CWEA Mechanical Technologist Grade II Test 2026 Study Guide, Exams of Mechanical Systems Design

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CWEA Mechanical Technologist Grade II Test 2026 Study Guide

“1 I I I I I I I I I I I I I I I I I I I I I I I I al CWEA Mechanical Technologist Grade II Test 2026 Study Guide Carbon Dioxide fire extinguishers are intended for use on what class of fires? - CORRECT ANSWER -Class B and class C How does CAL-OSHA define a confined space? - GORRECTENSWER Limiced or restricted means of entry or exit, large enough to bodily enter and perform work, and is not designed for continuous human occupancy. ‘Whar section of an MSDS gives safe exposure limits based on OSHA guidelines? - G@RRECTANSIWERI- Hazardous information and ingredients. The tool rest on a grinder should be positioned within of the wheel surface wo prevent stock from geving caught. - SORREGIIANSWERE 1/8 inch. Pneumatic tools should all be equipped with whav? - GORREGIINSWERI Air line lubricator. What is the purpose of a cage in anti friction bearings? - GORRECTANSWER Properly space the rolling elements and guide them through the load zone. The reducer located on the suction side of a horizontally mounted centrifugal pump should be what? - When aligning a piece of equipment what should you do first? - GORRECTANSWER)- Complete the vertical part of the alignment first. r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al When dealing with screw threads, UNC stands for whac? - SORREGHENSWER Unified national coarse. What is backlash on a gear? - GORREGTANSWERE-The play between gears that prevents binding, What is che initial step in preparation for installation of machinery? - CORRECT ANSWER -Locate the baselines, What is the most popular welding process in use today? - GORRECIANSWER Shielded metal-are. You have been informed that your centrifugal pump was discharging properly and now it is not, what is the issue? - CORRECT ANSWER -Air or vapor in liquid. Ifyou have been given written instructions that you don't understand, what should you do? - CORRECT ANSWER Ask the author for clarification. An SCBA is used for what kind of work? CORRECT ANSWER -Escape and rescue. When is a piece of equipment considered LOTO and safe to work on? CORRICTANSWERL When you have brought the machine to zero energy state using LOTO, Prescription eyeglasses that can be worn in an industrial setting must be approved by what agency CORRECT ANSWER -ANSI Whar is the device on a power tool chat cuts off power when released? - GORRECIANSWERL Deadman switch, What oype of saw is designed to cut wood with the grain? - GORRECIANSWERE Ripsaw. r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al Making job planning a group effort does what? The NEC identifies environments that contain flammable vapors and gases as which class of hazardous CORRECT ANSWER-Cis location: What reduces high voltages and currents to safe values for measurements? Instrument transformers, What is always required when working in a confined space? monitoring. Osygen deficiency occurs when the oxygen level is less than what by volume? 19.5% by volume. Where is the best place to find out what personal protective gear is necessary when working with a chemical? - CORREGHENSWERL MSD oe sps. The lack of an unpleasant odor in a manhole, lift station or other structures does not always mean that dangerous gases are not present because wh What is the first step to take when preparing to perform maintenance or repairs on an operating piece of equipment? - GORRECTANGWERN otify all affected employees that equipment is going to be locked out and explain the reason for the lock out. Rubber safety gloves should be tested how often? - GORRECTANSWER Every 6 months. Rubber safety blankets should be tested how often? - GORRECTENSWER Every 12 months. GORRECTENSWER Some dangerous gases have no odor. r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al ‘Whac is che interrupting current ofa GFIC receptacle? - SORRECIANSWER!- What type of stepladder is forbidden while working on electrical equipment? - CORRECT ANSWER - Aluminum. Whar is the killer of electrical shock? GORRECTANSWER. Current. The relationship becween an electric current and a magnetic field is called what? - SORREGIANSIVER- Electromagnetism. An on-off switch with overload relays is called what? - GORRECTANSWER! Manual starter, The amount of potential difference a layer of insulation can withstand is called what? ANSWER Dielectric strength. What is the current in amperes of a 120-volt circuit with a resistance of 60 ohms, using Ohm's law? - Whar is the current of a 120-vole circuit with a 1440-watt load? - GORRECHANSWERL 12 amperes Whar is the current of a circuit hat