MOTOR – OPERATION

0%
0

MOTOR - OPERATION

1 / 333

If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST __________.

2 / 333

The dripping of fuel from an injector nozzle after injection terminates, often results in ____________.

3 / 333

To successfully reduce an excessively high diesel engine exhaust gas temperature, you should _____________.

4 / 333

Late fuel oil injection in a diesel engine can result in _____________.

5 / 333

Excessive diesel engine cylinder exhaust back pressure will be caused by _____________.

6 / 333

If a few injector spray holes become plugged, the result could be _____________.

7 / 333

When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?

8 / 333

If a crankcase explosion occurs in a diesel engine, you should stop the engine and _____________.

9 / 333

Which of the following conditions may need to be reduced when operating a large, low-speed, main propulsion, diesel engine at low loads?

10 / 333

Which of the listed conditions is most likely to cause a crankcase explosion?

11 / 333

If you notice smoke coming from the crankcase exhaust fan outlet of an operating diesel engine, you would suspect ___________.

12 / 333

Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in ____________.

13 / 333

A large low speed main propulsion diesel engine may becomeoverloaded by_______________. I. a heavily fouled hull II. strong head winds and heavy seas

14 / 333

Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?

15 / 333

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

16 / 333

A broken pintle in a fuel injector usually causes _________.

17 / 333

Which of the following operating procedures should be carried out immediately after any diesel engine is started?

18 / 333

Which of the listed conditions will occur if a diesel engine exhaust valve is leaking?

19 / 333

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

20 / 333

The air supplied to a diesel engine is compressed to___________.I. provide heat for the ignition of the fuel II. decrease injection delay

21 / 333

To successfully reduce an excessively high diesel engine exhaust gas temperature, you should _____________.

22 / 333

Immediately after starting a diesel engine, normal raw waterand jacket water pressures are indicated. However, thejacket water temperature continues to rise. If there is nochange in the sea temperature, you should suspect _________.

23 / 333

A loose crosshead plunger assembly in a metering or proportioning pump will cause _____________.

24 / 333

Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?

25 / 333

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

26 / 333

Which of the following problems could cause misalignment between the needle valve and nozzle in a fuel injection nozzle?

27 / 333

Which of the terms listed below represents the operational speed at which excessive engine vibration is created?

28 / 333

Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by _____________.

29 / 333

Which of the following conditions is most likely to occur when unburned fuel contaminates the crankcase of a diesel engine?

30 / 333

The overspeed trip installed on most diesel engines will stop the engine by shutting off the ____________.

31 / 333

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?

32 / 333

Diesel fuel oil having a low cetane rating can result in _____________.

33 / 333

Faulty operation of diesel engine fuel injection nozzles can be a direct cause of ______________.

34 / 333

Which of the listed conditions will occur if a diesel engine exhaust valve is leaking?

35 / 333

A sudden drop in diesel engine cylinder compression pressure can be caused by ____________.

36 / 333

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

37 / 333

By comparing the exhaust gas output of each cylinder of a diesel engine, one method of determining if the engine load is balanced is by the use of a ______________.

38 / 333

An increase in the air inlet manifold pressure of a diesel engine will result in a/an ____________.

39 / 333

A large low speed main propulsion diesel engine may becomeoverloaded by_______________. I. a heavily fouled hull II. strong head winds and heavy seas

40 / 333

A crack in a cylinder liner can be caused by _____________.

41 / 333

Collapsed hydraulic valve lifters in a diesel engine will result in ____________.

42 / 333

The highest loads applied to the diesel engine crankshaft main bearings are ____________.

43 / 333

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 ______________.

44 / 333

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

45 / 333

An increase in the fuel injection pump discharge pressure can be caused by a/an _____________.

46 / 333

A dry-type exhaust muffler clogged with soot, will cause _____________.

47 / 333

Excessive diesel engine cylinder exhaust back pressure will be caused by _____________.

48 / 333

A diesel engine emits blue exhaust smoke as a result of _____________.

49 / 333

A fuel leak occurs in the high pressure fuel piping between the injection pump and fuel nozzle. This requires immediate repair because of the _____________.

50 / 333

An increase in the load on a turbocharged diesel engine operating at constant speed will result in an increase in _____________.

51 / 333

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?

52 / 333

A diesel engine emits blue exhaust smoke as a result of _____________.

53 / 333

Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages?

54 / 333

When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will be indicated?

55 / 333

Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will _____________.

56 / 333

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

57 / 333

What is the best way of stopping an overspeeding diesel engine?

58 / 333

One cause of diesel engine piston ring blow-by is _________.

59 / 333

If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST __________.

