Creep is not exhibited at low temperature by _____________________?

Related Mcqs:

1. Polymorphism is not exhibited by______________________?

   A. Carbon
   B. Iron
   C. Phosphorous
   D. None of these

2. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ?

   A. Invar
   B. Constantan
   C. Chromel
   D. Alumel

3. The temperature at which new grains are formed in the metal is called the ______________ temperature?

   A. Eutectic
   B. Recrystallisation
   C. Upper critical
   D. Lower critical

4. _____________________ is used for determining the tensile strength of steels ?

   A. Hydraulic press
   B. Universal testing machine
   C. Mechanical press
   D. None of these

5. A steel alloy containing 36% nickel is called _____________________, which has a zero co-efficient of expansion?

   A. Austenitic stainless steel
   B. Heat resisting steel
   C. Invar
   D. High speed steel

6. Stainless steel is not corroded by _____________________?

   A. Hydrochloric acid (10%)
   B. Nitric acid (10%)
   C. Sulphuric acid (10%)
   D. Saturated brine

7. 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

8. Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysteresis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?

   A. Armature of small motors/generators
   B. Generators and small motors
   C. Induction motors
   D. High frequency transformers

9. _____________ is added in low carbon steel to raise its yield point?

   A. Sulphur
   B. Phosphorous
   C. Silicon
   D. Manganese

10. Polythene (low or high density) containers are not corroded by___________________?

    A. Sulphuric acid (10%) at room temperature
    B. Nitric acid (95%) at room temperature
    C. Sulphur trioxide at 60°C
    D. Any of these