mcq2-15

1. What is the lower critical temperature (LCT) for steel?

• 500°C
• 723°C
• 800°C
• 1000°C

2. Which stage of heat treatment involves uniform heating?

• Soaking
• Quenching
• Preheating
• Cooling

3. Which quenching medium is commonly used for plain carbon steels?

• Oil
• Air
• Water
• Brine solution

4. What type of steel is known as eutectoid steel?

• High carbon steel
• Low carbon steel
• Alloy steel
• Stainless steel

5. What does the upper critical temperature (UCT) signify?

• Start of heating
• Start of soaking
• Full austenitization
• Completion of quenching