CWEA Maintenance Technologist 1 Practice Questions With Correct Answers

Which process is most commonly used for small pipe maintenance welding? - Answer D. Oxyacetylene gas welding What is the proper definition of an engine? - Answer B. It is machine designed to convert energy into useful mechanical motion What is wet stacking and how can it be prevented? - Answer C.Wet stacking is a condition in diesel engines in which unburned fuel passes on into the exhaust system.[1] The word "stacking" comes from the term "stack" for exhaust pipe or chimney stack. The oily exhaust pipe is therefore a "wet stack". To check a flywheel face runout, where should the dial indicator be positioned? - Answer B. The base of the bell housing and the pointer on the flywheel face If a 38-tooth gear running at 360 rpm is driving another gear at 144 rpm, what is the number of teeth on the driven gear? - Answer B. 95 Which of the following is required for a sealed ball bearing? - Answer C. It does not need to be lubricated under normal use A DAFT is an acronym meaning? - Answer A. Dissolved Air Flotation Thickener What is the governing agency that permits odor control systems? - Answer D. AQMD At what pressure rating would you use a blower instead of a fan? - Answer B. 7psi Which of the following valves is unsuitable for high-pressure flow? - Answer C. A needle valve A sodium hypochlorite tank's full working capacity is 23,000 gallons. Its current level is at 1,200 gallons. How many gallons does the delivery driver need to add to bring it to 70% capacity? - Answer A. 14,900 gal What is the result if 6/8" is converted to decimal form? - Answer A. .75 What is the conversion of 100 Celsius to Fahrenheit? - Answer A. 212 If 17.32v are applied across a resistance of 50 ohms, how much power is expanded in the resistor? - Answer C. 6.0 watts A standard steel plate is 4' wide, 8' long, 1" thick. If steel weighs 490 lbs/ft3, what is the total weight of this plate? - Answer A. 1,306.6lbs What is the volume in cubic feet of carbon media that is 6' thick in a clarifier that has a 50' diameter and 20' deep? Round answer to the nearest cubic foot. - Answer C. 11,781 ft3 A 150-Watt, 120-volt lamp burns constantly for 8 hours at a rated voltage. What is the energy used in watts/hour? - Answer C. 1200 watts/hour Which of the following is 12/16 equal to? - Answer A. 3/4 The property of an electrical circuit restricts the flow of current and: - Answer C. resistance Which of the following can burn the insulation on the supply connections at the motor starter? - Answer C. the connections are loose or have poor contacts Where do you start troubleshooting when an electrical motor fails to operate after observing a mechanical failure? - Answer C. at the power source