The main constituent of carborundum is ___________________ carbide?
A. Calcium
B. Silicon
C. Boron
D. Aluminium
Materials and Construction
Carbon tetrachloride can be stored in a storage vessel made of________________?
Carbon tetrachloride can be stored in a storage vessel made of________________?
A. High silicon iron (14% Si)
B. Tin
C. Stainless steel
D. All A., B. and C.
Approximate value of the modulus of elasticity for steel is about _____________ × 106kg/cm2?
Approximate value of the modulus of elasticity for steel is about _____________ × 106kg/cm2?
A. 0.5
B. 2
C. 40
D. 75
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%) ?
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
Mercury is transported in metal containers made of________________?
Mercury is transported in metal containers made of________________?
A. Aluminium
B. Iron
C. Lead
D. Nickel
Teflon (PTFE) is corroded by_______________?
Teflon (PTFE) is corroded by_______________?
A. Hydrochloric acid (10%)
B. Hydrochloric acid (95%)
C. Sulphuric acid
D. None of these
Liners of a ball mill are never made of__________________?
Liners of a ball mill are never made of__________________?
A. Lead
B. Alloy steel
C. Rubber or ceramic material
D. Cast iron
Which of the following undergoes granular fracture ?
Which of the following undergoes granular fracture ?
A. Wrought iron
B. Steel
C. Cast iron
D. None of these
Reactor used in the production of polyvinyl chloride (PVC) is made of____________________?
Reactor used in the production of polyvinyl chloride (PVC) is made of____________________?
A. Nickel or glass lined steel
B. Aluminium
C. Tantalum
D. Lead
Presence of manganese in alloy steel improves its___________________?
Presence of manganese in alloy steel improves its___________________?
A. Corrosion resistance
B. Cutting ability
C. Abrasion resistance & toughness
D. Elasticity & creep resistance