Machining Processes and Tools

1. The tool used to cut workpieces by utilizing the relative motion between the cutting tool and the workpiece is... a. Drill b. Milling Machine c. Lathe d. Grinder

• c. Router

• d. Sander

• a. Saw

• b. Milling Machine

Answer explanation

The correct answer is b. Milling Machine, as it cuts workpieces by moving the cutting tool relative to the workpiece, unlike the other options which serve different purposes in machining.

2. What is meant by the milling process? a. Cutting process using a cylindrical cutting tool b. Cutting process using a grinding wheel c. Cutting process using a chisel-shaped tool d. Cutting process using a saw-shaped tool

• Cutting process using a laser beam

• Cutting process using a rotary tool

• Cutting process using a flat cutting tool

• a. Cutting process using a cylindrical cutting tool

Answer explanation

The milling process refers to a cutting process using a cylindrical cutting tool, which rotates to remove material from a workpiece. This makes option a the correct choice.

3. The machine used to produce holes in workpieces is... a. Lathe b. Grinder c. Drill d. Milling Machine

• c. Drill

• d. CNC Router

• b. Sander

• a. Band Saw

Answer explanation

The correct answer is c. Drill, as it is specifically designed to create holes in various materials, unlike the other options which serve different purposes in machining.

4. In machining, 'cutting speed' refers to... a. The speed of the rotating machine b. The speed of the cutting tool c. The speed of the workpiece d. The speed of the tool movement

• The speed of the machine's feed rate

• The speed of the operator's hand movement

• The speed of the coolant flow

• c. The speed of the workpiece

Answer explanation

In machining, 'cutting speed' specifically refers to the speed of the workpiece as it moves past the cutting tool, making option c the correct choice.

5. What is the purpose of using coolant in machining processes? a. To increase the temperature b. To reduce friction c. To improve surface finish d. To prevent tool wear

• a. To increase the pressure

• b. To reduce friction

• d. To enhance tool hardness

• c. To decrease cutting speed

Answer explanation

The purpose of using coolant in machining processes is primarily to reduce friction. This helps in lowering the temperature, improving surface finish, and preventing tool wear, making option b the correct choice.

6. Which machine is primarily used for shaping flat surfaces? a. Lathe b. Milling Machine c. Drill d. Grinder

• b. Milling Machine

• d. Surface Grinder

• c. Belt Sander

• a. Band Saw

Answer explanation

The milling machine is specifically designed for shaping flat surfaces, making it the correct choice. Other options like lathe and drill serve different purposes, while grinders focus on finishing rather than shaping.

7. The process of removing material from a workpiece using a rotating tool is known as... a. Turning b. Milling c. Grinding d. Drilling

• b. Milling

• Sanding

• Polishing

• Welding

Answer explanation

The process of removing material from a workpiece using a rotating tool is called milling. It involves a rotating cutter that moves across the material, making it the correct choice among the options provided.

8. What type of cutting tool is typically used in a lathe? a. Circular saw b. End mill c. Single-point cutting tool d. Band saw

• Chisel

• Router bit

• Drill bit

• c. Single-point cutting tool

Answer explanation

A lathe typically uses a single-point cutting tool, which allows for precise shaping and cutting of materials. Other options like circular saws and band saws are not suitable for lathe operations.

9. In machining, what does the term 'feed rate' refer to? a. The speed of the machine b. The rate at which the tool moves into the workpiece c. The speed of the workpiece rotation d. The amount of coolant used

• b. The rate at which the tool moves into the workpiece

• c. The temperature of the workpiece

• a. The amount of material removed

• d. The speed of the tool

Answer explanation

The term 'feed rate' in machining specifically refers to the rate at which the tool moves into the workpiece, making option b the correct choice. It is crucial for determining the efficiency and quality of the machining process.

10. Which of the following is a common material used for cutting tools? a. Plastic b. Wood c. High-speed steel d. Rubber

• Glass

• Ceramic

• c. High-speed steel

• Aluminum

Answer explanation

High-speed steel is a common material for cutting tools due to its ability to withstand high temperatures and maintain sharpness. Unlike plastic, wood, or rubber, it is specifically designed for durability and precision in cutting applications.