Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Deck General (Set 108)
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Question 1 of 30
The COASTAL DRILLER is experiencing a single amplitude roll angle of 2 degrees and a roll period of 10 seconds. What is the maximum recommended water depth for elevating?
Browse Questions in Set 108
30 MCQs #1 The COASTAL DRILLER is experiencing a single amplitude roll angle of 2 degrees and a roll period of 10 seconds. What is the maximum recommended water depth for elevating? #2 A permanent chain chasing system is used to __________. #3 A mobile offshore drilling unit under tow is approaching a fog bank. When should fog signals be started? #4 What is the "holding power ratio" of an anchor? #5 During a move to a new location, a jack-up drilling unit with personnel on board is towed through a heavy rainstorm. What signal must be sounded by the drilling rig when visibility is restricted? #6 What signal must be sounded by a vessel towing a mobile offshore drilling unit through an area of restricted visibility? #7 When dragging of an anchor occurs, you must back it up with a piggyback (backing) anchor or __________. #8 Given the same water depth and line tension, the catenary length of a 19 pound/foot wire rope mooring line in comparison to the catenary length of a 90 pound/foot mooring chain will be __________. #9 The length of chain between the anchor and the end of the pendant line is called the __________. #10 The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Weather conditions make it necessary to ballast down to survival draft. It is decided to check the stability at the intermediate draft of 32 feet. If the added ballast has an average VCG of 9.03 feet, and the sum of free surface moments is 56,244 foot-tons, what is the new KGL? #11 If the water depth is 500 feet, the length of the pendant wire from the anchor to the buoy is typically __________. #12 Given the same water depth and mooring tension, the length of the ground cable of a 19 pound/foot wire rope mooring line in comparison to a 90 pound/foot mooring chain will be __________. #13 In a storm, the leeward lines of a MODU's mooring system will __________. #14 The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Excessive motion makes it necessary to ballast down to survival draft. It is decided to check the stability at the intermediate draft of 32 feet. If the added ballast has an average VCG of 9.03 feet, and the sum of free surface moments is 56,244 foot-tons, what is the new margin on the maximum allowable KG? #15 Why should you soak an anchor? #16 What effect is achieved from soaking an anchor? #17 To develop maximum anchor holding power, the optimum angle between the anchor's shank and the mooring lines is __________. #18 In observing rig motion while under tow, the period of roll is the time difference between __________. #19 After deploying the anchor, a permanent chain chaser is __________. #20 What is the purpose of a chain stopper? #21 Cable tension for catenary calculations is taken at the __________. #22 The tension on an anchor cable increases so that the angle of the catenary to the seabed at the anchor reaches 10 degrees. How will this affect the anchor in sandy soil? #23 When dragging of an anchor occurs, you must either reposition it at greater range or __________. #24 The indication of a slipping anchor is a(n) __________. #25 The two main types of load cells used in mooring tension gauges are __________. #26 Scouring usually occurs with soils such as __________. #27 The DEEP DRILLER is moored in 700 feet of water. The average tension on the mooring lines is 200 kips. What is the total vertical component of chain tension? #28 The DEEP DRILLER is moored in 600 feet of water. The average line tension is 190 kips. What is the total vertical component of chain tension? #29 The DEEP DRILLER is moored in 700 feet of water. The tension on anchor line #3 is 200 kips. What is the vertical component of chain tension for that line? #30 While anchored in 700 feet of water, 3,150 feet of chain is deployed for line #4. Tension on that line is 200 kips. According to the DEEP DRILLER Operating Manual, how much of that chain lies along the bottom?
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