Synergy Exam Practice Test

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Practice Test Series For Synergy

In Synergy a lot of Technical questions are asked from the syllabus of Marine engineering. Considering and analyzing the previous year questions, the Test Series tries to make you understand what type of questions are asked and how you need to prepare. Even if you have prepared yourself, Do give the test to test your Preparation. All The Best For the Synergy Exam!!

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Practice Set 1

555

Synergy Exam Practice Set

This test is designed to practice for the Synergy Exam. The questions are based on the previous year asked questions. Test your preparation here.

1 / 25

In a modern internal combustion diesel engine, the load carrying part of the engine is referred to as the                  .

2 / 25

In an operating diesel engine, the sealing of the cylinder is the result of the compression rings being forced against the cylinder walls by

3 / 25

Opposed piston diesel engines are classified as                      .

4 / 25

The flywheel reduces speed fluctuations by                          .

5 / 25

Which of the following statements is correct concerning available astern power for diesel main propulsion systems?

6 / 25

Which of the following statements describes the operating characteristics of a precombustion chamber?

7 / 25

Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?

8 / 25

If a diesel engine's exhaust temperature is abnormally high, the cause could be                       .

9 / 25

Which of the conditions listed may occur in an operating diesel

engine if air pockets form within the cylinder head circulating water passages?

10 / 25

Persistent knocking of one cylinder of a diesel engine ceases when

the fuel supply to that cylinder is secured. This problem may be a result of                          .

11 / 25

The direct cause of a crankcase explosion can be attributed to

12 / 25

A cracked cylinder head on a diesel engine may be indicated by

13 / 25

A crack in a cylinder liner can be caused by                           .

14 / 25

Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will                         .

15 / 25

High exhaust back pressure will result in an increase in

16 / 25

Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?

17 / 25

Insufficient piston cooling for a large, low-speed, main propulsion diesel engine burning heavy fuels, can result in                           .

18 / 25

All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are low. Which of the following situations is responsible for this condition?

19 / 25

Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?

20 / 25

In a diesel engine lube oil system, which of the following parts should be lubricated first?

21 / 25

Diesel engine exhaust gas temperatures can be used to determine individual cylinder                         .

22 / 25

Immediately after any diesel engine is started, the engineer should check the                      .

23 / 25

A large low speed main propulsion diesel engine may become overloaded by                            .

I. a heavily fouled hull

II. strong head winds and heavy seas

24 / 25

Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can

25 / 25

Precision engine bearing inserts are manufactured with a small portion of the bearing ends extending beyond the bearing housing or caps. The installation process of these bearings requires sufficient                             .

Your score is

The average score is 55%

0%

Practice Set 2

304

Synergy Exam Practice Set 2

Practice Set 2

1 / 25

Fuel supplied by each unit injector on a two-stroke/cycle single acting diesel engine is directed into each cylinder at a very high pressure through the                       .

2 / 25

In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in                               .

3 / 25

The driving force of a propeller is transmitted to the hull through the                       .

4 / 25

The rate of pressure rise during the period following fuel ignition process in a diesel engine, is influenced chiefly by the

5 / 25

A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an                             .

6 / 25

When is fuel injected into a cylinder of diesel engines?

7 / 25

Injection lag can be caused by                        .

8 / 25

Diesel engine fuel oil leakage should be drained and additional precautions provided to                    .

9 / 25

Differential needle valves used in fuel injectors are directly closed by                            .

10 / 25

What is the term given to the process of breaking up fuel oil into very fine particles for better combustion?

11 / 25

In a diesel engine mechanical-type fuel pump, the delivery check valve is opened by                       .

12 / 25

Proper atomization of fuel in diesel engine combustion chambers will                        .

13 / 25

Fuel oil penetration into the cylinder of a diesel engine is

14 / 25

Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?

15 / 25

Successful combustion inside the cylinders of a diesel engine is dependent upon                         .

16 / 25

Which of the following manufacturing methods is recommended for diesel engine fuel injection line piping?

17 / 25

Cast iron pistons used in large propulsion diesel engines are constructed with                      .

18 / 25

In diesel engines designed with a crosshead, the motion of the piston rod can be described as                          .

