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Louisiana Property and Casualty EXAM QUESTIONS ACCURATE AND VERIFIED ACTUAL EXAM, Exams of Business and Labour Law

Columbia International University (CIU)Business and Labour Law

1. The transfer of money from inside a banking premises to a person other than the messenger outside those premises or to a place outside those premises is covered under which commercial crime coverage? A. Funds Transfer Fraud B. Employee Theft C. Computer Fraud ✅ D. Forgery or Alteration • Rationale: Computer Fraud coverage protects against loss of money, securities, or property transferred via computer from inside the premises to a person or place outside. 2. What is a written agreement which indemnifies a person for fire damage to the premises rented to the insured? A. Commercial Lease Contract B. Fire Department Service Contract C. Property Lease Addendum D. Fire Legal Liability Agreement ✅ • Rationale: This type of agreement covers damage by fire to rented premises when the insured is legally liable.

Typology: Exams

2024/2025

Available from 07/01/2025

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Lubrication Systems EXAM ALL VERSIONS 2025
| LATEST AND ACCURATE REAL EXAM
QUESTIONS WITH DETAILED ANSWERS |
VERIFIED FOR GUARANTEED PASS | LATEST
UPDATE
1. Which bearings have a steel outer shell and inner layers of softer metal?
A. Ball bearings
B. Roller bearings
C. Plain bearings ✅
D. Needle bearings
Rationale: Plain bearings typically consist of a steel shell with a softer metal lining to
reduce friction and wear.
2. What is the primary function of rolling bearings?
A. To retain oil film in all conditions
B. To reduce oil usage
C. To handle side forces that may overcome oil film ✅
D. To increase friction
Rationale: Rolling bearings are used where high side forces might cause metal-to-metal
contact in plain bearings.
3. What is another name for rolling bearings?
A. Sleeve bearings
B. Thrust bearings
C. Ball bearings ✅
D. Journal bearings
Rationale: Ball bearings are a common type of rolling bearings.
4. What is the normal oil pump pressure in an engine?
A. 5–20 PSI
B. 30–80 PSI
C. 10–60 PSI ✅
D. 70–100 PSI
Rationale: Typical engine oil pressure ranges from 10 to 60 PSI to maintain proper
lubrication.
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Download Louisiana Property and Casualty EXAM QUESTIONS ACCURATE AND VERIFIED ACTUAL EXAM and more Exams Business and Labour Law in PDF only on Docsity!

Lubrication Systems EXAM ALL VERSIONS 2025

| LATEST AND ACCURATE REAL EXAM

QUESTIONS WITH DETAILED ANSWERS |

VERIFIED FOR GUARANTEED PASS | LATEST

UPDATE

  1. Which bearings have a steel outer shell and inner layers of softer metal? A. Ball bearings B. Roller bearings C. Plain bearings ✅ D. Needle bearings Rationale: Plain bearings typically consist of a steel shell with a softer metal lining to reduce friction and wear.
  2. What is the primary function of rolling bearings? A. To retain oil film in all conditions B. To reduce oil usage C. To handle side forces that may overcome oil film ✅ D. To increase friction Rationale: Rolling bearings are used where high side forces might cause metal-to-metal contact in plain bearings.
  3. What is another name for rolling bearings? A. Sleeve bearings B. Thrust bearings C. Ball bearings ✅ D. Journal bearings Rationale: Ball bearings are a common type of rolling bearings.
  4. What is the normal oil pump pressure in an engine? A. 5–20 PSI B. 30–80 PSI C. 10–60 PSI ✅ D. 70–100 PSI Rationale: Typical engine oil pressure ranges from 10 to 60 PSI to maintain proper lubrication.
  1. Which engine components are the last to receive oil and the first to suffer from oil loss? A. Crankshaft B. Pistons C. Valve train components ✅ D. Oil filter Rationale: Valve train components are furthest in the oil path, making them most vulnerable to oil starvation.
  2. What are oil passages in an engine block called? A. Tunnels B. Shafts C. Tubes D. Galleries ✅ Rationale: "Galleries" is the term used for internal oil passages in an engine.
  3. What is another name for an oil pan? A. Reservoir B. Cradle C. Sump ✅ D. Pit Rationale: The oil pan, also called a sump, collects and stores engine oil.
  4. What are the two primary ways moving engine parts receive lubrication? A. Spray and gravity B. Under pressure and splash ✅ C. Capillary and drip D. Wick and pump Rationale: Lubrication occurs by pressurized delivery and by splash from moving components.
  5. Which system's function includes reducing friction between engine parts? A. Cooling system B. Fuel system C. Ignition system D. Lubrication system ✅ Rationale: The lubrication system is designed to reduce friction and wear.