60 / 333

The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?

61 / 333

A change in the degree of fuel atomization in a diesel engine cylinder has the greatest effect on the ____________.

62 / 333

One cylinder of a diesel engine is persistently knocking and does not cease when the fuel supply to that cylinder is secured. Which of the following problems may be the cause?

63 / 333

On a turbocharged, medium-speed, diesel engine, which of the following problems is an indication of a restricted air intake passage?

64 / 333

A diesel engine is operating under a normal load with low firing pressures and high exhaust temperatures. The most probable cause of this condition is ________________.

65 / 333

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?

66 / 333

Which operating condition of a diesel engine is indicated by excessive firing pressures?

67 / 333

Fuel droplets injected into a diesel engine cylinder must have adequate penetration to _____________.

68 / 333

White smoke exhausting from an operating diesel engine may indicate _____________.

69 / 333

On a large diesel engine installation, crankshaft axial alignment is maintained by the ______________.

70 / 333

In the common rail system, excessive pressure in the header may be caused by _____________.

71 / 333

Collapsed hydraulic valve lifters in a diesel engine will result in ____________.

72 / 333

A diesel engine is operating with excessively high exhaust temperatures at all cylinders. To correct this condition, you should FIRST _____________.

73 / 333

Diesel engine cylinder head test cocks are used to ________.

74 / 333

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

75 / 333

The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is _________________.

76 / 333

Which of the following conditions is likely to develop if the thermocouple element of a pyrometer becomes coated with excessive amounts of combustion by-products?

77 / 333

If a few injector spray holes become plugged, the result could be _____________.

78 / 333

Combustion knock occurring in a diesel engine can be caused by _____________.

79 / 333

A diesel engine piston crown can crack from ____________.

80 / 333

Diesel engine cylinder head test cocks are used to ________.

81 / 333

If the coolant temperature is too low as it passes through internally cooled fuel injectors, the injectors can be damaged by ________________.

82 / 333

Diesel fuel oil having a low cetane rating can result in _____________.

83 / 333

The most common diesel engine fuel system problems are caused by _____________.

84 / 333

The ignition quality of diesel fuel becomes less critical as ______________.

85 / 333

If the needle valve in a fuel injection nozzle sticks open, _____________.

86 / 333

The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the _____________.

87 / 333

If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will _____________.

88 / 333

The direct cause of a crankcase explosion can be attributed to ______________.

89 / 333

A substantial increase in crankcase pressure could be an indication of a/an _____________.

90 / 333

Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____________.

91 / 333

Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and _____________.

92 / 333

A smoking exhaust from an operating diesel engine could be caused by ______________.

93 / 333

If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST __________.

94 / 333

If sludge accumulates on the underside of a diesel engine piston, it will ______________.

95 / 333

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

96 / 333

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

97 / 333

Combustion knock occurring in a diesel engine can be caused by _____________.

98 / 333

Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?

99 / 333

Faulty operation of diesel engine fuel injection nozzles can be directly caused by _____________.

100 / 333

If sludge accumulates on the underside of a diesel engine piston, it will ______________.

101 / 333

Excessive exhaust temperatures in a two-stroke/cycle dieselengine can be caused by a/an ____________.

102 / 333

Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?

103 / 333

Exhaust pyrometer readings provide an indication of the _____________.

104 / 333

Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?

105 / 333

A change in the degree of fuel atomization in a diesel engine cylinder has the greatest effect on the ____________.

106 / 333

One cause of diesel engine piston ring blow-by is _________.

107 / 333

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

108 / 333

Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?

109 / 333

The direct cause of a crankcase explosion can be attributed to ______________.

110 / 333

Combustion knock occurring in a diesel engine can be caused by ________________.

111 / 333

If a diesel engine is smoking excessively under load, the cause could be _____________.

112 / 333

Significant retardation of a diesel engine fuel injection timing will result in _____________.

113 / 333

When a diesel engine is operated at partial load, as compared to full load, a decrease will occur in the average _____________.

114 / 333

Permitting a diesel engine fuel oil day tank to run dry can cause _____________.

115 / 333

The most practical way of detecting an overload in one cylinder of an operating large, low-speed, main propulsion diesel engine is to _____________.

116 / 333

Which of the following conditions can cause excessive lube oil consumption in a diesel engine?

117 / 333

The highest pressure in a diesel engine cylinder normally occurs _____________.

118 / 333

Sticking of diesel engine piston compression rings may be caused by _____________.

119 / 333

Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?

120 / 333

The highest loads applied to the diesel engine crankshaft main bearings are ____________.

121 / 333

A naturally aspirated diesel engine at full throttle will have an intake manifold pressure ____________.