19 / 25

Which of the components listed is NOT found in a single acting engine?

20 / 25

In a diesel engine, pistons are attached to the crankshaft by

21 / 25

Which of the following will occur when the lower edge of the spiral, on the plunger of a jerk pump, uncovers the spill port?

22 / 25

The amount of fuel delivered by a helical plunger fuel injection pump is controlled by                            .

23 / 25

When the lower edge of the spiral begins to uncover the release port in a jerk pump, the                         .

24 / 25

The plunger in a jerk pump is rotated until the release port is uncovered. If the port remains uncovered all of the time, which of the listed operations will occur?

25 / 25

The duration of fuel injection developed by an individual port-and- helix fuel injection pump, is determined by the                         .

Your score is

The average score is 64%

0%

Practice Set 3

221

Synergy Exam Practice Set 3

 Practice Set 3

1 / 25

The valve cam slope angle determines the                           .

2 / 25

Engine displacement is equal to the cylinder                           .

3 / 25

A loop or cross scavenged engine utilizes the motion of its pistons and a turbocharger to provide scavenging air. Which of the listed mechanical designs prevents the air under the pistons from being pumped back through the scavenge ports during the piston

4 / 25

Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce                         .

5 / 25

The possibility of damage from operating a diesel engine at critical speeds is reduced by the use of                           .

6 / 25

Increasing the load on an engine using a double-helix type injection pump varies the effective stroke of the pump to start

7 / 25

The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears, propeller shafts, and generators by the                        .

8 / 25

One of the factors limiting the amount of load which can beput on a modern marine diesel engine is the                         .

9 / 25

White smoke exhausting from a diesel engine can be caused by a

10 / 25

If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?

11 / 25

One cause of diesel engine surging can be a result of

12 / 25

Which of the listed pre-start procedures should be carried out prior to starting a crosshead type diesel engine after an overhaul?

13 / 25

Plugged spray holes in a diesel engine fuel injector will cause excessive smoking at idling speed, in addition to                            .

14 / 25

Late fuel injection in a diesel engine is indicated by low firing pressure with                        .

15 / 25

Distortion of the spray pattern of a nozzle or injector may be indicated by a/an                         .

16 / 25

An incorrect spray pattern produced by a diesel engine fuel injection nozzle can be directly caused by                          .

17 / 25

High cylinder firing pressure, accompanied by low exhaust temperature, can result from                         .

18 / 25

Which of the following should always be checked prior to starting a diesel engine?

19 / 25

When fuel is injected too early in the injection cycle, it may cause the engine to have                         .

20 / 25

When high firing pressures and low exhaust temperatures occur simultaneously in a diesel engine, this may be a result of

21 / 25

What harmful condition can result if a diesel engine is operated at very light loads for long periods of time?

22 / 25

A diesel engine should not be operated at low loads for long periods of time because                            .

23 / 25

The main propulsion diesel continues running after you try to shut down. You should now attempt to                          .

24 / 25

Low compression pressure in a diesel engine can be caused by

25 / 25

A drop in compression pressure in one cylinder of a diesel engine can be caused by                        .

Your score is

The average score is 56%

0%

Practice Set 4

185

Synergy Exam Practice Set 4

Practice Set 4

1 / 25

Low compression in a diesel engine could be caused by

2 / 25

A burned exhaust valve may be detected by a higher than normal

3 / 25

Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits, may cause                          .

4 / 25

Small cracks in the crankshaft bearing surface of a diesel engine are an indication of                             .

5 / 25

Cracking of a diesel piston crown can result from                         .

6 / 25

Late fuel injection timing is indicated by                        .

7 / 25

If the plunger or barrel of a fuel injection jerk pump becomes damaged,                        .

8 / 25

Clogged or partially obstructed exhaust ports on a diesel engine can cause                        .

9 / 25

Crank web deflection readings will give a positive indication of

10 / 25

Combustion knock will most likely occur as a result of using a fuel with                        .

11 / 25

Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring                        .

12 / 25

An increase in crankcase pressure generally indicates

13 / 25

If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or                           .

14 / 25

It is easier to replace a dry cylinder liner than a wet one because

15 / 25

The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in                      .

