CPT Manufacturing Processes & Production 2

Question 1

Which machining operation removes material by rotating a cutting tool against a stationary workpiece to create flat or contoured surfaces?

Accepted Answer

Milling

Answer

Milling uses a rotating multi-point cutting tool to remove material from a stationary or fed workpiece, producing flat, slotted, or contoured surfaces.

Question 2

In injection molding, what is the purpose of the 'holding pressure' phase?

Accepted Answer

To compensate for material shrinkage as the part solidifies

Answer

Holding pressure is applied after the mold cavity is filled to compensate for shrinkage as the molten plastic cools and solidifies, ensuring dimensional accuracy.

Question 3

What does 'takt time' represent in a lean manufacturing environment?

Accepted Answer

The average time between customer demand units

Answer

Takt time is calculated as available production time divided by customer demand, representing the rate at which products must be completed to meet demand.

Question 4

Which welding process uses a non-consumable tungsten electrode and is commonly used for welding thin aluminum or stainless steel?

Accepted Answer

TIG (GTAW)

Answer

TIG (Gas Tungsten Arc Welding) uses a non-consumable tungsten electrode and an inert shielding gas, producing high-quality welds on thin or precision materials.

Question 5

A production run yields 480 good parts out of 500 attempted. What is the first-pass yield (FPY)?

Accepted Answer

96%

Answer

First-pass yield = (good parts / total attempted) × 100 = (480 / 500) × 100 = 96%.

(CPT) Certified Production Technician Practice Test

(CPT) Certified Production Technician Practice Test

CPT Manufacturing Processes & Production 2