Explore topic-wise MCQs in Advanced Powder Metallurgy Processing Techniques.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Advanced Powder Metallurgy Processing Techniques knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following depicts the stages of molten metal disintegration?

A. Wave formation → ligament formation → powder
B. Wave formation → ligament formation → fine droplets → breakdown to smaller particles → powder
C. Wave formation → ligament formation → fine droplets → breakdown to smaller particles → collision & coalescence of particles
D. Wave formation → ligament formation → fine droplets → collision & coalescence of particles
Answer» D. Wave formation → ligament formation → fine droplets → collision & coalescence of particles
Discussion
2.

The rate of atomization and orifice area have a _______ relation.

A. Logarithmic
B. Inverse
C. Exponential
D. Linear
Answer» E.
Discussion
3.

The particle shape of water atomized copper becomes more irregular upon addition of _____

A. Silicon
B. Lithium
C. Tantalum
D. Potassium
Answer» C. Tantalum
Discussion
4.

What is the effect of increased temperature on the particle size?

A. Independent
B. Decreases
C. Increases
D. Increases first and then decreases
Answer» D. Increases first and then decreases
Discussion
5.

The rate of atomization ______ with increase in temperature.

A. Increases
B. Decreases
C. Zero
D. Constant
Answer» C. Zero
Discussion
6.

The effect of pressure of atomizing medium is given ________

A. r=a+b\(\sqrt[3]{p}\)
B. r=a-b\(\sqrt{p}\)
C. r=a-b\(\sqrt[3]{h}\)
D. r=a+b\(\sqrt{p}\)
Answer» E.
Discussion
7.

Which of the following set of conditions leads to maximum fineness?

A. Increase in air pressure and increase in flow of metal
B. Decrease in air pressure and increase in flow of metal
C. Increase in air pressure and decrease in flow of metal
D. Decrease in air pressure and decrease in flow of metal
Answer» B. Decrease in air pressure and increase in flow of metal
Discussion
8.

The fraction of coarse powder will increase as the quantity of metal available for atomization increases.

A. True
B. False
Answer» B. False
Discussion
9.

The effect of pressure of metal head is given ________

A. r=a+b\(\sqrt[3]{h}\)
B. r=a+b\(\sqrt{h}\)
C. r=a-b\(\sqrt[3]{h}\)
D. r=a-b\(\sqrt{h}\)
Answer» C. r=a-b\(\sqrt[3]{h}\)
Discussion
10.

Which of the following is a process parameter for atomization process?

A. Orifice volume
B. Pressure of atomizing medium
C. Temperature of atomizing medium
D. Atomizing medium properties
Answer» C. Temperature of atomizing medium
Discussion
11.

The shearing forces involved in atomization depends on the ________

A. Reynolds number
B. Temperature
C. Pressure
D. Biot’s number
Answer» B. Temperature
Discussion
12.

The velocity of the liquid metal stream is given by the equation _________

A. v=A\(\sqrt{2g(P_g-P_i)\rho}\)
B. v=A\(\sqrt{2g(P_i-P_g)\rho}\)
C. v=A\(\sqrt[3]{2g(P_i-P_g)\rho}\)
D. v=A\(\sqrt[3]{2g(P_g-P_i)\rho}\)
Answer» C. v=A\(\sqrt[3]{2g(P_i-P_g)\rho}\)
Discussion
13.

Under which set of conditions is the spherical particle shape obtained?

A. Lower surface tension
B. Lower surface tension and low cooling rates
C. Higher surface tension and low cooling rates
D. Lower surface tension and high cooling rates
Answer» D. Lower surface tension and high cooling rates
Discussion
14.

Under which set of conditions is the irregular particle shape obtained?

A. Lower surface tension
B. Lower surface tension and low cooling rates
C. Higher surface tension and low cooling rates
D. Lower surface tension and high cooling rates
Answer» E.
Discussion
15.

Which force fragments the liquid into ligaments in atomization process?

A. Tensile force
B. Shear force
C. Compressive force
D. Torque
Answer» C. Compressive force
Discussion