Test: Alloy Steel & Cutting Tool Materials - 2 - Mechanical Engineering MCQ

The alloy steel designated as 40 Cr18 Ni 2 by Bureau of Indian Standards contains    

Percentage of various alloying elements present in different steel materials are given below: 
1. 18% W; 4% Cr; 1% V; 5% Co; 0.7% C
2. 8% Mo; 4% Cr; 2% V; 6% W; 0.7% C
3. 27% Cr; 3% Ni; 5% Mo; 0.25% C
4. 18% Cr; 8% Ni; 0.15% C
Which of these relate to that of high speed steel?

The main alloying elements in high speed Steel in order of increasing proportionare 

Match List I (Alloying Element) with List II (Effect on Steel) and select the correct answer using the code given below the Lists: 
List I                                                    List II
A. Vanadium                            1. Increases endurance strength
B. Molybdenum                        2. Improves creep properties
C. Silicon                                  3. Increases hardness
D. Chromium                            4. Increases resistance to high temperature oxidation
Codes: A B C D                      A B C D
        (a) 2 1 3 4                  (b) 1 3 2 4
        (c) 2 1 4 3                   (d) 1 2 3 4

Consider the following statements in respect of austenitic stainless steels:1. Austenitic stainless steels are hardened and strengthened by cold working.  
2. Austenitic stainless steels cannot be quenched and tempered.
Which of the statements given above is/are correct?

Assertion (A): For high-speed turning of magnesium alloys, the coolant or cuttingfluid preferred is water-miscible mineral fatty oil.  
Reason (R): As a rule, water-based oils are recommended for high-speed operations in which high temperatures are generated due to high frictional heat.Water being a good coolant, the heat dissipation is efficient.

18/8 stainless steel contains  

Match List I with List IT and select the correct answer using the codes given below the lists:  
List - I (Cutting tool Material)                 List - I I(Major characteristic constituent)
A. High speed steel                               1. Carbon
B. Stellite                                                2. Molybdenum
C. Diamond                                            3. Nitride
D. Coated carbide tool                           4. Columbium
                                                               5. Cobalt
Codes: A B C D                              A B C D
        (a) 2 1 3 5                           (b) 2 5 1 3
         (c) 5 2 4 3                           (d) 5 4 2 3

Match List I (Alloy) with List II (Major Constituent) and select the correct answer using the code given below the Lists: 
List I                                                            List II
A. Babbitt                                               1. Nickel
B. Invar                                                  2. Tin and lead
C. Gun Metal                                         3. Aluminium
D. Duralumin                                         4. Copper
Code: A B C D                                A B C D
     (a) 2 4 1 3                             (b) 3 1 4 2
     (c) 2 1 4 3                             (d) 3 4 1 2

Invar is used or measuring tapes primarily the to its

The straight grades of cemented carbide cutting tool materials contain 

Match List-I with List-II and select the correct answer using the codes given below the Lists:  
List I                                                        List II
(Materials)                                         (Applications)
A. Tungsten carbide                         1. Abrasive wheels
B. Silicon nitride                               2. Heating elements
C. Aluminium oxide                          3. Pipes for conveying liquid metals
D. Silicon carbide                             4. Drawing dies
Code: A B C D                          A B C D
     (a) 3 4 1 2                       (b) 4 3 2 1
      (c) 3 4 2 1                      (d) 4 3 1 2

For improving the strength of steel at elevated temperatures, which one of the following alloying element is used?  

Cubic boron nitride is used  

Addition of which of the following improves machining of copper? 

Consider the following statements: An increase in the cobalt content in thestraight carbide grades of carbide tools 
1. Increases the hardness.
2. Decreases the hardness.
3. Increases the transverse rupture strength
4. Lowers the transverse rupture strength.
Which of the statements given above are correct?

Which one of the following is not a ceramic?  

Which one of the following elements is an austenitic stabilizer? 

Which of the following elements given below determine(s) the maximum attainable hardness in steel? 
1. Chromium
2. Manganese
3. Carbon
4. Molybdenum
elect the correct answer using the code given below:

Consider the following tool materials:  
1. HSS
2. Cemented carbide
3. Ceramics
4. Diamond
The correct sequence of these materials in decreasing order of their cutting speed is

Which one of the following elements is a ferritic stabilizer? 

Cermets are 

Small percentage of boron is added to steel to 

Assertion(A): In high speed steels, alloying elements tungsten, chromium andvanadium are added to make them suitable to work at higher speeds than toolsteel or low alloy steels.Reason(R): Vanadium adds to the property of red hardness and tungsten andchromium add to high wear resistance. 

A machinist desires to turn a round steel stock of outside diameter 100 mm at 1000rpm. The material has tensile strength of 75 kg/mm². The depth of cut chosen is 3mm at a feed rate of 0.3 mm/rev. Which one of the following tool materials will be suitable for machining the component under the specified cutting conditions?  

Which of the following methods are suitable for the production of super alloys?
1. Atomization from molten state using inert gas.  
2. Atomization using plasma arc and rotating electrode.
3. Reduction and crushing.
Select the correct answer using the codes given below:Codes:

Consider the following tool materials: 
1. Carbide
2. Cermet
3. Ceramic
4. Borazon.
Correct sequence of these tool materials in increasing order of their ability to retain theirhot hardness is