Casting, Forming and Welding II Practice Test 5

1. In pulse-echo method, which defect does the following amplitude-time graph represent?

2. The electron beam technology is not much efficient as compared to the laser technology used for manufacturing.

3. A low frequency induction furnace works on what frequency current?

4. With an increase in the density of the material who does it affect the power loss in eddy current?

5. What is the maximum frequency accepted for the motor, used in current production of high frequency induction furnace?

6. In permanent mould casting method, metallic cores are mainly used instead of sand cores.

7. A high frequency induction furnace can melt metal up to what mass?

8. In which of the following materials, ultrasonic testing cannot be used?

9. Which of the following defect is not detected by dye penetrant test?

10. Penetrants of which colour are not used?