A. Nichrome
B. Kanthal
C. Invar
D. None of these
Related Mcqs:
- In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________?
A. Conduction
B. Radiation
C. Natural convection
D. Forced convection - Nickel and ______________ are the alloying element added in steel to increase its toughness?
A. Molybdenum
B. Chromium
C. Vanadium
D. Silicon - Dies for wire drawing are generally made of__________________?
A. Mild steel
B. Stainless steel
C. Carbides
D. High carbon steel - The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is___________________?
A. Full annealing
B. Bright annealing
C. Patenting
D. None of these - Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is ________________ mm?
A. 15
B. 25
C. 10
D. 30 - Wrought iron is never shaped by__________________?
A. Casting
B. Cold working
C. Forging
D. Welding - Heating of ferromagnetic materials to a temperature above Curie temperature makes it ________________________?
A. Insulator for heat & electricity transmission
B. Ferritic
C. Behave like paramagnetic materials
D. Superconductor - Super heating of steam is done at constant___________________?
A. Enthalpy
B. Entropy
C. Pressure
D. Volume - Transformation range for ferrous material is the temperature interval during which ___________________ is formed during its heating?
A. Cementite
B. Austenite
C. Martensite
D. Pearlite - During sensible heating of humid air__________________?
A. Relative humidity increases
B. Dew point remains constant
C. Dry bulb & wet bulb temperature increases
D. Both B & C