122 / 333

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

123 / 333

A device which functions to bring a diesel engine to a full stop to protect it from damage is known as a/an ___________.

124 / 333

Which of the following conditions will develop if the flow of "raw" cooling water to a diesel engine is obstructed?

125 / 333

A main propulsion diesel engine is normally shut down by _____________.

126 / 333

Which of the listed reasons is the most likely cause of a sudden drop in compression pressure in one diesel engine cylinder?

127 / 333

A diesel engine will lose power if fuel injection occurs too late in the cycle, because the ______________.

128 / 333

A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to _____________.

129 / 333

A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to _____________.

130 / 333

In a diesel engine, blow-by _____________.

131 / 333

Operating a diesel engine for prolonged periods, with a closed freshwater cooling system, at temperatures lower than the normal design temperature can cause _____________.

132 / 333

Early injection timing is indicated by ____________.

133 / 333

High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by _____________.

134 / 333

A distorted spray pattern from a fuel injector can cause a diesel engine to have _____________.

135 / 333

A restricted diesel engine exhaust manifold operating under a normal load is indicated by ______________.

136 / 333

Faulty operation of diesel engine fuel injection nozzles can be directly caused by _____________.

137 / 333

When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer, the _____________.

138 / 333

During which of the listed piston strokes of a four-stroke/cycle diesel engine, is the piston moving downward?

139 / 333

A diesel engine could fail to start because of ____________.

140 / 333

Late fuel injection in a diesel engine is indicated byblack or gray exhaust smoke with a _____________.

141 / 333

One cylinder of a diesel engine is persistently knocking and does not cease when the fuel supply to that cylinder is secured. Which of the following problems may be the cause?

142 / 333

Diesel engine air start valve timing is controlled by _____________.

143 / 333

The most common diesel engine fuel system problems are caused by _____________.

144 / 333

Air in the fuel can cause _____________.

145 / 333

The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is _________________.

146 / 333

Which of the following problems could cause misalignment between the needle valve and nozzle in a fuel injection nozzle?

147 / 333

Diesel engine operating conditions are indicated by the color of the exhaust smoke. Blue smoke can indicate _____________.

148 / 333

If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the _____________.

149 / 333

A main propulsion diesel engine is normally shut down by _____________.

150 / 333

By comparing the exhaust gas output of each cylinder of a diesel engine, one method of determining if the engine load is balanced is by the use of a ______________.

151 / 333

What occurs in the combustion space of a diesel engine cylinder shortly after ignition and before the piston reaches TDC?

152 / 333

Low cylinder compression pressure and a high exhaust temperature may indicate ______________.

153 / 333

Crankcase explosions in propulsion diesel engines result from _____________.

154 / 333

Air in the fuel can cause _____________.

155 / 333

Which of the following conditions is likely to develop if the thermocouple element of a pyrometer becomes coated with excessive amounts of combustion by-products?

156 / 333

A diesel engine will lose power if fuel injection occurs too late in the cycle, because the ______________.

157 / 333

White smoke exhausting from a diesel engine can result from ____________.

158 / 333

When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer, the _____________.

159 / 333

White smoke exhausting from an operating diesel engine may indicate _____________.

160 / 333

Air may be bled from the fuel system by _____________.

161 / 333

White smoke exhausting from a diesel engine can result from ____________.

162 / 333

Which of the following conditions can cause oil to accumulate in the cooling system of a diesel engine?

163 / 333

A sudden drop in diesel engine cylinder compression pressure can be caused by ____________.

164 / 333

If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST __________.

165 / 333

If the coolant temperature is excessively low as it passes through the internally cooled fuel injectors, the injectors may be damaged by _____________.

166 / 333

Before starting a diesel engine that has an engine driven lube oil pump, the engineer should _____________.

167 / 333

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?

168 / 333

The overspeed trip installed on most diesel engines will stop the engine by shutting off the ____________.

169 / 333

Before starting a diesel engine that has an engine driven lube oil pump, the engineer should _____________.

170 / 333

Diesel engine cylinder head test cocks are used to ________.

171 / 333

The most crucial time for any bearing with regards to lubrication is _____________.

172 / 333

Combustion knock occurring in a diesel engine can be caused by ________________.

173 / 333

Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to _____________.

174 / 333

During diesel engine warm-up, which type of tappet clearance adjuster listed allows for the change in length of the exhaust valves?

175 / 333

The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?

176 / 333

Black smoke exhausting from an operating diesel engine can be caused by _____________.

177 / 333

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

178 / 333

If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the _____________.

