1) When drilling stainless steel, use a drill having a Report

Point angle of 120^o, slow cutting speed.

Point angle of 90^o, fast cutting speed.

Point angle of 90^o, slow cutting speed.

2) Twist drill point angle for drilling stainless steel, titanium alloys and hard alloys is Report

90^o

120^o

135^o

3) How a material is galvanised? Report

Sprayed with nickel solution.

Packed in a drum containing zinc dust and heated.

Dipped in a bath of molten zinc.

4) When drilling titanium material, High ? Speed Steel (HSS) drill with a point angle of Report

90^o to 100^o is recommended

105^o to 120^o is recommended

135^o to 160^o is recommended

5) What is the angle 118^o on the drill is called? Report

Point Angle

Ground Angle

Phase Angle

6) A steel should be tempered at what temperature? Report

At the annealing temperature.

Above the annealing temperature.

Below the annealing temperature.

7) What is the purpose of Annealing a steel? Report

To soften the steel for forming or to improve machinability

To hardend the steel after forming

To prevent corrosion

8) Tempering steel gives Report

greater brittleness.

greater hardness.

relief of internal stress after hardening.

9) The alloying (adding) of chromium to steel will increase what properties of steel? Report

Toughness and Malleablity

Ductility and Malleability

Strength and Hardness.

10) Chromium added to plain carbon steel Report

increases it's resistance to corrosion.

turns it into a non-ferrous alloy.

makes the metal softer.

11) The purpose of ?case hardening?of metals is to Report

produce a hard case over a tough core.

reduce the carbon in the steel.

introduce carbon into the steel.

12) The process of hardening the surface of a metal object while allowing the metal deeper underneath to remain soft is called Report

Alloying

Coating

Case hardening

13) At normal temperatures, HC(High Carbon) steel is harder because, Report

it has more austenite.

it has less austenite.

of the % of carbon in the granules.

14) A heat treating process that defuses nitrogen into the surface of a metal to create a hard surface is called Report

Alloying

Nitriding

Anodising

15) Nitriding is a process of Report

tempering.

anodising.

case hardening.

16) Medium carbon steels have a carbon content of Report

0.3 - 0.5 %.

0.5 - 0.8 %.

0.8 - 1.05 %.

17) A ferrous metal contains Report

Iron

Aluminium.

Magnesium.

18) With respect to ferrous metals which of the following is true? Report

Iron is not any element of ferrous metals.

Iron is a main element and most ferrous metals are magnetic.

Iron is a main element and ferrous metals are not magnetic.

19) Sometimes the annealing process on steel is required as it Report

provides a corrosion resistant layer that prevents oxidation.

allows the material a greater stress per unit area.

relieves internal stress suffered after engineering processes.

20) The process which will soften the aluminum alloy, to enable it to be worked without cracking is called Report

Annealing

Case hardening

Nitriding

EASA Questions Module 6: Materials Set 1: Materials - Ferrous

Set 1: Materials - Ferrous

Set 2: Materials - Ferrous

Set 3: Materials - Non-Ferrous

Set 4: Composite & Non-Metal

Set 5: Wooden Structures

Set 6: Fabric Covering

Set 7: Corrosion

Set 8: Screw Threads

Set 9: Bolts, studs & screws

Set 10: Locking devices

Set 11: Rivets

Set 12: Pipes and Unions

Set 13: Bearings

Set 14: Transmissions

Set 15: Control Cables

Set 16: Electrical Cables