- Chemical Engineering Basics - Section 1
- Chemical Engineering Basics - Section 2
- Chemical Engineering Basics - Section 3
- Chemical Engineering Basics - Section 4
- Chemical Engineering Basics - Section 5
- Chemical Engineering Basics - Section 6
- Chemical Engineering Basics - Section 7
- Chemical Engineering Basics - Section 8
- Chemical Engineering Basics - Section 9
- Chemical Engineering Basics - Section 10
- Chemical Engineering Basics - Section 11
- Chemical Engineering Basics - Section 12
- Chemical Engineering Basics - Section 13
- Chemical Engineering Basics - Section 14
- Chemical Engineering Basics - Section 15
- Chemical Engineering Basics - Section 16
- Chemical Engineering Basics - Section 17
- Chemical Engineering Basics - Section 18
- Chemical Engineering Basics - Section 19
- Chemical Engineering Basics - Section 20
- Chemical Engineering Basics - Section 21
- Chemical Engineering Basics - Section 22
- Chemical Engineering Basics - Section 23
- Chemical Engineering Basics - Section 24
- Chemical Engineering Basics - Section 25
- Chemical Engineering Basics - Section 26
- Chemical Engineering Basics - Section 27
- Chemical Engineering Basics - Section 28


Chemical Engineering Basics - Engineering
Q1: Drills are usually made ofA cermets
B high speed steel
C alloy steel
D tungsten carbide
ANS:B - high speed steel Drills are usually made of high-speed steel (HSS). High-speed steel is a type of tool steel that is specifically designed for use in cutting tools, such as drills, taps, and milling cutters. It is renowned for its ability to maintain its hardness and cutting ability at elevated temperatures, allowing it to withstand the high speeds and temperatures generated during metal cutting operations. High-speed steel typically contains alloying elements such as tungsten, molybdenum, chromium, and vanadium, which enhance its hardness, toughness, and heat resistance. These properties make high-speed steel an ideal material for manufacturing drills, as it can efficiently cut through various metals and withstand the rigors of drilling operations. While other materials such as tungsten carbide and cermets are also used in some specialized drilling applications, high-speed steel remains the most common and versatile material for drill manufacturing due to its excellent balance of hardness, toughness, and cost-effectiveness. |


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