This set of Heat Transfer Puzzles focuses on “Number Of Transfer Units”. 1. Pick the odd one out a) Open feed water heaters b) Jet condensers c) De-super heaters d) Surface condensers 2. The lubricating oil for a large industrial gas turbine engine is cooled in a counter flow, concentric tube heat exchanger. The cooling … Read more
This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Heat Exchanger Effectiveness”. 1. Capacity ratio is defined as the product of a) Mass and temperature b) Mass and specific heat c) Specific heat and temperature d) Time and temperature 2. A single pass shell and tube heat exchanger, consisting of a … Read more
This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Von- Karmal Equation”. 1. Glycerin at 10 degree Celsius flows past a flat plate at 20 m/s. Workout the velocity components at a point P(x, y) in the fluid flow where x = 2 m from the leading edge of the plate … Read more
This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Solar Absorptivity”. 1. Which one is having the highest value of solar absorptivity? a) White marble b) Concrete c) Asphalt d) Snow 2. What is the value of solar absorptivity for aluminum foil? a) 0.15 b) 0.16 c) 0.17 d) 0.18 3. … Read more
This set of tough Heat Transfer Questions focuses on “Thermal Conductivity Of Different Materials”. 1. What is the thermal conductivity of asphalt in W/m K? a) 0.064 b) 0.063 c) 0.062 d) 0.061 2. Which one is having the highest thermal conductivity? a) Silver b) Copper c) Glass d) Earth 3. What is the thermal … Read more
This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Hydrodynamic Boundary Layer”. 1. The concept of the hydrodynamic boundary layer was first suggested by a) Isaac Newton b) Ludwig Prandtl c) Rodridge d) Fourier 2. The free stream undisturbed flow has a uniform velocity U INFINITY in the a) X-direction b) … Read more
This set of tough Heat Transfer Questions & Answers focuses on “Heat Flux Through A Cylindrical Wall And Plate”. 1. When two fluids of the heat exchanger are separated by a plane wall, the thermal resistance comprises (i) Convection resistance due to the fluid film at the inside surface (ii) Conduction resistance (iii) Convection resistance … Read more
This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Heat Transfer Coefficient”. 1. Which one is having highest value of overall heat transfer coefficient? a) Steam condensers b) Feed water heaters c) Alcohol condensers d) Steam 2. What is the value of overall heat transfer coefficient for air to heavy tars … Read more
This set of tricky Heat Transfer Questions & Answers focuses on “Turbulent Film Condensation”. 1. Which parameter is responsible for the commencement of the turbulent flow? a) Fourier number b) Reynolds number c) Stanton number d) Nusselt number 2. The transition from laminar to turbulent flow occurs at a critical Reynolds number of a) 1800 … Read more
This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Specific Heat”. 1. What is the value of specific heat for brick in J/kg K? a) 835 b) 735 c) 635 d) 535 2. Which one is having the highest value of specific heat? a) Asphalt b) Bakelite c) Chrome brick d) … Read more
