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(1.2.8.1-1) Pressure in an operating hydraulic system is developed __________. - ANSWERSby resistance to the fluid flow through the system (2.2.9.1-4) Energy losses occurring in a hydraulic system are ultimately absorbed by the - ANSWERSatmosphere as heat A hydraulic fluid that exhibits little change in viscosity when heated is said to have a high - ANSWERSviscosity index A hydraulic must be able to do all of the following except - ANSWERScompress easily An improperly maintained filter used in a hydraulic system can - ANSWERSreduce or stop the output action of the actuator An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of _______________. - ANSWERSpump cavitation Energy in motion is known as ______ energy - ANSWERSkinetic Force over unit area is - ANSWERSpressure In the illustrated system, what pressure will be indicated on the gage if the load (x) is 8000 lbs (3632 kg) and the piston area (y) is 8 sq. in (51.6 sq. cm)?(See Illustration GS-0062) - ANSWERS1,000 psi (70.3 2) In the illustrated system, what pressure will be indicated on the gage if the load (x) is 10,000 lbs (4540 kg) and the piston area (y) is 8 sq. in (51.6 sq. cm)?(See illustration GS-0062). - ANSWERS1,250 psi (87.88 kg/cm2) in the illustration which letter is the symbol for a filter?(GS-0068) - ANSWERSD in the illustration which letter is the symbol for a cooler? Gs-0068 - ANSWERSE In the system illustrated, which of the following readings should be indicated on the pressure gage, if the load (x) is 8000 lbs (3632 kg) and the piston area (y) is 10 sq. in (64.5 sq. cm) - ANSWERS800 psi (56.31 kg/cm2) Pascals law states that pressure exerted on a confined liquid - ANSWERSis distributed equally thoughout the liquid Some fluid filters used in hydraulic systems are designed to cope with increasing pressure differentials by ___________. - ANSWERSautomatically bypassing the fluid via an internal valve arrangement Strainers are commonly used in hydraulic systems to ___________ - ANSWERSprevent solid particles from entering the pump The component which is used to thoroughly separate small, fine, dust-like particulate contamination from hydraulic fluid is a/an - ANSWERSfilter The pressure of an operating hydraulic system, as indicated by a pressure gauge, is a result of the fluid flow overcoming ________________ - ANSWERSall of the above What Characteristics of a fluid does the term specific gravity describe - ANSWERSDensity Pressure in an operating hydraulic system is developed - ANSWERSby resistance to the fluid flow through the system Energy losses occurring in a hydraulic system are ultimately absorbed by the __________. - ANSWERSatmosphere as heat A casing drain is provided for axial piston and bent axis variable stroke pumps to - ANSWERSprevent damage due to agitation and overheating of oil accumulated in the casing as a result of minor internal leakage An axial piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned - ANSWERSparallel to each other and to the shaft Figure "D" in the illustration is an improperly installed hose with a restriction developed at the ________. (See illustration GS-0063) - ANSWERSsharp bend formed at the left If the flow rate to a linear actuator is reduced by half of the original amount, the __________. - ANSWERSspeed of the actuator will be reduced If the operator releases the handle of the illustrated device while the system output is in motion, the valve will __________.(GS-0032) - ANSWERSreturn to its centered position and the output speed will drop to zero Regarding the device shown in the illustration, if the operator releases the handle while the system output is in motion, the __________. (GS-0035) - ANSWERSvalve will remain in position with the output remaining unchanged The device illustrated is considered to be a pump. Which of the following statements is true if it is to be used as a hydraulic motor?(GS-0074) - ANSWERSSprings would have to be added to the back of the vanes The device shown in the illustration is known as a/an __________.(GS-0032) - ANSWERSspring centered directional control valve The discharge capacity of the axial piston hydraulic pump, shown in the illustration, is __________.(GS-0058) - ANSWERSfixed by the pump housing angle The portion of a hydraulic hose that determines its overall strength, is the - ANSWERSbraided inner layer(s The purpose of the crescent found in the illustrated internal gear pump is to ______. (See Illustration GS-0127) - ANSWERScause liquid to be trapped in between the gear spaces as the gear passes the crescent What type of pump is shown?