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10. a driver complains that her oil pressure light flickers on and off …

Question

  1. a driver complains that her oil pressure light flickers on and off at cruising. technician a says the oil level in the engine should be checked. technician b says that the oil pressure switch is faulty. who is correct?
  2. each of the following problems may be found in a lubrication system except?

a. low oil pressure
b. high oil pressure
c. low oil consumption
d. high oil consumption

  1. external oil leakage may be detected by:

a. high oil consumption
b. oil puddles under vehicle
c. oil - wet areas around engine
d. all of the above

  1. oil dye is sometimes added to motor oil to detect leaks. t or f?
  2. which of the following is not a common cause of low oil pressure?

a. worn oil pump
b. thin or diluted oil
c. leaking valve stem seal
d. clogged pick - up oil screen

  1. upon encountering a uncommon high oil pressure problem, technician a says its problem is low oil viscosity. technician b says the cause is low relief valve spring tension. who is right?
  2. each of these should be followed when changing engine oil and the oil filter except tighten the oil filter with the oil filter wrench. t or f?
  3. an engine oil pan may need to be removed to 1) service an oil pump, 2) repair a damaged pan, 3) perform an engine overhaul. t or f?
  4. a prelubricator is used to perform each of the following tasks except:

a. locate worn engine bearings
b. keep contaminants out of oil
c. prime oil galleries after overhaul
d. force oil through system without engine on.

Explanation:

To solve these automotive - related questions, we analyze each one based on automotive engineering (a sub - field of Engineering under Natural Science) knowledge:

Question 10 (Incomplete, but assuming typical scenario)

If a driver complains about the oil pressure light, and we consider the engine's oil system: The oil level in the engine should be checked (as low oil level can cause low pressure), and also the oil pressure sending unit. But since the question is about who is correct (Technician A and B, though details are cut off), typically, checking oil level and the sending unit are part of the diagnosis.

Question 11

In a lubrication system (engine's oil system):

  • Option a: Low oil pressure can be a problem (e.g., due to worn pump, clogged screen).
  • Option b: High oil pressure is also a problem (e.g., stuck relief valve).
  • Option c: Low oil consumption is not a problem in the lubrication system context (we want proper consumption, high consumption is a problem due to leaks or burning).
  • Option d: High oil consumption is a problem (leaks, burning oil). So the answer is c (Low oil consumption is not a problem in a lubrication system event as the others are issues related to the oil system's function or malfunction).
Question 12

External oil leakage detection:

  • Option a: High oil consumption can be due to internal or external leaks, but it's not a direct detection method for external leakage.
  • Option b: Oil puddles under the vehicle are a direct sign of external leakage (oil drips and forms puddles).
  • Option c: Oil - wet areas around the engine are a sign of external leakage (oil seeps and wets the engine's exterior).
  • Option d: Oil on the dipstick is related to oil level, not external leakage. So the correct options for detecting external leakage are b and c (if multiple answers are allowed; if single, b is a very direct sign).
Question 13

Oil dye is added to motor oil to detect leaks. The dye makes the oil more visible when it leaks (e.g., under UV light or just by color), so the answer is T (True).

Question 14

Common causes of low oil pressure:

  • Option a: Worn oil pump can't generate enough pressure (common cause).
  • Option b: Thin or diluted oil (low viscosity) can't maintain pressure (common cause).
  • Option c: Leaking valve stem seal causes oil consumption (internal leak), not low pressure directly.
  • Option d: Clogged pick - up oil screen restricts oil flow to the pump, causing low pressure (common cause). So the answer is c (Leaking valve stem seal is not a common cause of low oil pressure as it affects consumption more than pressure).
Question 15

Technician A says low oil viscosity causes high oil pressure (wrong, low viscosity causes low pressure). Technician B says low relief valve spring tension causes high oil pressure (wrong, low spring tension would cause low pressure as the relief valve opens too easily). But if we assume the question has a typo and it's high oil pressure problem: Low oil viscosity would cause low pressure, so Technician A is wrong. Low relief valve spring tension: if the spring is weak, the relief valve opens at low pressure, so to get high pressure, the spring tension should be high. So neither is right, but if we go by typical errors, the answer depends on the exact Technician statements (but with given info, likely both are wrong, but since we need to choose, maybe re - evaluate. Wait, the question is "Upon encountering a uncommon high oil pressure problem...", low oil viscosity causes low pressure, so Technician A is wrong. Low relief valve spring tension: t…

Answer:

s (selected questions with clear answers):

  1. c
  2. T
  3. c
  4. (Depends on Technician statements, but as per analysis, c)
  5. F
  6. T
  7. b

(Note: Some questions have truncated text, so the analysis is based on typical automotive engineering knowledge and assumptions about the full questions.)