D. Surface ✅ Rationale: Surface filters use a mesh to catch larger particles on the surface.

  1. Which type of filter can be spiral wound or CUNO type? A. Depth B. Edge ✅ C. Semi-depth D. Pleated Rationale: Edge filters include spiral wound and CUNO designs.
  2. What component is found in dry-sump engines but not in wet-sump engines? A. Oil filter B. Cooling fan C. Scavenge pump ✅ D. Thermostat Rationale: The scavenge pump returns oil from the crankcase to the reservoir in dry- sump systems.
  3. What do most lubrication systems monitor using gauges? A. Level and flow B. Viscosity and cleanliness C. Temperature and pressure ✅ D. Volume and density Rationale: Oil temperature and pressure are critical indicators of system performance.
  4. A fuel-to-oil ratio of at least 30:1 is required when the aircraft lacks: A. Fuel filter B. Oil cooler C. Oil reserve or transfer system ✅ D. Magnetic plug Rationale: This ratio ensures adequate lubrication in systems without separate oil reserves.
  5. Regulations require oil reservoirs to have an expansion space at least 10% greater than tank capacity or 0.5 gallon. A. True ✅ B. False Rationale: This ensures space for oil expansion during heating.
  1. Constant displacement pumps move a fixed volume of fluid regardless of RPM. A. True B. False ✅ Rationale: Flow output can vary due to leaks and bypass flow at higher RPMs.
  2. The most common oil pump in reciprocating engines is the gear oil pump. A. True ✅ B. False Rationale: Gear oil pumps are standard due to their simplicity and reliability.
  3. A gerotor pump consists of a free-spinning spur gear inside a rotor housing. A. True B. False ✅ Rationale: The inner gear is driven and not free-spinning.
  4. What is the purpose of a scavenge pump in a dry-sump oil system? A. Circulate coolant B. Remove dirt C. Return oil to the reservoir ✅ D. Filter contaminants Rationale: The scavenge pump returns oil to the reservoir to prevent pooling.
  5. The purpose of a pressure relief valve is to prevent engine damage from excessive oil pressure. A. True ✅ B. False Rationale: This valve opens to relieve excess pressure.
  6. Most pressure relief valves are spring-loaded in the open position. A. True B. False ✅ Rationale: They are spring-loaded in the closed position and open when pressure exceeds a limit.
  7. The greater the spring pressure in an oil pressure relief valve, the higher the oil pressure. A. True ✅ B. False Rationale: Stronger springs allow more pressure to build before the valve opens.
  1. To increase oil pressure, turn the adjustment screw: A. Counterclockwise B. Clockwise ✅ C. Doesn't affect pressure D. Remove the screw Rationale: Clockwise turning increases spring pressure and raises oil pressure.
  2. Which is NOT a function of lubricating oil? A. Clean B. Seal C. Increase combustion ✅ D. Reduce friction Rationale: Lubricating oil does not contribute to combustion but does clean and protect.
  3. Viscosity is defined as: A. Rate of evaporation B. Oil’s resistance to flow ✅ C. Oil’s color D. Oil’s weight Rationale: Viscosity measures how easily oil flows.
  4. What does the viscosity index represent? A. Oil’s purity B. Rate of color change C. Rate of viscosity change with temperature ✅ D. Oil’s additive strength Rationale: It indicates how stable viscosity is across temperatures.
  5. Specific gravity compares oil’s weight to: A. Air B. Gasoline C. Distilled water ✅ D. Lead Rationale: Specific gravity is a ratio compared to water.
  6. The cloud point is the temperature at which: A. Oil begins to vaporize B. Wax crystals form ✅

