Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented

When the bearing becomes dry from lack of oil, the motor shaft may heat to ______ an extent ______ it welds itself to the bearing.

The compressor in an air－cooled condensing refrigeration system is short cycling on the hi

Air blowing from the intake air filter of an operating air compressor indicates ______.A.b

If an air compressor is used to supply air primarily to the combustion control system and

_____ supplies pilot air to control the cylinder air start valves.A.An air compressorB.An

When an airplane flies too high ______.A.the air