Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG General Subjects (Auxiliaries & Systems) (Set 7)

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Question 1 of 30

A pounding noise occurring in one cylinder of a steam reciprocating general service pump could be caused by __________.

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30 MCQs

#1 A pounding noise occurring in one cylinder of a steam reciprocating general service pump could be caused by __________. #2 Which of the following conditions would prevent a steam reciprocating pump from delivering its rated capacity? #3 Liquid is kept from leaking out at the shaft ends of a helical gear pump by __________. #4 Which of the listed parts is used in a lobe-type rotary pump to allow for wear on the lobe edges? #5 The output volume of a positive fixed displacement pump can be changed only by __________. #6 Positive displacement, helical gear pumps are well suited for pumping oil because __________. #7 The capacity of a gear type rotary pump, when operated at a constant speed, will decrease with an increase in the pump __________. #8 A spur gear pump should be operated with the discharge valves __________. #9 How does the viscosity of a fluid being pumped affect the operation of a spur gear pump? #10 Why is the discharge pressure of a herringbone gear pump steadier than the discharge pressure of a simple spur gear pump? #11 One of the main differences between the various types of screw pumps is in the __________. #12 An increase in rotor clearances in a rotary pump will __________. #13 To anneal a copper gasket, you should heat the gasket __________. #14 When replacing a gasket in a six-bolt flanged joint, in what order should the bolts be tightened? #15 If you were uncertain as to what type of gasket material to install in a pipeline, you should __________. #16 To properly make and fit a new gasket to a flange, you should __________. #17 Which pipe listed has the largest outside diameter? #18 Piping cross-sections over 12 inches in diameter are sized by the __________. #19 Which of the listed pipe sizes is not commonly used? #20 Copper tubing is manufactured and classified as type K, L, and M. Which type would offer the greatest wall thickness for a given nominal size? #21 Tubing is sized by __________. #22 The use of a needle valve in a piping system is recommended when requiring __________. #23 The seat of a butterfly valve will most likely be constructed of __________. #24 Before making up a flanged joint, you should __________. #25 A thread chaser is a hand tool that should only be used for __________. #26 The tool used for cutting external pipe threads is called a pipe __________. #27 Taps and dies used for threading pipe are __________. #28 When cutting external threads on a steel pipe with a die, you should __________. #29 A thread die will be easier to start if the end of the shaft to be threaded is slightly __________. #30 Before disconnecting a joint in a pipeline, you should __________.

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