What type of sealing arrangement for pumps is composed of two flat surfaces, one stationary and one rotating with the shaft, that are in close contact with each other to create a seal and prevent leakage?
A. Mechanical packing
B. Mechanical seal
C. Physical seal
D. Physical packing
A. Incorrect. Mechanical packing is a sealing arrangement used in nontoxic, nonflammable, and nonpolluting applications.
B. Correct. A mechanical seal is composed of two flat surfaces (faces), one stationary and one rotating with the shaft, that are in close contact with (nearly touching) each other to create a seal and prevent leakage.
C. Incorrect. A physical seal is not a type of sealing arrangement for pumps.
D. Incorrect. Physical packing is not a type of sealing arrangement for pumps.
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