A low temperature evaporator always operates below freezing and the box is always below freezing as well. How is defrost accomplished?
What will be an ideal response?
A source of heat is needed, such as hot gas or electric.
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Which statements are TRUE about wire, terminals, and connectors?
A) A lead and a terminal are the same thing B) A connector is usually a plastic piece where terminals lock in C) A wire is called a lead, and the metal end is a connector D) Both A and C
Answer the following statement(s) true (T) or false (F)
1. Fuel cells have several moving parts. 2. Molten Carbonate Fuel Cell (MCFC) systems operate at relatively low temperatures. 3. Solid Oxide Fuel Cell (SOFC) systems are unusual in that the fuel cell itself is entirely solid. 4. SOFC electrolytes are ceramics that conduct ions at elevated temperatures. 5. Fuel reformation is an endothermic reaction.
____ light can cause burns, but a person will immediately feel this type of light.
A. Ultraviolet B. Infrared C. Visible D. Spectral
An electric current of 5 A passing through a resistor has a measured voltage of 6 V across the resistor. The resistor is cylindrical with a diameter of 2.5 cm and length of 15 cm. The resistor has a uniform temperature of 90°C, and the room air temperature is 20°C. Assuming that heat transfer by radiation is negligible, determine the heat transfer coefficient by convection.
What will be an ideal response?