What is meant by lower flammable limit (LFL)?
What will be an ideal response?
The LFL is the minimum concentration in ppm of flammable liquid vapor in air that will support the propagation of flame upon contact with an ignition source. A liquid vapor / air mixture can be too lean (not enough – low ppm) to burn below the LFL, or too rich (too much – high ppm) to burn above the upper flammable limit
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What will be an ideal response?
Which structural feature of the heart is a deep groove, usually filled with substantial amounts of fat, marking the border between the atria and the ventricles?
A) posterior interventricular sulcus B) coronary sulcus C) anterior interventricular sulcus D) coronary sinus E) interventricular septum
The main purpose of adding a humidifier to a heating system is to replace the moisture that is removed by the heating equipment.
Answer the following statement true (T) or false (F)
The steering knuckle on a rack-and-pinion system is very similar to the parallelogram system.
Answer the following statement true (T) or false (F)