Question: please assingment is due 11:30 pm tonight answer all 4 question 1. Which one of the following typically has the lowest hot hardness at elevated

please assingment is due 11:30 pm tonight answer all

4 question

1. Which one of the following typically has the lowest hot hardness at elevated temperatures in various cutting-tool materials? (6 pts) a) Carbon steels b) High-speed steels c) Carbides d) Diamond 2. are among the most important, versatile, and cost-effective tool and die materials for a wide range of applications. (6 pts) a) Carbon and medium alloy steels b) Carbides c) Cast-cobalt alloys d) Diamond 3. Which one of the following is NOT a common coating material over high-speed steel and carbide tools. (6 pts) a) Titanium nitride (TIN) b) Titanium carbide (TIC) c) Titanium carbonirtite (TICN) d) Zirconia (ZrO2) 4. Which one of the following is NOT a commonly used cutting fluid in machining operations? (6 pts) a) Oils b) Emulsions c) Synthetics d) Sulfides

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