OIC-EW MARINA REVIEWER / QUIZ COMPETENCE 4 - PART 3 - Seaman Kowts

COMPETENCE 4 -Operate Main and Auxiliary Machinery and – Associated Control Systems

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#1. The thermostatic expansion valve of a refrigeration system is opened _________.

by refrigerant pressure and close by spring pressure

by spring pressure and close by refrigerant pressure

and close by spring pressure

and close by refrigerant pressure

Incorrect!

#2. A mooring winch should be equipped with mechanical brakes capable of holding______.

50% over the working tension of the mooring line

the full breaking strength of the mooring line

half the breaking strength of the mooring line

the maximum expected tension of the mooring line

Incorrect!

#3. Kinetic energy is associated with ________.

heat

movement and relative velocity

degree of atomic and molecular motion

relative position in respect to datum reference level

Incorrect!

#4. A squeaking sound occurring from within an operating reciprocating air compressor is an indication of ______.

tight compressor bearings

compressor overload

motor overload

badly leaking unloaders

Incorrect!

#5. It is a form of energy which crosses the boundary of a system during a change of state produced by a difference of temperature between the system and its surroundings.

Potential energy

first law of thermodynamics

Heat

Kinetic energy

Incorrect!

#6. Which of the following descriptions best identifies the operating principle of a flash-type evaporator?

Sea water is heated to boiling temperature while under a vacuum.

Sea water is passed over heated plates in a thin film.

Sea water is forced through a heated eductor

Heated sea water is injected into a vacuum chamber

Incorrect!

#7. The expansion tank for the jacket cooling water which is a closed cooling type is used to _______.

maintain constant head in a system

allow easy release of air

prevent water leakage

reduce air contamination

Incorrect!

#8. Main engine lube oil sump tank is located ______.

above the engine

at the same level as the main bearing

at the bottom of the engine

next to the engine

Incorrect!

#9. In a refrigeration system, the amount of superheat absorbed by the refrigerant is adjusted at the _______.

condenser

expansion valve

evaporator

compressor

Incorrect!

#10. Refrigerant is circulated through a refrigeration system by the __________.

condenser

compressor

expansion valve

evaporator

Incorrect!

#11. The Brayton Cycle is one where the combustion event occurs at _________.

constant temperature

increasing pressure

constant pressure

All of the options

Incorrect!

#12. The "general energy equation" expresses energy in which of the following forms?

thermal

potential

kinetic

All of the options

Incorrect!

#13. The purpose of expansion valve is to __________.

provide an orifice between the high pressure and low pressure side of the system

change the gas to a liquid

provide a chamber for the pre- expansion of the liquid

to speed-up the flow of refrigerant

Incorrect!

#14. A dehydrator installed in a refrigeration system is used to remove _______.

oil from the refrigerant

refrigerant from the oil

moisture from the system

non-condensable gases and vapors

Incorrect!

#15. Salinity cell is installed in the distilling unit to indicate the _______.

quantity of freshwater produced

leaking tube

amount of chemical to be added

quality of water produced

Incorrect!

#16. If an air compressor intercooler pressure rises above normal, it usually indicates _______.

dirty lube oil

dirty intercooler

hot environment

leaking valves

Incorrect!

#17. Fluctuations in the pressure and temperature of the steam supplied to the first-effect of a low pressure submerged tube distilling plant will cause ________.

first effect scale formation to be loosened

pressure and temperature fluctuations in the entire unit

increased heat levels throughout the entire unit

decreased priming and lower salinity distillate

Incorrect!

#18. Breaking the fuel into fine spray to provide good combustion is called ______.

refining

purifying

honing

atomizing

Incorrect!

#19. Boiler fire side must be kept free of soot accumulations because ________.

soot interferes with the flow of feedwater

the steam drum internals will become clogged

the fuel oil heaters will become overloaded

soot insulates the boiler heating surfaces

Incorrect!

#20. In a low pressure air compressor, the loss of volumetric efficiency normally results from _______.

heating of the air leaving the cylinders

adiabatic compression in the intercooler

inaccurate valve timing

constant enlargement of the clearance expansion volume

Incorrect!

#21. Boyle's law can best be defined as _______.

the volume of an enclosed gas varies inversely with the applied pressure, provided the temperature remains constant

if the pressure is constant, the volume of an enclosed gas varies indirectly with absolute temperature

a body at rest tends to remain at rest.