16 / 25

Worn main bearings will cause the compression ratio of an auxiliary diesel engine to                         .

17 / 25

Abnormal crankpin bearing and piston skirt surface wear indicate

18 / 25

Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?

19 / 25

The formation of carbon monoxide in diesel exhaust gases is reduced by                       .

20 / 25

Problems with the diesel engine fuel injection pump are usually caused by                        .

21 / 25

The consistent burning of fuel oil with a high sulphur content in a diesel engine will result in                         .

22 / 25

Black smoke exhausting from a diesel engine indicates

23 / 25

Water accumulation in the cylinder of a secured engine is an indication that the                         .

24 / 25

An increase in power output of a turbocharged diesel engine operating at a constant engine speed results in                            .

25 / 25

If a two-stroke/cycle diesel engine is overspeeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?

Your score is

The average score is 60%

0%

Practice Set 5

152

Synergy Exam Practice Set 5

Practice Set 5

1 / 25

A dirty lube oil strainer can result in                          .

2 / 25

Starting systems for large, low-speed, direct reversing, main propulsion diesel engines are usually                          .

3 / 25

Starting a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by              .

4 / 25

In a hydraulic starting system, oil to the starting motor flows from the

5 / 25

Which of the following devices controls the discharge flow rate of an attached, positive displacement, rotary gear, diesel engine, lube oil pump?

6 / 25

The pressure differential across a diesel engine lube oil system duplex filter should be checked to                   .

7 / 25

Insufficient piston cooling for a large, low-speed, main propulsion diesel engine burning heavy fuels, can result in                           .

8 / 25

Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will                         .

9 / 25

A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a                          .

10 / 25

An auxiliary diesel engine may fail to start due to                             .

11 / 25

Lubricating oil used in a diesel engine serves to                     .

12 / 25

In a large low-speed diesel engine excessive piston clearance can be restored by                           .

13 / 25

The starting air supply for a diesel engine is generally produced by a/an                        .

14 / 25

Lube oil filters remove contaminants more efficiently if the oil being filtered is                        .

15 / 25

A diesel engine is turned at normal cranking speed, but fails to fire. This can occur from                         .

16 / 25

Crank web deflection readings will give a positive indication of

17 / 25

All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are low. Which of the following situations is responsible for this condition?

18 / 25

Abnormal crankpin bearing and piston skirt surface wear indicate

19 / 25

The total air capacity for non-reversible main engines is to be sufficient for             .

20 / 25

Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are                          .

21 / 25

A burned exhaust valve may be detected by a higher than normal

22 / 25

Low compression in a diesel engine could be caused by

23 / 25

Auxiliary diesel engine electric starting motors use                          .

24 / 25

Starting air valves are held firmly on their seats by                          .

25 / 25

Heat exchangers are most commonly found in a small auxiliary diesel engine                       .

Your score is

The average score is 70%

0%

Practice Set 6

122

Synergy Exam Practice Set 6

Practice Set 6

1 / 25

The pinion of an electric starting motor used with a diesel engine engages the flywheel ring gear by a/an                         .

2 / 25

Each receiver in a starting air system which can be isolated from a relief valve                            .

3 / 25

The timing of diesel engine air starting valves is controlled by

4 / 25

The device used to store a charged pressure for an hydraulic starting system is called the                         .

5 / 25

When excessive fuel dilution is noted in the lube oil, the oil should be

6 / 25

Where may a strainer be located in a diesel engine lubricating oil system?

7 / 25

In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?

8 / 25

Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?

9 / 25

The highest indicated lube oil pressure in a diesel engine should be expected when the engine oil is                 .

10 / 25

An accumulator used in a hydraulic starting system is generally located between the                         .

11 / 25

A diesel engine may be hard to start if the                          .

12 / 25

Air receivers installed in starting air systems are to be                  .

13 / 25

The lube oil cooler is located after the lube oil filter in order for

14 / 25

Which of the following characteristics of lube oil helps to reduce the amount of deposits in the piston ring belt during the combustion process in a diesel engine?

15 / 25

Which of the types of motors listed is used in a hydraulic starter?

