Related Questions

'Killed steels' are those steels
A Which are destroyed by burning
B Which after their destruction are recycled to produce fresh steel
C Which are deoxidized in the ladle with silicon and aluminium
D In which carbon is completely burnt
For hardening alloy steels and high speed steels, they are heated to
A 1100 to 1300°C
B 1300 to 1500°C
C 500 to 600°C
D 700 to 900°C
Steels with high carbon equivalent have poor weldability, because in these steels during welding
A Carbon and other alloying elements get oxidised from the weld pool
B Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld
Ferric stainless steels compared to austenitic stainless steels
A Have lower corrosion resistance
B Are harder to fabricate
C Are less ductile and hence less suitable for cold pressing
D All of the above
Studies of fatal automobile accidents reveal that , in the majority of cases in which one occupant of an automobile is killed another survives, it is the passenger , not the driver , who is killed. It is ironic that the innocent passenger should suffer for the driver's carelessness, while the driver often suffers only minor injuries or none at all. Which of the following is an assumption underlying the reasoning in the passage above?
A In most fatal automobile accidents , the driver of a car in which an occupant is killed is at fault .
B Most deaths in fatal automobile accidents are suffered by occupants of cars rather then by pedestrians .
C Auto safety experts should increase their efforts to provide protection for those in the passenger seats of automobiles
D Automobile passengers sometimes play a contributing role in causing auto accidents
Which of the following material is not used in alloy steels?
A Molybdenum
B Nickel
C Chromium
D Sodium
Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?
A Sulphur
B Phosphorus
C Manganese
D Silicon
In low carbon steels, presence of small quantities of sulphur improves
A Weldability
B Formability
C Machinability
D Hardenability
Shock resisting steels should have
A Low wear resistance
B Low hardness
C Low tensile strength
D Toughness
In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.
A Sulphur
B Phosphorus
C Manganese
D Silicon

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