Mechanical Engineering MCQs

A. A dimensionless parameter
B. Function of temperature
C. Used as mathematical model
D. A physical property of the material

A. Mositure
B. Density
C. Temperature
D. All of the above

A. Equivalent thickness of film
B. Thermal conductivity equivalent thickness of film specific heat x viscocity
C. Thermal conductivity molecular diffusivity of momentum thermal diffusivity
D. Film coefficient x inside diameter thermalconductivity

A. M2/hr
B. M2/hr°c
C. Kcal/m2 hr
D. Kcal/m.hr°c

A. Convection
B. Radiation
C. Conduction
D. Both convection and conduction

A. Emissivity
B. Transmissivity
C. Reflectivity
D. Intensity of radiation

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

A. Thermal resistance
B. Thermal coefficient
C. Temperature gradient
D. Thermal conductivity

A. 1 :1
B. 2: 1
C. 1 : 2
D. 4 : 1

A. Higher
B. Lower
C. Same
D. Depends upon the shape of body