of gamma rays as mentioned in the text?
X-ray machines
Radioisotopes
Ultrasonic waves
Heat treatment processes
6. Explain the significance of gamma rays being omni-directional in the
context of non-destructive testing.
They can only be detected in one direction.
They allow for comprehensive coverage of the inspected area.
They are less effective than other radiation types.
They require special equipment to focus.
7. What is a key benefit of using non-destructive testing methods on
materials?
It allows for the complete destruction of the material.
It can identify flaws without compromising the material's integrity.
It is the only method used for testing metal hardness.
It requires the material to be heated to high temperatures.
8. If a hardened ball indenter creates an indentation area of 100 mm² under a
pressure of 500 Kg, what is the Brinell hardness number?
0.2
, 2
20
200
9. What is the primary purpose of normalising in the context of steel
treatment?
To increase the carbon content
To refine grain structure and improve mechanical properties
To enhance corrosion resistance
To reduce the weight of the steel
10. A manufacturing company is experiencing issues with hydrogen
embrittlement in their welded components. They decide to implement
controlled techniques in their post-heat treatment process. Which of the
following actions should they prioritize to address this issue effectively?
Increase the welding speed to reduce exposure time.
Utilize thermocouples to monitor and control the temperature
during post-heat treatment.
Switch to a higher carbon steel to improve strength.
Conduct radiographic testing to identify existing flaws.
11. If a metallurgist is annealing copper at 600°C and decides to cool it using
water quenching, what can they expect regarding the properties of the
copper after the process?
The copper will become harder and more brittle.
The copper will retain its ductility and softness.
The copper will exhibit increased tensile strength.
The copper will have a reduced electrical conductivity.
PREVENTION EXAM QUESTIONS WITH CORRECT
ANSWERS |2026 LATEST UPLOAD WITH COMPLETE
SOLUTION
1. Which two non-destructive testing techniques are mentioned for detecting
flaws in materials?
Magnetic particle testing and dye penetrant testing
Radiographic testing and ultrasonic testing
Visual inspection and hardness testing
Eddy current testing and tensile testing
2. The Rockwell C test - used, for example, on hardened steels - employs a
Steel ball indenter
Diamond (brale) indenter
Quartz indenter
Silicon Carbide indenter
3. If a weld exhibits crack propagation in its hard zone, which of the following
strategies could be employed to mitigate this issue?
Increase the carbon content in the weld material
Apply a post-weld heat treatment to reduce hardness
Use radiographic testing to identify the cracks
Avoid using any non-destructive testing methods
,4. A steel component is subjected to high-temperature plastic deformation
during manufacturing. How would you expect its mechanical properties to
change after the process, and what subsequent treatment might be
necessary to optimize its performance?
The component will only harden, requiring no further treatment.
, The component will harden and may require annealing to relieve
stresses.
The component will soften and become unusable.
The component will remain unchanged and require no treatment.
5. What is the primary source of gamma rays as mentioned in the text?
X-ray machines
Radioisotopes
Ultrasonic waves
Heat treatment processes
6. Explain the significance of gamma rays being omni-directional in the
context of non-destructive testing.
They can only be detected in one direction.
They allow for comprehensive coverage of the inspected area.
They are less effective than other radiation types.
They require special equipment to focus.
7. What is a key benefit of using non-destructive testing methods on
materials?
It allows for the complete destruction of the material.
It can identify flaws without compromising the material's integrity.
It is the only method used for testing metal hardness.
It requires the material to be heated to high temperatures.
8. If a hardened ball indenter creates an indentation area of 100 mm² under a
pressure of 500 Kg, what is the Brinell hardness number?
0.2
, 2
20
200
9. What is the primary purpose of normalising in the context of steel
treatment?
To increase the carbon content
To refine grain structure and improve mechanical properties
To enhance corrosion resistance
To reduce the weight of the steel
10. A manufacturing company is experiencing issues with hydrogen
embrittlement in their welded components. They decide to implement
controlled techniques in their post-heat treatment process. Which of the
following actions should they prioritize to address this issue effectively?
Increase the welding speed to reduce exposure time.
Utilize thermocouples to monitor and control the temperature
during post-heat treatment.
Switch to a higher carbon steel to improve strength.
Conduct radiographic testing to identify existing flaws.
11. If a metallurgist is annealing copper at 600°C and decides to cool it using
water quenching, what can they expect regarding the properties of the
copper after the process?
The copper will become harder and more brittle.
The copper will retain its ductility and softness.
The copper will exhibit increased tensile strength.
The copper will have a reduced electrical conductivity.