(GS-0074) - ANSWERSvane pump What type of pump is shown.(GS-0102) - ANSWERSAxial piston pump When the tilting box of a variable stroke axial-piston pump is perpendicular to the pump shaft, which of the following conditions will exist? - ANSWERSThere is no fluid flow. Which of the statements is true concerning the illustrated hydraulic circuit when the directional control valve is centered? Illustration GS-0105 - ANSWERSThe load on the actuator may cause a difference in pressure to exist between the rod and cap end, and oil discharging to the sump across the relief valve with the pump operating Why is the discharge pressure of a herringbone gear pump steadier than the discharge pressure of a simple spur gear pump? - ANSWERSOne discharge phase begins before the previous discharge phase has been completed The figures shown in the illustration shows two different positions of the same steering gear hydraulic pump. Which of the following statements is correct? - ANSWERSChanging from position I to position II will always reverse the direction of fluid flow. Valve "D" indicated in the illustration is referred to as a/an __________. - ANSWERSunloading valve If the device shown in the illustration is used to control the output of a variable displacement pump, and part "A" is displaced 50% from "zero" stroke, which of the following statements will be correct? (See Illustration GS-0039) - ANSWERSThe pump would develop a 50% discharge rate and remain at that condition until the control handle position is changed. Which of the following statements will be true if the position of the manual control lever, shown in the illustration, remains unchanged after the pump is placed on stroke. - ANSWERSAlthough oil will leak past part "B," the amount of pump stroke will be maintained until the control handle position is changed. A hydraulic system flow-control circuit is shown in the illustration and is known as a __________. (GS-0105) - ANSWERSMetered-in Which of the listed components of a hydraulic system would enable the pump to be temporarily shutdown, and yet still provide an instantaneous source of hydraulic force? - ANSWERSAccumulator If the device shown in the illustration is being used to control the output of an axial piston pump, when part "A" is moved to the right, then part ______________. (See Illustration GS-0039) - ANSWERS"B" will move to the left, and "C" will move to the right, but will lag behind the movement of "A" The rubber bladder or separator bag installed in a hydraulic accumulator should only be filled with __________. - ANSWERSdry nitrogen If the flow rate to a linear actuator is reduced by half of the original amount, the __________. - ANSWERSspeed of the actuator will be reduced Which of the listed pressure-control valves would be used in a hydraulic system to temporarily divert some, or all of the pump discharge until the additional flow was required? - ANSWERSunloading valve If the flow rate and pressure from a variable capacity pump was increased while supplying the device illustrated, the __________.(GS-0058) - ANSWERShorsepower, torque, and speed would increase proportionally The purpose of a restrictor valve, as it is used in a hydraulic hatch cover system is to __________. - ANSWERScontrol the speed of the hatch cover movement while closing A hydraulic accumulator, used in a hydraulic system aboard a MODU, is designed to - ANSWERSstore fluid under pressure The discharge capacity of the axial piston hydraulic pump, shown in the illustration, is __________.(GS-0058) - ANSWERSfixed by the pump housing angle A hydraulic system flow-control circuit is shown in the illustration and is known as a __________. (GS-0106) - ANSWERSMetered-out An axial piston hydraulic motor is caused to rotate by fluid flow from a comparably designed variable displacement pump fitted with the illustrated device. If the motor stalls, due to excess load, the pump tilting box will seek neutral stroke until the high side pressure equalizes or is less than the set point pressure established by part __________. (See Illustration GS-0040) - ANSWERSI A variable displacement pump is fitted with the illustrated device, the discharge flow rate will be reduced as described by which of the following statements? (See Illustration GS-0040) - ANSWERSPart "H" will move to block the replenishing pump oil flow across part "G" as flow across hydraulic motor decr