QUESTION 21 Cells that store food and transport it horizontally are called...? o

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QUESTION 21 Cells that store food and transport it horizontally are called...? o tracheids vessels o parenchyma fibres QUESTION 22 Incre asing carbon content of steel will result in which of the following? O an increase in ductility limiting the slip planes in the lattice steel will be easier to weld coarser grain structure QUESTION 23 What is used to predict the low temperature ductile to brittle transition fracture energy of steel? O impact test o calculation based on ratio of grain size to pearlite content O calculation based on weighted % contents of alloy elements tensile test QUESTION 24 Which of the following is true about steel manufacture? most structural steel and rebar is cold rolled steel is made in the blast furnace steel is made in a basic oxygen or electric arc furnace increased carbon content increases toughness

Explanation / Answer

21) parenchyma transport food horzonatally. So, option C is coorect choose.

22) Increasing carbon content will reduce ductility and weldablity. And it limit the slip planes in the lattice. So, option B is correct.

23) Optin C is correct. Weighted % contents of alloy elemts is used to find the low temperature ductile to brittle transition fracture energy of steel

24) Increaseing carbon content wil increase toughness, brittleness. So, option D is correct.

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