A. Is an electrical insulating material
B. Of low resistivity is preferred
C. Should have high thermal conductivity
D. Need not defy the corrosive action of chemicals
Related Mcqs:
- Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by _____________ have residual stresses ?
A. Forging
B. Cold rolling
C. Hot rolling
D. Casting - What is the pH of distilled water ?
A. 0
B. 1
C. 7
D. 14 - Which of the following are considered applications of ultrasonic testing ?
A. Determination of elastic constant
B. Detection of defects in metal
C. Measurement of material thickness
D. None of the above - Name the safety device used to protect the boiler, when the water level falls below a minimum level ?
A. Blow down valve
B. Blow off cock
C. Fusible plug
D. Safety valve - Consumable electrodes are used in the ____________________ welding?
A. Gas
B. Arc
C. Thermit
D. Resistance - The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?
A. 130
B. 180
C. 230
D. 250 - The life of a ball bearing is inversely proportional to________________?
A. (Load)1
B. (Load)2
C. (Load)3
D. (Load)0.33 - _________________ is not used as a material of construction in thermocouples ?
A. Alumel
B. Rhodium
C. Constantan
D. Duralumin - Euler number is defined as the ratio of inertia force to _______________ force?
A. Pressure
B. Elastic
C. Gravity
D. Viscous - 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
