Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine General (Supplementary) (Set 26)
30:00
|Question 1 of 30
Question Navigator
Correct Incorrect Pending Starred
Question 1 of 30
Which of the following propulsor types represents the proper terminology for a Voith- Schneider drive?
Browse Questions in Set 26
30 MCQs #1 Which of the following propulsor types represents the proper terminology for a Voith- Schneider drive? #2 If a main propulsion shafting arrangement is such that a strut and strut bearing is required, what is the name of the section of shafting that passes through the hull penetration to the closest water-tight bulkhead? #3 A pumping system utilizing a centrifugal pump is designed for a specific discharge head in feet. What happens to the pump's discharge pressure when the Specific Gravity (SG) of the fluid pumped changes? #4 Both existing centrifugal cooling water pumps will be replaced by two of a higher GPM. Only one pump is used in normal operation and there will be no modifications to their discharge piping. This is an operational concern since increased velocity will increase pipe erosion. What is the fluid velocity in feet/minute in the discharge piping with new pumps, given the following data? #5 The assistant engineer reports an installed centrifugal pump has a history of running higher than normal amperage since new construction. Capacity and discharge head for the pump are more than adequate. All other system parameters are normal. The best way to reduce the pump load is to do which of the following? #6 When repacking a stuffing box fitted with a lantern ring, which of the following precautions should be observed? #7 Why should the use of metallic or semi-metallic packing hooks or pullers be avoided on bronze or brass shafts, rods, plungers, or sleeves? #8 A pump shaft that is bent or distorted should normally be __________. #9 While pumping ballast the Chief Mate reports there is a decrease in vacuum on the pump suction when drawing from a partially full saddle tank. Which of the following could be a possible cause? #10 When reviewing log books, the main salt water cooling pump discharge pressure has decreased in the three years since overhaul. Which of the following would most likely be the cause of the problem. #11 According to the illustration, which of the following conditions would most likely cause Pump "A" to short cycle? GS-0173 #12 The process of grinding, shredding, or reducing the size of sewage particles is known as __________. #13 Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-09
Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration. #14 Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-42
Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration. #15 Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-43
Illustration GS-RA-43: the U.S. Coast Guard has not released this illustration. #16 In the illustrated single zone HVAC system, what prevents the simultaneous flow of steam through the preheat coil and flow of chilled water through the cooling coil? See Illustration GS-RA-09
Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration. #17 In the illustrated single zone HVAC system, what statement represents the relationship between the exhaust, outside air and recirculation dampers? Refer to Illustration GS-RS-09
Illustration GS-RS-09: the U.S. Coast Guard has not released this illustration. #18 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the summer outside air duct thermostat? GS-RA-42
Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration. #19 Referring to the illustrated dual duct multiple zone HVAC system, how is the space temperature directly controlled? GS-RA-43
Illustration GS-RA-43: the U.S. Coast Guard has not released this illustration. #20 Expansion tanks when used in a ship's low temperature hot water heating system may be of the open or closed type. Referring to the illustrated central-station hookup for a hot-water heating system drawing, what would be the normal temperature range of the water? See Illustration GS-0151 oo #21 What advantage does a 4-pipe hydronic heating/cooling heating system have over a 2-pipe hydronic heating/cooling system? #22 What common feature is found on both liquid-desiccant and solid-desiccant cargo- hold dehumidification systems? #23 Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70F and the relative humidity is 40%, what is the absolute humidity? GS-RA-22
Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #24 Referring to the illustrated psychrometric chart, suppose air at a dry-bulb temperature of 60F and a relative humidity of 52% passes over a heating coil, resulting in sensible heat gain, and the off-coil temperature is now 80F. What is off-coil relative humidity? GS-RA-22
Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #25 Referring the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature above the dew point temperature, and this results in sensible heat loss with no change in moisture content. What statement represents the direction of the air conditioning process line? GS-RA-22
Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #26 Referring to the illustrated psychrometric chart, under what conditions are the dry- bulb, wet-bulb, and dew point temperatures for air all equal in value? GS-RA-22
Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #27 Oil sprays on to a hot piece of machinery, catches fire and causes $35,000 damage to your vessel. By law this must be reported to the __________. #28 A water line ruptures under pressure and floods the engine room causing $(USA)30,000 damage to the machinery. By law, this must be reported to the __________. #29 When tuning a Proportional, Integral, Derivative (PID) controller/loop, one should know/understand the influence of each action component on the loop. Which description of a component is correct? #30 While calibrating an electronic 4 - 20 mA or 3 - 15 PSI pneumatic controller, what is the value of 'Live Zero'?
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...