C. Oil freezes D. Oil burns Rationale: At the cloud point, wax and solids crystallize.

  1. The pour point of oil is: A. When oil catches fire B. When oil vaporizes C. The lowest temperature at which oil flows ✅ D. When oil is filtered Rationale: It marks the lowest temperature for oil mobility.
  2. The flash point is the temperature at which: A. Oil explodes B. Oil evaporates completely C. Oil emits ignitable vapors ✅ D. Oil freezes Rationale: At this point, oil gives off vapors that can ignite.
  3. The fire point is defined as: A. Flashpoint plus 20°C B. Temperature for sustained flame ✅ C. Oil boiling point D. Melting point Rationale: This is when vapors ignite and sustain burning.
  4. Straight mineral oil is usually used for: A. High-performance racing B. New or overhauled engines during break-in ✅ C. Diesel engines D. Long-term storage Rationale: It avoids additives that might interfere with break-in.
  5. Which oil is most commonly used in reciprocating engines? A. Multi-viscosity B. Ashless-dispersant oil ✅ C. Mineral oil D. Castor oil Rationale: AD oils prevent sludge and varnish build-up.

D. Air filters Rationale: Pressurized oil targets critical load-bearing parts. Why should an engine never be overfilled with oil?

  • Ans - The oil can foam and interfere with lubrication. Name the two types of oil pumps commonly used.
  • Ans - the gear type and the rotor type pump What does the oil pump do?
  • Ans - pumps oil under pressure to all the internal moving parts of an engine How do engine bearings work?
  • Ans - minimize friction and support the engine's parts by reducing wear where one metal part rotates within another The components that are lubricated by splashed oil include: - ANSWER Cylinder walls, camshaft lobes, upper connecting, rod bearings, piston pins, accessory gears Most surfaces inside of aircraft engines are perfectly smooth to help reduce friction and wear. T or F - ANSWER False What uses outside air to help cool engine oil? - ANSWER Oil cooler The oil film on the inside of a cylinder helps form a seal with the piston rings to prevent gas leakage during combustion T or F - ANSWER true Engine oil acts as a cleaning agent. T or F - ANSWER True

The oil film that coats engine parts acts as a barrier to prevent oxygen and moisture from causing corrosion. T or F - ANSWER True All oils use the SAE rating system. T or F - ANSWER False In regards to engine oil grading, what does a "W" indicate? - ANSWER Cold weather use An SAE rating on an oil container signifies that the Society of Automotive Engineers have endorsed that oil. T or F - ANSWER False The primary purpose of a lubrication system is to deliver oil to the internal engine components. T or F - ANSWER True All reciprocating engines use a combination of pressure, splash, and spray lubrication. T or F - ANSWER False In a pressure lubrication system, what is used to supply pressurized oil to critical engine parts? - ANSWER Positive displacement pump Splash lubrication is effective in engines where the oil is stored? - ANSWER In the crankcase Engine components that are lubricated by sprayed engine oil include cylinder walls and camshaft lobes. T or F - ANSWER True What are the two classifications of reciprocating engine lubrication systems? - ANSWER Wet and Dry sump In which oil system is oil stored in the crankcase? - ANSWER Wet-sump system

