49. tech A says that when inspecting piston ring grooves for wear, you should place a new rings in the groove and then insert a feeler gauge between the ring and the groove. tech B says that you should simply insert a feeler gauge in the ring groove and then compare the measurement to specification A B Both Neither {Ans: A only ~piston ring clearance is measured by placing a new ring in the groove and then inserting a feeler gauge between the ring and groove}4. while cleaning a pleated paper-type air filter element, the air gun should be held: away from the outside of the air filter element directly against the outside of the air filter element directly against the inside of the air filter element away from the inside of the air filter element {Ans: away from the inside of the air filter element ~when cleaning a pleated paper-type air filter element using compressed air, hold the air gun tip about 6 inches from the inside of the filter element -air should be blown from the inside out to remove particles, and air forced into the filter are too short of a distance may damage the