Related Questions

Presence of small quantity of sulphur in low carbon steel improves its
A Formability
B Machinability
C Weldability
D Hardenarality
Presence of nickel in steel improves its
A Corrosion resistance
B Cutting ability
C Wear resistance
D All of the above
Presence of manganese in alloy steel improves its
A Corrosion resistance
B Cutting ability
C Abrasion resistance & toughness
D Elasticity & creep resistance
Cobalt in steel
A increases hardness
B decreases toughness
C increases strength
D all of these
Alinco, which is a aluminium-cobalt-nickel steel, is used for making
A Surgical instruments
B Powerful magnets
C Chemical equipments
D Boiler tubes
In low carbon steels, presence of small quantities of sulphur improves
A Weldability
B Formability
C Machinability
D Hardenability
Hardness of steel greatly improves with
A Annealing
B Cyaniding
C Normalizing
D Tempering
The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
A 768
B 1127
C 1359
D 1480
A steel mill produces 180 tons of steel per month Raw materials cost for each ton of production is Tk. 1200. Other expenses of that mill are Tk. 90,000 in each month what should be the selling price of each ton of steel in order to make 10% profit?
A 1870
B 1845
C 1842
D 18145
10 cm লম্বা ও 0.5 cm ব্যাসার্ধ বিশিষ্ট একটি তামা ও একটি লোহার তারকে জোড়া লাগিয়ে দৈর্ঘ্য 20 cm করা হল। জোড়া লাগানো তারটিকে বল প্রয়োগ করে লম্বা করা হল। লোহার ইয়ংয়ের গুণাঙ্ক তামার ইয়ংয়ের গুণাঙ্কের দুইগুণ হলে লোহার দৈর্ঘ্য বৃদ্ধি ও তামার দৈর্ঘ্য বৃদ্ধির অনুপাত কত? ( A steel and a brass wire, both having 10 cm length and 0.5 cm radius, are joined together making the total length of the combined wire 20 cm. The combined wire is stretched by applying a force. If the Young's modulus of steel is twice as much as that of brass, what will be the ratio of the extension of steel to the extension of brass?)
A 1 :8
B 1 : 6
C 1 : 4
D 1 : 2

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