  1. If all other requirements can be met, what type of oil should be used to achieve theoretically perfect engine lubrication? - ANSWER *a. The thinnest oil that will stay in place and maintain a reasonable film strength.
  2. In addition to lubricating (reducing friction between moving parts), engine oil performs what functions? 1. Cools. 2. Seals. 3. Cleans. 4. Prevents corrosion. 5. Cushions impact (shock) loads. - ANSWER *b. 1, 2, 3, 4, 5.
  3. Which of these characteristics is desirable in turbine engine oil? - ANSWER *b. High flash point.
  4. The viscosity of a liquid is a measure of its - ANSWER *a. resistance to flow.
  5. What type of oil system is usually found on turbine engines? - ANSWER *a. Dry sump, pressure, and spray.
  6. Which of the following factors helps determine the proper grade of oil to use in a particular engine? - ANSWER *c. Operating speeds of bearings.
  7. Specific gravity is a comparison of the weight of a substance to the weight of an equal volume of - ANSWER *b. distilled water at a specific temperature.
  8. Which of the following has the greatest effect on the viscosity of lubricating oil? - ANSWER *a. Temperature.
  9. What advantage do mineral base lubricants have over vegetable oil base lubricants when used in aircraft engines? - ANSWER *b. Chemical stability.
  10. The recommended aircraft engine lubricants are - ANSWER *b. mineral or synthetic based.
  1. High tooth pressures and high rubbing velocities, such as occur with spur-type gears, require the use of - ANSWER *a. an EP lubricant.
  2. Manufacturers normally require turbine engine oil servicing within a short time after engine shutdown primarily to - ANSWER *a. prevent overservicing.
  3. What type of oil do most engine manufacturers recommend for new reciprocating engine break-in? - ANSWER *b. Straight mineral oil.
  4. What type of oil do most engine manufacturers recommend after new reciprocating engine break-in? - ANSWER *b. Ashless-dispersant oil.
  5. The type of oil pumps most commonly used on turbine engines are classified as - ANSWER *a. positive displacement.
  6. As a general rule, the mixture setting on a reciprocating engine operating at or near takeoff power that provides the best cooling is - ANSWER *a. FULL RICH.
  7. The engine oil temperature regulator is usually located between which of the following on a dry sump reciprocating engine? - ANSWER *b. The scavenger pump outlet and the oil storage tank.
  8. What will happen to the return oil if the oil line between the scavenger pump and the oil cooler separates? - ANSWER *b. The return oil will be pumped overboard.
  9. At cruise RPM, some oil will flow through the relief valve of a gear-type engine oil pump. This is normal as the relief valve is set at a pressure which is - ANSWER *b. lower than the pressure pump capabilities.
  1. Oil tank fillers on reciprocating engines are marked with the word - ANSWER *c. "oil," in accordance with 14 CFR part 23.
  2. After making a welded repair to a pressurized-type turbine engine oil tank, the tank should be pressure checked to - ANSWER *a. not less than 5 PSI plus the maximum operating pressure of the tank.
  3. Why are fixed orifice nozzles used in the lubrication system of gas turbine engines? - ANSWER *a. To provide a relatively constant oil flow to the main bearings at all engine speeds.
  4. Possible failure related ferrous-metal particles in turbine engine oil cause an (electrical) indicating-type magnetic chip detector to indicate their presence by - ANSWER *b. bridging the gap between the detector center (positive) electrode and the ground electrode.
  5. What would be the probable result if the oil system pressure relief valve should stick in the open position on a turbine engine? - ANSWER *c. Insufficient lubrication.
  6. What is the primary purpose of the oil-to-fuel heat exchanger? - ANSWER *b. Cool the oil.
  7. What unit in an aircraft engine lubrication system is adjusted to maintain the desired system pressure? - ANSWER *a. Oil pressure relief valve.
  8. Low oil pressure can be detrimental to the internal engine components. However, high oil pressure - ANSWER *a. should be limited to the engine manufacturer's recommendations.
  9. What is the primary purpose of the oil breather pressurization system that is used on turbine engines? - ANSWER *c. Provides a proper oil spray pattern from the main bearing oil jets.
  1. The purpose of directing bleed air to the outer turbine case on some engines is to - ANSWER *a. provide optimum turbine blade tip clearance by controlling thermal expansion.
