Acetaldehyde is shipped in ____________ drums?
A. Cast iron
B. Steel
C. Aluminium
D. Either B. & C.
Materials and Construction
Rotary driers are generally made of_______________?
Rotary driers are generally made of_______________?
A. Cast iron
B. Mild steel
C. High silicon iron (14% Si)
D. Tin lined with refractory bricks
Fatigue failure of a material may occur, when it is subjected to _____________ stress?
Fatigue failure of a material may occur, when it is subjected to _____________ stress?
A. Fluctuating
B. Tensile
C. Compressive
D. Torsion
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?
A. Silicon
B. Phosphorus
C. Sulphur
D. None of these
Hardest materials so far found is_________________?
Hardest materials so far found is_________________?
A. Diamond
B. Graphite
C. Carborundum
D. Pumice stone
The presence of impurities in iron_________________?
The presence of impurities in iron_________________?
A. Increases its melting point
B. Does not affect its melting point
C. Decreases its melting point
D. Makes it malleable
Molybdenum steels containing 0.15 to 0.40% molybdenum___________________?
Molybdenum steels containing 0.15 to 0.40% molybdenum___________________?
A. Are prone to temper brittleness
B. Are used for automobile parts like gears, axle, shaft, bearings etc.
C. Have very poor fatigue resistance
D. Do not contain nickel or chromium or both
Carbon is present in the uncombined (graphitic) form in case of__________________?
Carbon is present in the uncombined (graphitic) form in case of__________________?
A. Cast iron
B. Steel
C. Ferroalloy
D. None of these
Nickel and molybdenum are the basic constituents of___________________?
Nickel and molybdenum are the basic constituents of___________________?
A. Hastelloy
B. German silver
C. Inconel
D. Solder
Constantan used in thermocouples is an alloy of___________________?
Constantan used in thermocouples is an alloy of___________________?
A. Iron & copper
B. Copper & aluminium
C. Lead & tin
D. None of these