CWEA Practice Test Questions and Answers for Various Topics, Exams of Computer Science

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W hich welding process is most commonly used for SMALL pipe maintenance welding? - OxyAcetylene gas welding What is the proper definition of an engine? - It is a machine designed to convert energy into useful mechanical motion What is wet stacking and how can it be prevented? - It is unburned fuel collecting in the exhaust due to light or no load conditions To check flywheel face runout, where should the dial indicator be positioned? - The base on the bell housing and pointer on the flywheel face If a 38-tooth gear running at 360 rmp is driving another gear at 144 rmp what is the number of teeth on the driven gear? - 95 Which of the following is required for a sealed ball bearing? - It does not need to be lubricated under normal use A DAFT is an acronym meaning: - Dissolved Air Flotation Thickener What is the governing agency that permits odor control systems? - AQMD At what pressure rating would you use a blower instead of a fan? - 7 psi Which of the following valves is unsuitable for high-pressure flow? - 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? - 14,900 gal. What is the result if 6/8 " is converted to decimal form? -. What is the conversion of 100° Celsius into Fahrenheit? - 212° If 17.32 v are applied across a resistance of 50 ohms, how much power is extended in the resistor? - 6.0 watts A standard steel plate is 4' wide, 8' long, and 1' thick. If steel weighs 490 lbs/ft^3, what is the total weight of this plate? - 1,306.6 lbs

What is the volume in cubic feet of carbon media that is 6' thick in clarifier that has 50' diameter and is 20' deep? Round answer to the nearest cubic foot. - 11,781 ft^ A 150-watt, 120-volt lamp burns constantly for 8 hours at a rated voltage. What is the energy used in watts/hours? - 1,200 watts/hours Which of the following is 12/16 of one inch equal to? - 3/4 inch The property if an electrical circuit restricts the flow of current and: - resistance Which of the following can burn the insulation of the supply connections at the motor starter? - 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? - At the power source What does NEC stand for? - National Electrical Code What is a pipe union typically used for? - It is used to connect pipes Which of the following electrical circuits had more than one path for the current to flow? - Parallel circuit Overloading of an electrical circuit may be caused by which of the following? - Connecting loads that draw too much current What type of current is stored in 9-volt battery? - Direct current What does GFI stand for? - Ground Fault Interrupter What does EMT stand for? - Electrical Metal Tubing What device would be used to measure AC current flow in a large diameter conductor? - A clamp-on type ammeter What is the purpose of electrical interlock switches on panel doors? - To interrupt local power for personal protections Which of the following actions should be taken before working on controls that may disrupt plant operations? - Have an operator present (this is not an action) What is the purpose of installing toe boards around the base where guard rails are placed along elevated work areas? - As protection from tools or objects that may roll off What action is necessary before restarting rotating equipment that has recently undergone repair? - All removed guards must be installed

What is the main purpose of a confined space safety permit? - It ensures the use of safety precautions and safe procedures The acronym "LOTO" is used to identify: - Lock Out/Tag Out What does the acronym SDS represent? - Safety Data Sheet Which problem will NOT occur when a person works in a very hot area for prolonged period of time? - hypothermia When leaving a remote lift station, why is it important to secure the station? - To prevent vandalism and possible injury to trespassers What is the purpose of a breakaway switch? - To apply the brakes on a trailer in the event of a trailer release from a vehicle According to the image, what does this hand signal indicate? - Raise load slowly According to the image, what does this hand signal asking to do during a rigging operation?

• Raise boom and lower load Heavy objects are made mostly of: - iron and steel Which threads are tapered to provide a pressure tight and watertight seal? - NPT Threads When installing a bearing with a press fit onto a shaft, the pressure should be applied to: - the inner race What type of saw is used to cut metallic materials? - hacksaw What tool would be used to install tight fitting bearings? - A stationary hydraulic press Which of the following is most true about a chuck key for a drill press? - It should be attached to the drill press by a short chain or cable A rotary hammer drill is used to drill: - concrete A bourdon tube in pressure gauge is normally of what design? - C-shape Which tool is most commonly used to machine keyways in hubs or bores? - broach A fabricated piece of 12-inch diameter pipe, 48 feet long, weighs 35 pounds per lineal foot. What is the weight of the total load? - 1,680 lbs

Jaime must paint a 16" wide, red stripe completely around a water tank at a centered height of 18 feet. The tank's dimensions are 25 feet high and 150 feet in diameter. How long, in linear feet, will the stripe be? - 471 feet Why is water commonly omitted from the concrete ratio? - Because the amount of water used involves a consideration of both the degree of exposure and strength requirements of the complete structure. How much coat is needed to properly protect a tank or channel from deterioration? - Two or more coats A scale on a blueprint indicates 1" = 2". What does the scale mean? - Each line on the print is shown half its actual size Using the table, calculate the head loss in psi for 2000 ft section of new 10" Cast Iron pipe with a flow of 650 GPM. - 2. Which of the following should be used to guide the frequency schedule of a preventative maintenance? - The amount of continuous usage of the equipment Of the following, which is the first step to create a preventative maintenance? - Get all drawings needed, such as the building equipment drawing or other map of the plant or process that lists all the equipment and show the location. A computerized maintenance management system is a/n: - tool Of the following, which is the LEAST important when accepting a work order from wither a superior or from an assigned group work order. Remember choose the LEAST important. - You need for speedy completion. After all, they are assigned and when you want to look good. You are working along with a coworker to do a preventative maintenance task and you notice that they are not taking notes for record keeping. Since you know your coworker to be a good team member and will take advice well, which of the following reasons should you give to make sure he takes notes on the maintenance. - Records are needed to show the type and frequency of maintenance of operating units and to evaluate the effectiveness of the maintenance programs