Question 402General Subjects - Assistant Engineer
70% to passWhen repacking a reciprocating pump with more than four rings of packing, the packing is cut square, installed with the ends abutted, and each succeeding ring staggered with the butted ends _______________.
A45° apart
B90° apart
C120° apart
D180° apart
AI Explanation
The correct answer is B) 90° apart. When repacking a reciprocating pump with more than four rings of packing, the packing is cut square, installed with the ends abutted, and each succeeding ring staggered with the butted ends 90° apart. This staggered arrangement helps to evenly distribute the pressure and wear on the packing, ensuring a better seal and longer service life of the pump. The other options are incorrect because: A) 45° apart would not provide enough staggering, C) 120° apart would leave some gaps unprotected, and D) 180° apart would defeat the purpose of staggering the packing rings.
Related Questions
Q640:In machine shop practice, a center gage is used for checking the angle of ______... Q532:As it pertains to a "constant-tension" mooring winch, what statement is true? ... Q461:What type of HVAC system is characterized by poor air distribution and ventilati... Q73:After adding grease to a ball bearing with a hand-held grease gun, you should __... Q431:A constant pressure range is maintained in the potable water system of many vess...
Ready to test your knowledge?
Take a General Subjects - Assistant Engineer Practice ExamOfficial Resources