16 / 25

Motor vessels usually have independent lube oil systems for main engine and main reduction gears because                             .

17 / 25

If cranking a diesel engine is too slow while attempting to start, it will result in                        .

18 / 25

When fuel enters the crankcase of a diesel engine, it

19 / 25

Auxiliary diesel engine electric starting motors use                          .

20 / 25

Maximum lube system operating pressure for a diesel engine is normally regulated by a/an                         .

21 / 25

Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to                         .

22 / 25

In a diesel engine, maximum lube oil system pressure is normally controlled by                        .

23 / 25

Heat exchangers are most commonly found in a small auxiliary

diesel engine                       .

24 / 25

The thickness of the oil film to be developed in a diesel engine main bearing, depends upon the                          .

25 / 25

Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?

Your score is

The average score is 66%

0%

Practice Set 7

112

Synergy Exam Practice Set 7

Practice Set 7

1 / 25

Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits, may cause                          .

2 / 25

Lube oil in the fresh water cooling system of a diesel engine may result from a                        .

3 / 25

When fuel is injected too early in the injection cycle, it may cause the engine to have                         .

4 / 25

The adverse effects of burning high sulphur fuel can be compensated for by using a cylinder oil having sufficient

5 / 25

The TBN value of diesel engine lube oil refers to its ability to

6 / 25

Sludge formation in a diesel engine lube oil system is caused by

7 / 25

Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to                         .

8 / 25

Lube oil filters remove contaminants more efficiently if the oil being filtered is                        .

9 / 25

The formation of carbon monoxide in diesel exhaust gases is reduced by                       .

10 / 25

Crank web deflection readings will give a positive indication of

11 / 25

The pressure differential across a diesel engine lube oil system duplex filter should be checked to                   .

12 / 25

Starting systems for large, low-speed, direct reversing, main propulsion diesel engines are usually                          .

13 / 25

Late fuel injection in a diesel engine is indicated by low firing pressure with                        .

14 / 25

What harmful condition can result if a diesel engine is operated at very light loads for long periods of time?

15 / 25

If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or                           .

16 / 25

The consistent burning of fuel oil with a high sulphur content in a diesel engine will result in                         .

17 / 25

Late fuel injection timing is indicated by                        .

18 / 25

Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine                           .

19 / 25

Black smoke exhausting from a diesel engine indicates

20 / 25

Which harmful consequence may be the result of lube oil sludge accumulation?

21 / 25

A diesel engine is turned at normal cranking speed, but fails to fire. This can occur from                         .

22 / 25

The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in                      .

23 / 25

Two important considerations for the proper lubrication of a diesel engine include, the delivery of the oil in sufficient amount, and the

24 / 25

Combustion knock will most likely occur as a result of using a fuel with                        .

25 / 25

Abnormal crankpin bearing and piston skirt surface wear indicate

Your score is

The average score is 77%

0%

Practice Set 8

104

Synergy Exam Practice Set 8

Practice Set 8

1 / 25

In a forced circulation auxiliary boiler, steam is formed in the

2 / 25

Which of the following conditions is NOT an indication of microbial contamination?

3 / 25

An exhaust gas bypass is installed on a waste heat boiler in order to

4 / 25

Generating tubes in waste heat boilers are finned to                           .

5 / 25

In order for microbiological growths to thrive in a fuel tank it is necessary for               .

6 / 25

When fuel oil heaters are required for main engine operation,

7 / 25

A substance found in residual fuels which tends to cause exhaust valve corrosion and grooving, is                        .

8 / 25

In diesel engineering practice, the term used to express the ignition quality of a particular fuel is                         .

9 / 25

Failure of the feed pump to deliver feedwater to an auxiliary boiler could be caused by                            .

10 / 25

To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of                         .

11 / 25

One cause of diesel engine fuel ignition delay is                 .

12 / 25

Unusually low oil pressure in the lube oil header of a diesel engine is the result of a/an                          .

13 / 25

The ignition quality of a fuel oil is an important operational consideration because it                         .

14 / 25

Fins are installed on the fireside of the water-tubes used in waste heat boilers to                      .