  2. Some larger reciprocating engines use a compensating oil pressure relief valve to - ANSWER *a. provide a high engine oil pressure when the oil is cold and automatically lower the oil pressure when the oil warms up.
  3. In order to relieve excessive pump pressure in an engine's internal oil system, most engines are equipped with a - ANSWER *c. relief valve.
  4. What is the source of most of the heat that is absorbed by the lubricating oil in a reciprocating engine? - ANSWER *c. Pistons and cylinder walls.
  5. How are the teeth of the gears in the accessory section of an engine normally lubricated? - ANSWER *a. By splashed or sprayed oil.
  6. What is the purpose of the check valve generally used in a dry sump lubrication system? - ANSWER *b. To prevent the oil from the supply tank from seeping into the crankcase during inoperative periods.
  7. From the following, identify the factor that has the least effect on the oil consumption of a specific engine. - ANSWER *a. Mechanical efficiency.
  8. How is the oil collected by the piston oil ring returned to the crankcase? - ANSWER *b. Through holes drilled in the piston oil ring groove.
  9. Which of the following lubrication system components is never located between the pressure pump and the engine pressure system? - ANSWER *b. Fuel line for oil dilution system.
  10. As an aid to cold-weather starting, the oil dilution system thins the oil with - ANSWER *c.
  1. Where are sludge chambers, when used in aircraft engine lubrication systems, usually located? - ANSWER *a. In the crankshaft throws.
  2. Why is an aircraft reciprocating engine oil tank on a dry sump lubrication system equipped with a vent line? - ANSWER *c. To prevent pressure buildup in the oil tank.
  3. Excessive oil is prevented from accumulating on the cylinder walls of a reciprocating engine by - ANSWER *c. oil control rings on the pistons.
  4. (1) Wet sump oil systems are most commonly used in gas turbine engines. (2) In most turbine engine oil tanks, a slight pressurization of the tank is desired to ensure a positive flow of oil. Regarding the above statements, - ANSWER *b. only No. 2 is true.
  5. The pumping capacity of the scavenger pump in a dry sump aircraft engine's lubrication system - ANSWER *a. is greater than the capacity of the oil supply pump.
  6. In which of the following situations will the oil cooler automatic bypass valve be open the greatest amount? - ANSWER *b. Engine oil below normal operating temperature.
  7. In order to maintain a constant oil pressure as the clearances between the moving parts of an engine increase through normal wear, the supply pump output - ANSWER *b. remains relatively constant (at a given RPM) with less oil being returned to the pump inlet by the relief valve.
  8. The valve assemblies of opposed reciprocating engines are lubricated by means of a - ANSWER *c. pressure system.
  9. What will result if an oil filter becomes completely blocked? - ANSWER *c. Oil will flow at the normal rate through the system.
  1. A turbine engine dry sump lubrication system of the self-contained, high-pressure design - ANSWER *b. consists of pressure, breather, and scavenge subsystems.
  2. Lube system last chance filters in turbine engines are usually cleaned - ANSWER *c. during overhaul.
  3. How are the piston pins of most aircraft engines lubricated? - ANSWER *b. By oil which is sprayed or thrown by the master or connecting rods.
  4. The vent line connecting the oil supply tank and the engine in some dry sump engine installations permits - ANSWER *c. the oil tank to be vented through the normal engine vent.
  5. An engine lubrication system pressure relief valve is usually located between the - ANSWER *c. pump and the internal oil system.
  6. Where is the oil of a dry sump reciprocating engine exposed to the temperature control valve sensing unit? - ANSWER *a. Oil cooler inlet.
  7. Under which of the following conditions is the oil cooler flow control valve open on a reciprocating engine? - ANSWER *b. When the temperature of the oil returning from the engine is too low.
  8. The purpose of a relief valve installed in the tank venting system of a turbine engine oil tank is to - ANSWER *a. prevent oil pump cavitation by maintaining a constant pressure on the oil pump inlet.
  9. In a reciprocating engine, oil is directed from the pressure relief valve to the inlet side of the
    • ANSWER *c. pressure pump.