Test: Alloy Steel & Cutting Tool Materials - 1 - Mechanical Engineering MCQ

The limit to the maximum hardness of a work material which can be machined with HSS tools even at low speeds is set by which one of the following tool failure mechanisms? 

The compositions of some of the alloy steels are as under: 
1. 18 W 4 Cr 1 V
2. 12 Mo 1 W 4 Cr 1 V
3. 6 Mo 6 W 4 Cr 1 V
4. 18 W 8 Cr 1 V
The compositions of commonly used high speed steels would include

Match List-I (Alloying element in steel) with List-II (Property conferred on steel by the element) and select the correct answer using the codes given below the lists:
List-I                                                  List-II
A. Nickel                                    1. Corrosion resistance
B. Chromium                              2. Magnetic permeability
C. Tungsten                                3. Heat resistance
D. Silicon                                    4. Hardenability
Codes: A B C D                        A B C D
        (a) 4 1 3 2                    (b) 4 1 2 3
        (c) 1 4 3 2                    (d) 1 4 2 3

Assertion (A): Austenitic stainless steel contains 18% chromium and 8% nickel. Since itretains its austenitic structure at room temperature, it is called austenitic stainless steel. Reason (R): Chromium present in the steel improves its corrosion resistance by forming athin film of chromium oxide on the surface.  

Match List-I (Alloys) with List-II (Applications) and select the correct answer using the codes given below the lists: 
List-I                                              List-II
A. Chromel                          1. Journal bearing
B. Babbit alloy                     2. Milling cutter
C. Nimonic alloy                  3. Thermocouple wire
D. High speed steel             4. Gas turbine blades
Code: A B C D                A B C D
     (a) 3 1 4 2             (b) 3 4 1 2
     (c) 2 4 1 3             (d) 2 1 4 3

Assertion (A): The characteristic feature of High speed Steel is its red hardness.Reason (R): Chromium and cobalt in High Speed promote martensite formationwhen the tool is cold worked.  

Which of the following processes can be used for production thin, hard, heatresistant coating at TiN, on HSS? 
1. Physical vapour deposition.
2. Sintering under reducing atmosphere.
3. Chemical vapour deposition with post treatment
4. Plasma spraying.
Select the correct answer using the codes given below:
Codes:

Match List-I with List-II and select the correct answer using the codes given below the lists: 
List-I                                                   List-II
(Material)                                       (Structure)
A. Charcoal                                  1. F.C.C
B. Graphite                                   2. H.C.P
C. Chromium                                3. Amorphous
D. Copper                                     4. B.C.C
Code: A B C D                    A B C D
      (a) 3 2 1 4                 (b) 3 2 4 1
      (c) 2 3 4 1                 (d) 2 3 1 4

Monel metal is an alloy of 

Which one of the following is the hardest cutting tool material next only to diamond? 

Which of the following given the correct order of increasing hot hardness of cutting tool material? 

Coefficient of Expansion is practically nil in a particular alloy. What is this alloy?

Addition of vanadium to steel results in improvement of  

Cubic boron nitride 

Which one of the following is not a synthetic abrasive material?  

Which of the following pairs are correctly matched? 
1. Silicon steels ………Transformer stampings
2. Duralumin ……Cooking utensils.
3. Gun metal................. Bearings
Select the correct answer using the codes given below.Codes:

Disruptive strength is the maximum strength of a metal, when