15 / 25

To determine if the lube oil filter elements need changing,

16 / 25

The Total Base Number(TBN) value of diesel engine lube oil refers to its ability to                           .

17 / 25

Which of the listed conditions can cause a diesel engine to use too much lube oil?

18 / 25

One simple laboratory analysis of used lube oil that can be carried out aboard ship is called the                         .

19 / 25

The major cause of fuel pump and injection system problems is

20 / 25

A sudden decrease in the diesel engine lube oil viscosity could be an indication of                       .

21 / 25

Under normal conditions, the main source of crankcase oil contamination is attributed to                           .

22 / 25

Most type(s) of microbiological growths in fuel are                     .

23 / 25

Diesel engine injection lag is caused by                           .

24 / 25

If the fire goes out in an automatically fired auxiliary boiler and the burner continues to supply fuel, there is a potential danger of

25 / 25

A failure to any component of a flame safeguard control for an automatically fired auxiliary boiler, will result in                             .

Your score is

The average score is 65%

0%

Practice Set 9

106

Synergy Exam Practice Set 9

Practice Set 9

1 / 25

Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?

2 / 25

Injection lag in a diesel engine may be caused by                     .

3 / 25

Which of the listed conditions can be used to determine if lube oil has been diluted by fuel?

4 / 25

It is desirable for an auxiliary boiler safety valve to pop open and

reseat quickly to                   .

5 / 25

Which of the following statements describes the unchecked growth of microbiological organisms within a fuel system?

6 / 25

The purpose of the safety relief valves installed on an auxiliary

boiler is to                      .

7 / 25

Fuel oil contamination of an auxiliary diesel engine lube oil can result in                           .

8 / 25

Microbiological growths in marine fuel are a common occurrence that can be               .

9 / 25

The oxidation by-products forming in diesel engine lube oil can cause                        .

10 / 25

The desirable properties of a marine fuel oil should include

11 / 25

Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?

12 / 25

The flame safeguard control system of a large automatic auxiliary boiler will provide fuel shut off in the case of high                         .

13 / 25

Fuel oil is regularly transferred to the day tank in order to

14 / 25

Which of the two events listed occurs simultaneously in a two- stroke/cycle diesel engine?

15 / 25

Air in the fuel lines to the fuel injection nozzles of a diesel engine will result in                        .

16 / 25

An indication of microbial contamination is              .

17 / 25

With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the                         .

18 / 25

The cetane rating of diesel fuel is an indication of the

19 / 25

When there is a flame failure in an automatically fired auxiliary boiler, the                      .

20 / 25

Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?

21 / 25

Which of the following faults would allow lube oil to enter the cooling system of a diesel engine?

22 / 25

In a full flow type lube oil system, the bypass relief valve will lift due to                           .

23 / 25

In an auxiliary boiler steam and water system, the highest pressure will be in the                       .

24 / 25

A decrease in flash point of diesel engine lube oil indicates lube oil has become                    .

25 / 25

Fusible plugs are installed in fire-tube boilers to                             .

Your score is

The average score is 65%

0%

Practice Set 10

136

Synergy Exam Practice Set 10

Practice Set 10

1 / 25

"Loop," "uniflow," "crossflow," and "return-flow" are terms used to describe various types of                         .

2 / 25

If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?

3 / 25

The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the

4 / 25

Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?

5 / 25

A sudden power loss from a turbocharged and aftercooled diesel engine is an indication of a/an                            .

6 / 25

The term "diesel engine scavenging" means                         .

7 / 25

Which of the listed types of superchargers will NOT have a volumetric capacity proportional to engine speed?

8 / 25

Air scavenging of a diesel engine cylinder                           .

9 / 25

In a turbocharger, inlet air velocity is increased in the

10 / 25

The speed of the turbocharger for a four-stroke/cycle diesel engine driving a generator at constant speed depends on the

11 / 25

A Roots-type blower installed on a direct reversible engine

12 / 25

A turbocharged diesel engine will have an intake manifold pressure

13 / 25

What is the function of the aftercoolers installed in the diesel engine air intake system?

14 / 25

Scavenging in a four-stroke/cycle diesel engine occurs during the

15 / 25

A diesel engine is supercharged in order to                            .