- (A) glass
- (B) water
- (C) plastic
- (D) rubber
- (E) air
Mechanical Engineering Mcqs
- (A) radiant heat is proportional to fourth power of absolute temperature
- (B) emissive power depends on temperature
- (C) emissive power and absorptivity are constant for all bodies
- (D) ratio of emissive power to absorptive power is maximum for perfectly black body
- (E) ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body
- (A) better insulation should be put over pipe and better one over it
- (B) inferior insulation should be put over pipe and better one over it
- (C) both may be put in any order
- (D) whether to put inferior OIL over pipe or the better one would depend on steam temperature
- (E) unpredictable
- (A) cold water inlet and outlet
- (B) hot medium inlet and outlet
- (C) hot medium outlet and cold water inlet
- (D) hot medium outlet and cold water outlet
- (E) none of the above
- (A) Grashoff number
- (B) Nusselt number
- (C) Weber number
- (D) Prandtl number
- (E) Reynold number
- (A) higher
- (B) lower
- (C) same
- (D) depends upon the shape of body
- (E) none of the above
- (A) 1 :1
- (B) 2: 1
- (C) 1 : 2
- (D) 4 : 1
- (E) 1 : 4
- (A) thermal resistance
- (B) thermal coefficient
- (C) temperature gradient
- (D) thermal conductivity
- (E) heat-transfer
- (A) varies with temperature
- (B) varies with wavelength of the incident ray
- (C) is equal to its emissivity
- (D) does not vary with temperature and. wavelength of the incident ray
- (E) none of the above
- (A) emissivity
- (B) transmissivity
- (C) reflectivity
- (D) intensity of radiation
- (E) absorptivity
