Hot working of lead is carried out at_________________?

Related Mcqs:

1. Lead pipes are not safe for carrying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2. Lead pipes are readily corroded by___________________?

   A. Dilute HCl
   B. Acetic acid
   C. Concentrated H2SO4
   D. None of these

2. Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by_________________?

   A. Dilute HCI
   B. Acetic acid
   C. Concentrated H2SO4
   D. None of these

3. In cold working of metal as compared to its hot working____________________?

   A. Cracks and blow holes are eliminated
   B. Ductility and impact strength improves
   C. Appreciable strain hardening is produced
   D. Yield stress, hardness and fatigue strength is not at all affected

4. Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower_________________?

   A. Price
   B. Corrosion resistance
   C. Thermal conductivity
   D. Abundant availability

5. In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________?

   A. Copper
   B. Platinum
   C. Constantan
   D. Chromium

6. Maximum consumption of lead is in the manufacture of _________________________?

   A. Storage batteries
   B. Solder alloys
   C. Electric cable sheathing
   D. Lead lined vessels

7. Lead lined equipments & vessels are suitable for handling __________________?

   A. Hydrochloric acid (10%)
   B. Nitric acid
   C. Sulphuric acid upto 60°C
   D. All A., B. and C.

8. Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its__________________?

   A. Corrosion resistance
   B. Tensile strength
   C. Machinability
   D. Compressive strength

9. For platinum thermocouples, lead wires are made of___________________?

   A. Copper & copper-nickel alloys
   B. Copper & iron
   C. Iron & nickel
   D. Tin & nickel

10. Lead is_____________________?

    A. Not resistant to corrosion
    B. Used as a cathodic material
    C. Not used as pigment (in its compound forms) for paints
    D. Used as a shock absorber (in mattress form) between the foundation and steel framework of
    skyscraper buildings