Assignment  5 Engine  Maintenance  (cont'd) Textbook Assignment: Engineman 1&C, NAVEDTRA 10543-E1, Pages 3-25 through 3-41 Learning  Objective:  Describe  the types  of  piston  and  rod  assemblies used  in  internal  combustion  engines, recognize  symptoms  of  malfunctions and their causes, and indicate the type  of  actions  that  may  prevent  the recurrence  of  such  troubles. 5-1. 5-2. 5-3. 5-4. Question 5-1 is to be judged either True or False. Before attempting to jack an internal combustion engine over by hand, you should  first  disable  the  starter circuit. Which of the following symptoms indicate(s)  that  the  clearance  between the  piston  and  cylinder  is  above tolerance? 1. Excessive  oil  consumption 2. Piston  slap  after  top  dead  center 3. Piston  slap  after  bottom  dead  center 4. All of the above On Navy engines,    piston defects are NOT likely to be caused by which of the following   conditions? 1. Unbalanced  load 2. Insufficient   lubrication 3. Crown  and  land  dragging 4. Excessive  piston  liner  clearance Operation of an internal combustion engine above the specified temperature limits may result  in  which  of  the  following  problems? 1. No  lubrication  of  the  cylinder  walls 2. Low  cylinder  temperatures 3. Increased  oil  viscosity 4. High  oil  temperatures 5-5. If the oil flow to a piston is restricted, where will the oxidation of the oil cause deposits  to  form? 1. On the underside of the piston crown 2. Behind  the  compression  rings 3. On  the  piston  walls 4. On  the  piston  crown 5-6. When the clearance between the piston and the  cylinder  liner  is  too  small,  the piston  will  NOT  likely 1. seize 2. bind 3. break 4. wear  in 5-7. The wiping of metal causes the rings to stick  in  the  piston  grooves. What is this action  called? 1. Scoring 2. Scuffing 3. Calling 4. Wiping 5-8. Which of the following actions is/are required  to  balance  the  load  on  each piston of an auxiliary generator diesel engine? 1. Setting  the  fuel  rack 2. Checking  the  compression  pressures 3. Checking  the  firing  pressures 4. All of the above 5-9. Cracking of the ring groove lands on a piston can be attributed to which of the following   conditions? 1. Excessive   piston-to-cylinder   clearance 2. Insufficient  clearance  between  the ends of the rings 3. Insufficient   ring-to-land   clearance 4. Each of the above 29