单选题A reciprocating air compressor is running roughly and vibrating excessively, indicating that the （）.Acompressor is overloadedBmotor is overloadedCfoundation bolts are looseDbelts are too tight
单选题
A reciprocating air compressor is running roughly and vibrating excessively, indicating that the （）.
A
compressor is overloaded
B
motor is overloaded
C
foundation bolts are loose
D
belts are too tight
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