An apparatus is provided for testing functionality of an engine cylinder deactivation control and system having a plurality of solenoid-operated valves for controlling hydraulic actuation of switching valve lifters. The impact modifier blend concentrates are useful to form objects that resist fracturing upon impact, in particular materials that require toughness at low temperatures, such as sports equipment and dual ovenable trays. The post is removable from the between the side plates to permit the loop to be attached or detached from the block. 5\u2266A+B\u22663\u2003\u2003Formula 10\u2266A\u22661. Purging fluid in the reservoir can be flowed between the conductors and the supply contacts to remove conductive fluid prior to engaging the conductors and supply contacts.