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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

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Charpy and Izod Impact Testing of Materials

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1. Fracture-appearance transition temperature, FATT corresponds to?

a: 40 % cleavage fracture Explanation

Explanation

b: 50 % cleavage fracture Explanation

Explanation

c: 0 % cleavage fracture Explanation

Explanation

d: 100 % cleavage fracture Explanation

Explanation

2. For impact test, T5 in the schematic below correspond to (T indicates temperature):

a: T5 – FTP Explanation

Explanation

b: T5 – DTT Explanation

Explanation

c: T5 – FATT Explanation

Explanation

d: T5 – NDT Explanation

Explanation

3. Fracture surfaces of the same alloy are shown below from impact tests conducted at three different temperatures (T1, T2 and T3). Which one of them is true?

a: T1>T3>T2 Explanation

Explanation

b: T3>T2>T1 Explanation

Explanation

c: T3>T1>T2 Explanation

Explanation

d: T2>T3>T1 Explanation

Explanation

4. In a hypothetical curve given below for impact testing, B might correspond to:

a: Copper Explanation

Explanation

b: Nickel Explanation

Explanation

c: Mild steel Explanation

Explanation

d: Aluminum Explanation

Explanation

5. Which of the following is correct?

a: In Izod test, the pendulum hits on the opposite surface to that containing notch Explanation

Explanation

b: The impact energy is related to difference between initial and final height Explanation

Explanation

c: In Charpy test, the pendulum hits on the same surface that contains notch Explanation

Explanation

d: In India, we predominantly use Izod impact test Explanation

Explanation

6. The strain rates in impact test are:

a: Slightly higher than tensile tests Explanation

Explanation

b: lower than tensile tests Explanation

Explanation

c: Almost similar to tensile tests Explanation

Explanation

d: Much higher than tensile tests Explanation

Explanation

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