Related Questions

The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to
A Grey cast iron
B White cast iron
C Mottled cast iron
D Toughed cast iron
Which of the following tests measures the toughness of road aggregates ?
A crushing strength test
B abrasion test
C impact test
D shape test
Toughness of a material is measured by the
A Vicker's hardness test
B Scratch test
C Universal testing machine
D Notched bar test
The most serious manufacturing defect from fracture toughness point of view is
A surface roughness
B pore
C spherical inclusion
D crack
The toughness of a material _________ when it is heated
A Does not change
B Increases
C Decreases
D None of the Above
The toughness of a material __________ when it is heated.
A Remain same
B Decreases
C Increases
D None of these
Nickel and __________ are the alloying element added in steel to increase its toughness.
A Molybdenum
B Chromium
C Vanadium
D Silicon
High degree of toughness is a must for
A High speed steel
B Shock resisting steel
C Cold work tool steel
D None of these
A measure of toughness of a material is its
A Percentage elongation
B Yield strength
C Ultimate strength
D Area under stress-strain diagram
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser?
A Ethylene glycol
B Stearic acid estors
C Tricresyl phosphate
D Esters of phthalic acid

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