In a plate type heat exchanger, heat transfer plates are never made of _________________?
A. Stainless steel
B. Cast iron
C. Titanium
D. Hastelloy C
Materials and Construction
Spray dryer for evaporating milk to produce milk powder is made of_________________?
Spray dryer for evaporating milk to produce milk powder is made of_________________?
A. Lead lined steel
B. Stainless steel
C. Aluminium
D. Cast iron
Rubber lined vessels are corroded by the action of__________________?
Rubber lined vessels are corroded by the action of__________________?
A. Aqua regia
B. Chloroform
C. Sulphuric acid (95%)
D. All A., B. and C.
Wrought iron is ____________________?
Wrought iron is ____________________?
A. High carbon iron
B. Highly resistance to acid corrosion
C. Malleable & ductile; and hence is used for chain links, hooks & couplings
D. An alloy of iron, chromium & carbon
Alpha iron is stable ______________ °C?
Alpha iron is stable ______________ °C?
A. Above 1403
B. Upto 910
C. Above 1800
D. Between 910 & 1403
The softest material in Mho’s scale (for measuring hardness) is________________?
The softest material in Mho’s scale (for measuring hardness) is________________?
A. Talc
B. Gypsum
C. Rubber
D. None of these
Cold work tool steel should have_________________?
Cold work tool steel should have_________________?
A. High toughness
B. Poor hardenability
C. High wear resistance
D. All A., B. & C.
Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium_______________?
Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium_______________?
A. Tin, nickel, iron and chromium
B. And graphite
C. And copper
D. None of these
An alloy of iron containing 4% carbon is called________________?
An alloy of iron containing 4% carbon is called________________?
A. High carbon steel
B. Wrought iron
C. Mild steel
D. None of these
_____________ is used for examining the macro-structure of a material?
_____________ is used for examining the macro-structure of a material?
A. Metallurgical microscope
B. Optical microscope
C. X-rays
D. Visual inspection by naked eye