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- Question 1 of 16
Match the phenomena listed in Group I with the possible mechanisms in Group II
Group I Group II
P. Fatigue 1. Grain boundary sliding
Q. Creep 2. Slip band extrusion and intrusion
R. Strain hardening 3. Cottrell atmosphere
S. Yield point phenomenon 4. Dislocation interactionCorrectIncorrect
- Question 2 of 16
Fracture stress for a brittle material having a crack length of 1 μm is 200 MPa. Fracture stress for the same material having a crack length of 4 μm isCorrectIncorrect
- Question 3 of 16
Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion : During rolling, front tension and (or) back tension are (is) employed to decrease rolling load.
Reason : Roll pressure decreases due to lowering of flow stress as a result of front tension/back tension.CorrectIncorrect
- Question 4 of 16
Match the defects listed in Group I with the processes listed in Group II
Group I Group II
P. Cold shut 1. Rolling
Q. Earing 2. Forging
R. Alligatoring 3. Deep drawing
S. Shrinkage porosity 4. Fusion weldingCorrectIncorrect
- Question 5 of 16
Which one of the following factors is NOT desirable for effective phosphorus removal in BOF steelmaking process?CorrectIncorrect
- Question 6 of 16
Which one of the following microstructures of a Ni-base superalloy imparts the highest creep resistance?CorrectIncorrect
- Question 7 of 16
Which one of the following is NOT an intensive property?CorrectIncorrect
- Question 8 of 16
Which one of the following metal forming processes is the earing defect associated with?CorrectIncorrect
- Question 9 of 16
The Pilling-Bedworth ratio is defined asCorrectIncorrect
- Question 10 of 16
A tensile specimen was deformed at a constant crosshead speed of 6 mm/min. The strain rate at the start of the testing was .005 per sec. The initial gauge length of the specimen (in mm) was _______CorrectIncorrect
- Question 11 of 16
If all the elements of one row of a 3 × 3 matrix are multiplied by 3, the determinant of the matrix changes by a factor ofCorrectIncorrect
- Question 12 of 16
As mercury is cooled from room temperature to 3 K, its electrical behaviour changes from that ofCorrectIncorrect
- Question 13 of 16
Which one of the following refers to the ability of a material to absorb energy when deformed elastically?CorrectIncorrect
- Question 14 of 16
In the trapezoidal rule for numerical integration of a function, the nature of approximation used for the function in each interval isCorrectIncorrect
- Question 15 of 16
Which one of the following NDT techniques CANNOT be used to detect an internal crack in a steel shaft?CorrectIncorrect
- Question 16 of 16
Two identical engineering components are made from alloys X and Y. The Kic of alloy X is greater than that of alloy Y. If these components are subjected to the same stress during operation under Mode I loading, which one of the following statements is TRUE?CorrectIncorrect