Grades & Uses of Motor Oil?

Answer Most people know they are supposed to change the oil in their cars approximately every 3,000 miles or three months, whichever occurs first. However, they may not know much about how their oil works... Read More »

Top Q&A For: Grades & Uses of Motor Oil

A vacuum cleaner is plugged into a 120.0-V socket and uses 3.0 A of current in normal operation when the back emf generated by the electric motor is 72.0 V Find the coil resistance of the motor?

Stable voltage across the motor = (120 - 72) = 48 VR = E / I = 48/3 = 16 ohms.(Assumes power-factor of 1, no reactances, back-emf in phase with the line, etc.)

Properties & Uses for the 4340 Grades of Steel?

Steel alloy 4340 provides a good balance between strength and malleability. It is used in making gun parts, engine parts such as pistons, gears and bearings, and aircraft parts such as landing gear... Read More »

How to Mix Motor Oil Grades?

Most engine oil is premixed with two different viscosity oils, and all engine oil has a rating that denotes both the viscosity when cold and the viscosity when warmed to normal engine operating tem... Read More »

Guide to Motor Oil Grades?

Motor oil serves as a protective lubricant within an automobile's engine. The purpose of this lubricant is to decrease the likelihood of metal grinding on metal, as the motor oil creates a slick bu... Read More »