Heat Transfer Questions

Q.  Suppose that a hot metal ball is suddenly immersed in cold water. What is the condition for the ball to maintain it at a uniform temperature?

a. the conduction resistance in a ball should be very large compared to the convection resistance for heat transfer from surface of ball to water
b. the conduction resistance in a ball should be very small compared to the convection resistance for heat transfer from surface of ball to water
c. the conduction resistance in a ball should be equal to the convection resistance for heat transfer from surface of ball to water
d. cannot say


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  How is the cooling at night in coastal areas?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The radiation energy from the sun is produced by
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The rate at which the solar energy reaching the earth's atmosphere is called as
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The radiation from fusion of hydrogen
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  What is the purpose of using baffles in shell-and-tube heat exchangers?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Large sized and heavy shell-and-tube heat exchangers are suitable for
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Which side is suitable to provide fins on to enhance heat transfer, when heat exchanges between gas and liquid?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The scales form in heat exchangers after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient. The reciprocal of this scale heat transfer coefficient is called as
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Fouling factor of a heat exchanger can be calculated by
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Which fluid is used in hydraulic power systems?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Why is fluid power preferred in mobile vehicles? 1. Power can be transmitted without any delay 2. When overloaded, fluid power systems stop without damaging the components 3. Speed variation cannot be achieved 4. Fluid is non-compressible
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  What effect does overloading have on fluid power and electrical systems?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  How is power transmitted in fluid power systems?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Generally liquids are non-compressible but when a large pressure of 70 bar is applied, petroleum oil can be compressed up to
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Can all hydraulic fluids be compressed when extremely large pressure is applied?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The resistance offered to the flow of fluid inside a piston develops into
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  At low pressures, liquids are
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Which of the following statements are false? 1. Pressure is resistance to flow 2. Friction creates pressure 3. Load cannot create pressure on the system 4. The pressure developed decreases if load offers more resistance
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  In hydraulic systems,
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Which of the following is used as a component in hydraulic power unit?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts