Most important property of steels for use in automobile bodies is the___________________?

Related Mcqs:

1. 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

2. Hydrogen in liquid steels is dissolved_________________?

   A. As tiny gas bubbles
   B. In the atomic form
   C. In the ionic form
   D. In the molecular form

3. Machinability of hard alloys and tool steels is improved by_____________________?

   A. Spheroidising
   B. Annealing
   C. Tempering
   D. Normalising

4. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?

   A. Tempering
   B. Hardening
   C. Annealing
   D. Normalising

5. Fine grained steels have____________________?

   A. High brittleness
   B. Higher tendency to distort
   C. High ductility
   D. None of these

6. Earing is a defect found in steels after the following metal working operation ?

   A. Extrusion
   B. Rolling
   C. Deep drawing
   D. Wire drawing

7. Coarse grained steels have____________________?

   A. Low toughness
   B. No tendency to distort
   C. High density
   D. Very high toughness

8. A reduction in thermal resistance during heat transfer does not occur in the___________________?

   A. Convection heat transfer by stirring the fluid and cleaning the heating surface
   B. Conduction heat transfer by reduction in the material thickness and increase in the thermal
   conductivity
   C. Radiation heat transfer by increasing the temperature and reducing the emissivity
   D. None of these

9. The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the___________________?

   A. Final control element
   B. On-off control
   C. Floating control action
   D. None of these

10. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the___________________?

    A. Length of the pipe
    B. Diameter of the pipe
    C. Density of the fluid
    D. Velocity of the fluid