Which of the following is true about Natural Convection? – McqOptions

MCQOPTIONS

1.	Which of the following is true about Natural Convection?
A.	Low heat transfer
B.	Due to gravity and natural buoyant forces
C.	Dependent on viscosity, density and thermal conductivity
D.	All of the mentioned
Answer» E.

Discussion

No Comment Found

Related MCQs

Statement 1: Difference between 1-1 and 1-2 heat exchanger is that 1-2 has both counter AND co current, whereas 1-1 has only co-current.Statement 2: 1-2 heat exchanger requires a high pressure drop.
Penetration depth of food refers to the depth inside the food inside which the heat generation drops to 37%.
Any food item should be subjected to micro frequencies such that, the dielectric constant is _____ and loss factor is _____
In a jacketed vessel, the only way to increase the heat transfer rates is to increase the temperature difference.
Statement 1: Unsteady state heat transfer equation can be used when there is negligible internal resistance.Statement 2: Unsteady state heat transfer equation can be used for liquid food items which are well stirred, because, temperature gradient within won’t be there.
Statement 1: Radiation is NOT heat.Statement 2: Maximum value of absorptivity is 1.
If _______ heating has higher heat transfer rates than _______ heating, then why is ________ difficult to be used.
Which of the following heat exchangers are used for the quick exchange of heat?
Which of the following is an advantage of using pumps as heat transfer equipment?
Statement 1: In coiled heat exchanger, the coils can be present inside and outside the vessel.Statement 2: The coils can have either hot/cold fluid present inside them or even electrical coils can be present.