A. Ultraviolet radiation
B. High atmospheric temperature
C. High ambient temperature
D. Damp atmosphere
Related Mcqs:
- In ________________ process, there is an increase in entropy with no degradation of energy ?
A. Isothermal expansion
B. Isochoric heat addition
C. Polytropic expansion
D. Isobaric heat addition - Plastics as a material of construction suffer from the drawback of low_________________?
A. Machinability
B. Density
C. Strength
D. Plastic deformation - Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ?
A. 5
B. 10
C. 20
D. 35 - In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the________________?
A. Range is 15°F
B. Approach is 10°F
C. Both A. & B.
D. Neither A. nor B. - Carnot cycle is also termed as the constant _________________ cycle in thermodynamics?
A. Entropy
B. Pressure
C. Volume
D. Heat - _________________ is the most suitable lubricant for drawing mild steel wires?
A. Kerosene
B. Water
C. Sodium stearate
D. Lime water - Iron content in Indian iron ore is about _________________ percent?
A. 80-85
B. 60-65
C. 40-45
D. 20-25 - _________________ furnace is generally used in the non-ferrous foundries ?
A. Direct arc
B. Indirect arc
C. Resistance
D. Induction - _________________ is not used as a material of construction in thermocouples ?
A. Alumel
B. Rhodium
C. Constantan
D. Duralumin - _________________ is not a heat treatment process ?
A. Cyaniding
B. Parkerizing
C. Austempering
D. Martempering
