A. Conductor
B. Insulator
C. Semi-conductor
D. None of these
Related Mcqs:
- The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the ‘Curie temperature’. Its value for cobalt is ______________ °C?
A. 768
B. 1127
C. 1359
D. 1480 - High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from _______________ percent ?
A. 5 to 10
B. 15 to 25
C. 45 to 50
D. 75 to 80 - Electrical conductivities of semi-conductors are of the order of ______________ ohm/cm ?
A. 10-3
B. 103
C. 10-15
D. 1015 - Materials having ________________ lattice structure are usually the most ductile ?
A. Body centred cubic (bcc)
B. Hexagonal close packed (hcp)
C. Face centred cubic (fcc)
D. None of these - Tumbling is the process of improving the ________________ of the materials/parts ?
A. Surface finish
B. Fatigue limit
C. Creep limit
D. Surface cleanliness - Which of the following materials has the least scrap value ?
A. Aluminium
B. Stainless steel
C. Brass
D. Copper - Which of the following is the most suitable abrasive for grinding high tensile strength materials ?
A. Silicon carbide
B. Corundum
C. Aluminium oxide
D. Boron carbide - Which of the following commonly used condenser tube materials has the lowest thermal conductivity ?
A. Admiralty brass
B. Stainless steel
C. Aluminium brass
D. Titanium - Isotropic materials have the same _______________________ in all directions?
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties - Which of the following materials does not form adherent oxide film on surface ?
A. Copper
B. Nickel
C. Aluminium
D. Gold & silver
