Mechanical Metallurgy Mock Test 9

10%

Question 1 of 10

1. The counterblow hammer is competent solution to reduce the problem of ground shock and noise while using the forging hammer.

True

False

Question 1 of 10

Question 2 of 10

2. Which of the following statement is correct about the coefficient of friction between the roll and workpiece?

The coefficient of friction is constant throughout the arc of contact

The friction force act opposite to roll direction in the entrance and along the roll direction in exit

The friction force act in the roll direction in entrance and opposite to the roll direction in exit

The coefficient of friction always acts in a single direction throughout the arc of contact

Question 2 of 10

Question 3 of 10

3. Which of the following forging hammer has the lowest velocity of impact?

Gravity drop hammer

Hydraulic press

Power drop hammer

HERF

Question 3 of 10

Question 4 of 10

4. Hot-working is generally carried out in multiple steps whereas the cold working is carried out in single step.

False

True

Question 4 of 10

Question 5 of 10

5. The arc of contact between the roll and the workpiece is circular in geometry, and its radius is smaller than the roll radius.

False

True

Question 5 of 10

Question 6 of 10

6. The dimension tolerance allowances are much more significant for hot working process compared to cold working process.

False

True

Question 6 of 10

Question 7 of 10

7. The cylindrical sample of the same diameter but different height is compressed. The stress required in sample with __________ height will require ________ stress than the sample with __________ height.

less, more, more

less, less, more

more, more, less

more, less, less

Question 7 of 10

Question 8 of 10

8. In the rolling of thick plates and sheets, the friction angle and angle of the bite are always equal to each other.

False

True

Question 8 of 10

Question 9 of 10

9. The forging load required will ___________ with increase in the width of flash.

no relationship

decrease

increase

remain the same

Question 9 of 10

Question 10 of 10

10. The rotor for the turbine is made by which of the following metal working process?

Rolling

Extrusion

Forging

Deep drawing

Question 10 of 10