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Questions and Answers

A badly leaking refrigeration compressor discharge valves will cause

  • Damage to the condenser
  • Constant running of the compressor (correct)
  • Overfeeding of the expansion valve
  • Flooding of the receiver 
  • A change in the degree of fuel atomization in a diesel engine cylinder has the greatest effect on the

  • Fuel injection rate
  • Cylinder air turbulence
  • Fuel spray angle 
  • Combustion in that cylinder (correct)
  • A constant speed governor is usually installed on a

  • Electric motor
  • Generator engine (correct)
  • Cargo pump
  • Wheelhouse
  • A loud clicking noise occurring from within the valve compartment of an opening diesel engine would indicate

    <p>Excessive valve clearances</p> Signup and view all the answers

    A twin-screw, rotary, positive displacement pump is provided with timing gears. If were possible to change the lead (pitch) of the screws, which of the following statements would represent the true effect on the pump characteristics?

    <p>The shorter the lead, the higher the pressure potential</p> Signup and view all the answers

    According to Regulations, power driven auxiliary steering gear for a vessel capable of a 12 knot service speed, must be able to meet the rudder movement requirements at which of the minimum vessel speeds listed below?

    <p>7 Knots</p> Signup and view all the answers

    Air compressor cylinder unloader enable to compressor to?

    <p>Start and come up to speed before air compression begins</p> Signup and view all the answers

    Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by?

    <p>A liquid seal</p> Signup and view all the answers

    Air leakage into a flash type distilling plant could occur through

    <p>Gasketed joints, valve stem, and gage glass packing</p> Signup and view all the answers

    An excessive pressure differential across a lube oil strainer could indicate the

    <p>Upside down strainer needs cleaning</p> Signup and view all the answers

    Study Notes

    Malfunctioning Compressor Discharge Valves

    • A badly leaking refrigeration compressor discharge valves will cause issues with the system's operation.

    Diesel Engine Performance

    • A change in the degree of fuel atomization in a diesel engine cylinder has the greatest effect on the engine's performance.

    Governor Installation

    • A constant speed governor is usually installed on a diesel engine.

    Valve Compartment Noise

    • A loud clicking noise occurring from within the valve compartment of an opening diesel engine would indicate a problem with the valve operation.

    Twin-Screw Pumps

    • A twin-screw, rotary, positive displacement pump is provided with timing gears.
    • Changing the lead (pitch) of the screws would affect the pump's characteristics.

    Steering Gear Regulations

    • Power-driven auxiliary steering gear for a vessel capable of a 12 knot service speed must be able to meet the rudder movement requirements at a minimum vessel speed of 7 knots.

    Air Compressor Cylinder Unloader

    • Air compressor cylinder unloaders enable the compressor to reduce its capacity.

    Centrifugal Pump Sealing

    • Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by the stuffing box packing.

    Flash Distillation Plant

    • Air leakage into a flash type distilling plant could occur through improper sealing or opened valves.

    Lube Oil Strainer

    • An excessive pressure differential across a lube oil strainer could indicate the strainer is clogged.

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    Description

    Test your knowledge on the effects of badly leaking refrigeration compressor discharge valves. Find out how this issue can impact a system's performance and efficiency.

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