Basic Heat Treatment(SB-2)

Question 1

(True or False) Most nonferrous metals can be normalized and case hardened but not
annealed.

Question 1

What process consists of tempering, normalizing, hardening, and annealing?

Question 2

Which of the following conditions is required for the successful heat treatment of metals?

Question 3

(True or False) A fuel-fired furnace produces an atmosphere consisting of a gas/air
combustion product?”

Question 4

Which of these gas mixtures are constituents of a fuel-fired furnace atmosphere?

Question 5

What allows you to provide an oxidizing, reducing, or neutral atmosphere in a fuel fired
furnace?

Question 6

What type of furnace(s) allows the atmosphere to consist of air only?

Question 7

What is the primary cause of distortion and cracking of the heat-treated part?

Question 8

How do you determine the soaking period when parts are uneven in cross section?

Question 9

What type of medium is normally used to quench nonferrous metals?

Question 10

What effect is produced when steel is cooled very slowly in a medium that does NOT
conduct heat easily?

Question 11

Copper becomes hard and brittle when mechanically worked, but it can be made soft again
by annealing. Within what temperature range must you heat it to anneal it?

Question 12

(True or False) Normalizing is a form of heat treatment applicable to nonferrous metals
only.

Question 13

Which of these metals are difficult to harden by heat treatment?

Question 14

What factor almost completely determines the maximum obtainable hardness in plain
carbon steel?

Question 15

What case-hardening method produces the hardest surface of any of the hardening
processes?

Question 16

If the steel parts are placed in a container packed with charcoal and heated in a furnace,
what case-hardening process is being used?

Question 17

On what areas of a part being flame hardened should a slightly oxidizing flame be used?

Question 18

Which of these factors determines the rate at which you move the welding torch when
flame hardening a steel part?

Question 19

(True or False) Flame hardening can produce a hard case that resists wear while the core
retains the metal’s original properties.

Question 20

What term is used to describe the process of heating steel to a specific temperature , holding this temperature for a certain length of time, and then
cooling the steel in still air to room temperature?

Question 21

(True or False) Steel can be tempered provided some hardness remains after it has been
normalized.

Question 22

In which of the following metals are the softness, ductility, and resistance to impact NOT
increased?

Question 23

What are the most important properties to be obtained in tempering permanent steel
magnets?

Question 24

Why should you agitate the part or the quenching medium when cooling a part?

Question 25

For which of the following reasons is the flush method of quenching better than other
quenching methods for parts having cavities or recesses?

Question 26

What temperature should water not exceed when used as a quenching medium?

Question 27

Which of these quenching media has the highest cooling rate compared to water?

Question 28

What is the correct solution for a brine quench medium?

Question 29

(True or False) Caustic soda requires special handling because of its harmful effects on
skin and clothing.

Question 30

(True or False) Air quenching should only be used for nonferrous metals