İKİNCİ MAKİNİST - BAŞ MAKİNİST DENİZCİLİK İNGİLİZCESİ

İKİNCİ MAKİNİST - BAŞ MAKİNİST

DENİZCİLİK İNGİLİZCESİ

1.  ------------- is the first signal of lube- oil trouble.

A)    Lube oil gravity tank low level alarm goes off

B)    Low lube oil sump level

C)    Low outlet temperature from lube oil coolers

D)    No flow through bull’s eye from gravity tank observed

E)    A and B

2. The usual cause of crankcase explosions in diesel engines is not  -----------------------

A)    Heating lubricating oil

B)    Overheating lubricating oil

C)    Poor condition of the cylinder

D)    Crank shaft bearing failures maintenance

E)    Any above

3.  -------------- is not one of the advantages of the open cooling system.

A)    Being the simplest system

B)    No requirement of heat exchange

C)    Obligation of keeping engine cool

D)    The requirement of only one water circulating pump

E)    The requirement of 2 water circulating pumps

4.  The low pressure side of a refrigeration system is from the:

A)    Expansion valve to compressor

B)    Compressor to expansion valve

C)    Expansion valve to the evaporator

D)    Condenser to the expansion valve

E)    None of the above

5.  What is the advantage of using a hydraulic starting system for an emergency diesel?

A)    The system is inexpensive

B)    High pressure lines are not required

C)    It is compact

D)    Faster cranking speeds are obtained

E)    None of the above

6.  Pre combustion chambers in a diesel engine:

A)    Require that each cylinder use two spray nozzles

B)    Require the use of flat crowned pistons to obtain turbulence

C)    Permit the use of a wide range of fuel in that engine

D)    Contain all of the air charge at the end of the compression stroke

E)    Require that each cylinder use more than four spray nozzles

7. The turbocharger of an auxiliary diesel engine is most effected by:

A)    Air inlet manifold pressure

B)    Engine speed

C)    Exhaust temperature

D)    Engine load

E)    None of the above

8.  Another name for the liquid valve is:

A)    Master valve

B)    King valve

C)    Freon valve

D)    Shut off valve

E)    None of above

9.  Refrigerant leakage from the compressor crankcase is prevented by ----------------

A)    Using skirt type pistons

B)    Using shaftseals

C)    Using lantern rings

D)    Maintaining a vacuum in the crankcase

E)    Any above

10.  The coils in the evaporator are attached to the header by:

A)    Pipe nipples

B)    Union type fittings

C)    Welding

D)    Bolted flanges

E)    Both C and D

11.  The system used for breaking scale from the evaporator coil while the evaporator is in operation is called:

A)    Recirculating

B)    Blowing down

C)    Cracking off

D)    Dumping

E)    None of above

12.  Cylinder liner are generally used on diesel engines because:

A)    Liners may be easily replaced after the cylinder walls show wear

B)    Liners provide a more efficient cooling system

C)    Rubbing speeds are reduced through the use of liners

D)    Liners provide a better lubricating surface

E)    None of the above

13.  An over speeding diesel engine could best be stopped by:

A)    Disconnecting the battery cables from the stating motor

B)    Blocking the air intake and securing the fuel supply

C)    A raining the hydraulic fluid from the governor sump

D)    Blocking the flow of cooling air to the radiator

E)    Both C and D

14.  The valve which is always partially open when the evaporator is in operation is the:

A)    Vapor valve

B)    Continuous blowdown valve

C)    Bottom blowdown valve

D)    Surface blowdown valve

E)    Bottom blowup valve

15.  As freon leaves the expansion valve:

A)    Pressure decreases – volume increases

B)    Volume decreases – pressure increases

C)    Volume increases – pressure increases

D)    Pressure increases – volume decreases

E)    None of the above

16.  The oil level in the compressor should be checked:

A)    While the compressor is in operation

B)    Just before starting the compressor

C)    After a long period of operation

D)    For both B and C

E)    None of the above

17.  In a diesel engine closed cooling system, the flow of fresh water through the fresh water and lube oil coolers is controlled by the:

A)    Speed of the engine

B)    Speed of the pump impeller

C)    Automatic temperature regulator

D)    Suction pressure regulator

E)    Governor

18.  A “pneumercator” measures:

A)    Oil pressure

B)    Air level

C)    Liquid level

D)    Air pressure

E)    Air temperature

19.  What type of gauge reads pressure and vacuum?

A)    Duplex

B)    Simplex

C)    Both B and C

D)    Compound

E)    Bourdon tube

20.  Minor freon leaks can be detected by the use of a device called:

A)    A freon visible leak detector

B)    A freon audible leak detector

C)    The blue oven flame detector

D)    Halide torch

E)    None of the above