None of the stated options

Incorrect!

#22. The liquid indicator sight glass is generally located in the _________.

high pressure vapor line

low pressure vapor line

high pressure liquid line

low pressure liquid line

Incorrect!

#23. A salinity indicating system functions on the basic principle of measuring the __________.

hydrogen ion concentration of water

electrical conductivity of water

electrical inductance of water

specific gravity of water

Incorrect!

#24. Air compressor cylinder unloader enable the compressor to __________.

vary their speed according to temperature and load

change speed according to overload demands

reduce compressed air charge density

start and come up to speed before air compression begins

Incorrect!

#25. The degree of fuel atomization in a diesel engine cylinder depends primarily on _________.

timing of the pump

supply pressure to the pump

shape of the combustion chamber

the size of the holes in the fuel nozzle

Incorrect!

#26. The purpose of the low pressure cutout switch is to _______.

maintain a preset suction pressure to the compressor

maintain liquid refrigerant at the suction of the compressor

start and stop the compressor at preset operating pressures

operate at minimum efficiency

Incorrect!

#27. Fuel oil enters the main engine cylinder through _________.

plunger and barrel

starting valve

fuel oil injector

oil spill valve

Incorrect!

#28. Salinity cell is installed in the distilling unit to indicate the ________.

quantity of freshwater produced

leaking tube

amount of chemical to be added

quality of water produced

Incorrect!

#29. Burned gas from each cylinder is directed to the exhaust manifold which is part of _________.

2-stroke engine

both 4-stroke engine and 2 stroke engine

4-stroke engine

internal combustion engine

Incorrect!

#30. The inlet pipe connection of dirty oil in disc type centrifugal purifier is located at the________.

top of the bowl cover

bottom of the bowl cover

top and bottom of bowl cover

side of the bowl cover

Incorrect!

Finish

There are 30 questions for the actual examination for Competence 4 for OIC-EW with a passing rate of 70%. This means that you are only allowed to make 9 mistakes.

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Results

#1. The thermostatic expansion valve of a refrigeration system is opened _________.

#2. A mooring winch should be equipped with mechanical brakes capable of holding______.

#3. Kinetic energy is associated with ________.

#4. A squeaking sound occurring from within an operating reciprocating air compressor is an indication of ______.

#5. It is a form of energy which crosses the boundary of a system during a change of state produced by a difference of temperature between the system and its surroundings.

#6. Which of the following descriptions best identifies the operating principle of a flash-type evaporator?

#7. The expansion tank for the jacket cooling water which is a closed cooling type is used to _______.

#8. Main engine lube oil sump tank is located ______.

#9. In a refrigeration system, the amount of superheat absorbed by the refrigerant is adjusted at the _______.

#10. Refrigerant is circulated through a refrigeration system by the __________.

#11. The Brayton Cycle is one where the combustion event occurs at _________.

#12. The "general energy equation" expresses energy in which of the following forms?

#13. The purpose of expansion valve is to __________.

#14. A dehydrator installed in a refrigeration system is used to remove _______.

#15. Salinity cell is installed in the distilling unit to indicate the _______.

#16. If an air compressor intercooler pressure rises above normal, it usually indicates _______.

#17. Fluctuations in the pressure and temperature of the steam supplied to the first-effect of a low pressure submerged tube distilling plant will cause ________.

#18. Breaking the fuel into fine spray to provide good combustion is called ______.

#19. Boiler fire side must be kept free of soot accumulations because ________.

#20. In a low pressure air compressor, the loss of volumetric efficiency normally results from _______.

#21. Boyle's law can best be defined as _______.

#22. The liquid indicator sight glass is generally located in the _________.

#23. A salinity indicating system functions on the basic principle of measuring the __________.

#24. Air compressor cylinder unloader enable the compressor to __________.

#25. The degree of fuel atomization in a diesel engine cylinder depends primarily on _________.

#26. The purpose of the low pressure cutout switch is to _______.

#27. Fuel oil enters the main engine cylinder through _________.

#28. Salinity cell is installed in the distilling unit to indicate the ________.

#29. Burned gas from each cylinder is directed to the exhaust manifold which is part of _________.

#30. The inlet pipe connection of dirty oil in disc type centrifugal purifier is located at the________.

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