1) What is oil viscosity a) Oil viscosity is the pressure of the engine oil b) Oil viscosity is a measure of a fluid's resistance to flow, or its “thickness” c) Oil viscosity is the heart of lubricating system d) Oil viscosity is the most important in lubricating system 2) What are the different types of oil viscosity a) lower viscosity and higher viscosity b) heavier and lighter viscosity c) bigger and smaller viscosity d) harder and smoother viscosity 3) Explain the importance of oil viscosity a) prevent engine overheating b) prevent speed c) fuel efficient d) less husstle 4) In motor oil labeled SAE 10W-40**, what does the “10W” represent? a) The oil’s weight in grams b) The oil’s viscosity at low (winter) temperatures c) The oil’s viscosity at high temperatures d) The oil’s detergent level 5) Which type of oil is thicker at high temperatures? a) SAE 5W-30 b) B. SAE 10W-40 c) C. SAE 0W-20 d) D. SAE 5W-20 6) What happens if the oil viscosity is too high for an engine? a) The oil will flow too easily b) B. The engine will start more easily in cold weather c) C. Oil circulation will be poor, increasing wear d) D. Engine temperature will drop too low 7) What does a multi-grade oil (e.g., 5W-30) mean? a) It contains multiple additives for color b) It can perform well at both low and high temperatures c) It has two different densities d) It must be mixed before use 8) Which instrument is commonly used to measure oil viscosity? a) Thermometer b) B. Hydrometer c) C. Viscometer d) D. Manometer 9) If an oil has low viscosity, it will: a) A. Flow easily and reduce friction at startup b) B. Resist flow and provide more film strength c) C. Cause sludge buildup d) D. Evaporate faster than normal 10) Who grade the viscosity of oil a) SAE, API, ISO b) DOST, DICT, ATI c) PAG ASA, BIR, TESDA d) CHED, WHO, EPAS

Oil Viscosity

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