Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Subjects (Auxiliaries & Systems) (Set 31)
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The illustration shown represents a blueprint of a metal __________. Illustration GS-0028
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30 MCQs #1 The illustration shown represents a blueprint of a metal __________. Illustration GS-0028 #2 Which of the conditions listed does the blueprint symbol shown in the illustration represent? Illustration GS-0028 #3 Using the information in the illustration shown, the tail of the welding symbol will __________. Illustration GS-0030 #4 The exploded drawing shown in the illustration is intended to show the __________. Illustration GS-0025 #5 An 8" diameter wheel is driving a 20" diameter wheel via a pair of belts. The power input is supplied by a 5 HP motor rotating the driving wheel at 300 RPM. If the efficiency of the transmission is 80%, what RPM and torque is delivered to the driven wheel? #6 What statement is true concerning the purpose of an independent main thrust bearing where used? #7 What statement is true concerning the arrangement of line shaft bearing housings? #8 What type of bearing is most generally used as an independent main thrust block on merchant ships? #9 What statement is true with respect to the pressure side of a propeller blade? #10 An increase in rotor clearances in a rotary pump will __________. #11 One of the main differences between the various types of screw pumps is in the __________. #12 If the existing vapor pressure is subtracted from the indicated pressure at the pump suction, the remainder is the __________. #13 Which of the following terms is used to identify the pressure of a liquid entering a centrifugal pump? #14 Which of the following statements is true regarding mechanical seals? #15 Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by __________. #16 Reduced capacity, accompanied by vibration and noise at the suction of a centrifugal pump, results from cavitation in the fluid being pumped. Cavitation describes the formation of __________. #17 Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by __________. #18 In examining a baseline vibration signature and the historical record of periodic vibration analyses, what must be considered for the evaluation of rotating machinery? #19 What is the most useful measurement that represents the severity of vibration associated with periodic or oscillatory motion? #20 Probably the most useful troubleshooting tools used in a predictive maintenance management program for shipboard machinery are vibration meters, analyzers, and monitors. What is the term that represents the number of vibration cycles per unit time as a result of a part vibrating during its periodic or oscillatory motion? #21 The reading on the micrometer scale shown in figure "D" in the illustration is __________. Illustration GS-0081 #22 The correct torque value for a micrometer torque wrench is reached when __________. #23 The most accurate method of measuring the setting of an inside caliper is to use a/an __________. #24 What is the reading of the vernier micrometer caliper scale shown in figure "G" in the illustration? Illustration GS-0083 #25 The rotating part of a micrometer is known as the __________. #26 If you are hand tapping holes in cast iron, you should __________. #27 When internal threading for piping where the work permits the tap to be run entirely through you can begin and end the tapping of the hole by using a __________. #28 Which of the devices shown in the illustration should be used with a bridge gage? Illustration GS-0073 #29 The purpose of the instrument illustrated is to __________. Illustration GS-0079 #30 The ruler indicated in the illustration is commonly referred to as a/an _________. Illustration GS-0023
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