179 / 333

In a naturally aspirated diesel engine, the volume of air intake is directly related to engine ________________.

180 / 333

Which of the following conditions may need to be reduced when operating a large, low-speed, main propulsion, diesel engine at low loads?

181 / 333

Excessive exhaust temperatures in a two-stroke/cycle dieselengine can be caused by a/an ____________.

182 / 333

A diesel engine piston crown can crack from ____________.

183 / 333

The amount of fuel injected into a cylinder by a unit injector is controlled by _____________.

184 / 333

Early injection timing is indicated by ____________.

185 / 333

If fuel injection occurs too early, a diesel engine will lose power because the _____________.

186 / 333

A fuel injection valve opening at a pressure lower than normal will result in _____________.

187 / 333

In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______________.

188 / 333

If fuel injection occurs too early, a diesel engine will lose power because the _____________.

189 / 333

During which of the listed piston strokes of a four-stroke/cycle diesel engine, is the piston moving downward?

190 / 333

Heat damage to fuel injection nozzles can be prevented by avoiding _____________.

191 / 333

Which of the terms listed below represents the operational speed at which excessive engine vibration is created?

192 / 333

A diesel engine is warmed up and white vapour is noted in the exhaust, this could indicate _____________.

193 / 333

What occurs in the combustion space of a diesel engine cylinder shortly after ignition and before the piston reaches TDC?

194 / 333

When fuel is injected late into a diesel engine cylinder, _____________.

195 / 333

The ignition quality of diesel fuel becomes less critical as ______________.

196 / 333

Immediately after starting a diesel engine, normal raw waterand jacket water pressures are indicated. However, thejacket water temperature continues to rise. If there is nochange in the sea temperature, you should suspect _________.

197 / 333

When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will be indicated?

198 / 333

Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to _____________.

199 / 333

Black smoke exhausting from an operating diesel engine can be caused by _____________.

200 / 333

If the coolant temperature is excessively low as it passes through the internally cooled fuel injectors, the injectors may be damaged by _____________.

201 / 333

High firing pressures and a low exhaust temperature in a diesel engine may result from _____________.

202 / 333

A diesel engine fails to start due to excessive water in the fuel. Before the engine can be started, the water should be removed from the _____________.

203 / 333

Which of the listed reasons is the most likely cause of a sudden drop in compression pressure in one diesel engine cylinder?

204 / 333

When a fuel injection nozzle overheats, which of the problems listed can be expected?

205 / 333

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 ______________.

206 / 333

Lube oil accumulating in the cooling water system of a diesel engine will result in _____________.

207 / 333

The most crucial time for any bearing with regards to lubrication is _____________.

208 / 333

High exhaust back pressure will result in an increase in ______________.

209 / 333

When a diesel engine is operated at partial load, as compared to full load, a decrease will occur in the average _____________.

210 / 333

A diesel engine is operating under a normal load with low firing pressures and high exhaust temperatures. The most probable cause of this condition is ________________.

211 / 333

If a single cylinder relief valve on a diesel engine lifts frequently while the engine is running, the cause may be an _____________.

212 / 333

The injection pressure of a hydraulic fuel injection nozzle can be increased by _____________.

213 / 333

A diesel engine is operating with excessively high exhaust temperatures at all cylinders. To correct this condition, you should FIRST _____________.

214 / 333

Low cylinder compression pressure and a high exhaust temperature may indicate ______________.

215 / 333

If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will _____________.

216 / 333

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

217 / 333

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

218 / 333

When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?

219 / 333

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

220 / 333

A diesel engine could fail to start because of ____________.

221 / 333

In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______________.

222 / 333

Oil accumulating in the exhaust piping or manifold of a diesel engine can be caused by ________________.

223 / 333

The dripping of fuel from an injector nozzle after injection terminates, often results in ____________.

224 / 333

One problem resulting from a diesel engine fuel injector opening pressure being lower than specified by the engine manufacturer, is that the _____________.

225 / 333

Late fuel oil injection in a diesel engine can result in _____________.

226 / 333

Higher than normal temperature air passing through the intake of a diesel engine will result in _____________.

227 / 333

Higher than normal temperature air passing through the intake of a diesel engine will result in _____________.

228 / 333

The highest pressure in a diesel engine cylinder normally occurs _____________.

229 / 333

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

230 / 333

During diesel engine warm-up, which type of tappet clearance adjuster listed allows for the change in length of the exhaust valves?

231 / 333

Diesel engine lube oil diluted with fuel oil is indicated by _____________.

232 / 333

If fuel injection in a diesel engine begins earlier than the design start of injection, ignition may be delayed because the _____________.

233 / 333

Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?