consumes 625 watts through a 12.75-ohm resistor? - CORRECT Awet well measures 30 feet deep, 25 feet wide and 35 feet long, What is the capacity in gallons? - CORREGHANSIVERE 196.350 gl r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al Ds ce eee ee ee es A power installation drawing shows wha’ - SORREGIANSWER! Power oudets Dual-voltage motors are connected how? - GORRECTANSIWERELither Y- or Delta-connected. A parking lot has a bank of ten 400W lights that operate 1Ohes a day and a 150W sign that operates all day. CORRUCTANSWNERE 12.26 What is the electric cost for 30 days at $0.095 per kilowatt hour? Predictive maintenance can be best described as? - GORRECTANSWER Taking measurements on equipment under operating conditions in order to detect symptoms that are not in line with predetermined parameters and classify che causes. When working with electricity, it is especially important to inspect tools for what? - CORRECT ANSWER - Damaged insulation. When a flow meter does not read properly, what should you check? - GORRECTANGWER Power toa circuit, primary element, and transmitter/receiver. ‘Whee caegory rating on a meter would be used on service drop? - SOREEGINANSIER Cac 4 What category rating on a meter would be used on protected electronic equipment? - CORRECT ANSWER Cat il. The supply of spare parts, tools, and cest instruments should be monitored by who? -The inventory control operation. Whar is the best choice of work clothing fabric when working with electricicy? - GORRECIANSWERI- Nomex. bua ee ee ee ee eee ee ee ee ee eee eee eee “1 I I I I I I I I I I I I I I I I I I I I I I I I al What isthe best combination of gloves to wear when performing electrical work? - RREGHARISSVER'- Leather over cubber. ‘Whar is the function of the tag and lockout disconnect switch in LOTO? - GORREGIANSWERD Identify the individual who placed the lock. What is the best protection against the risk of infections and infectious diseases? Personal hygiene. What are the basic elements of a hazard communication program? - GORRECMANS WER! Identify hazardous materials, chemical info and hazardous conditions, labels and training. What is the main hazard associated with electrical energy CORRECT ANSWER -Blest, Are, Shock. When considering an accident that resulted in an injury, what is che most valuable piece of information? - CORRECTING WER) The cause of the accident. Which type of saw is best used for cutting metal? - GORREGINANSWER) Hacksaw. One cubic centimeter (cc) of water is equal to what? - CORRECT ANSWER -One gram. What type of maintenance is the least sophisticated and is normally only used on equipment that is inexpensive and noncritical co plane operations? - SORREGIMANSWER Breakdown maintenance work is requested, discovered during periodic inspections, or discovered while performing other maintenance tasks, GORRECTANSWER! Corrective work. r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al Tests using normally involve applying a test voltage that is several times higher than the specified operating voltage of the cable or device being tested. - SORREGMANSWER!Hipoc cesters. test is a test that checks motor insulation over the life of the motor. - CORRECT ANSWER -An insulation spot test, Alow index indicates excessive moisture or contamination. - GORRECMANSWERI-Polarization. monitoring is the monitoring of equipment at specific time intervals. - CORRECT ANSWER - Scheduled monitoring. inspection is the simplest predictive maintenance procedure performed in a plant and requires no tools or equipment. GORRECTENSWER Visual and auditory. Lubricating oil analysis is performed on a basis. GORRECTANSWER! Scheduled. analysis focuses on the size, frequency, shape, and composition of particles produced from worn pects.» CORRECT ANSWER. Weer particle is the use of temperature-indicating devices to detect temperature changes in operating equipment. - CORRECHANSWERE Theemogeapiy. A thermal imager is a device that detects heat patterns in the -wavelength spectrum without making direct contact with equipment. - GORREGTANGWERI Infrared. Internal flaws or cracks in metal can be located using testers that consist of a transmitting and receiving uit, CORRECT ANSWER -Ulteasouic. r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al Manufacturer information is traditionally found in the manual, - CORRECT ANSWER. Operations and maintenance. A____ chart condenses lengthy word descriptions into a chart for easy problem solving. - - CORRECT ARSENE Fo». A(n) report isa record of a specific problem that occurs with a particular piece of equipment. - CORREGHANSIMERE roubeshocrng A_____ is filled out for each breakdown or equipment problem immediately after the problem is solved. - CORRECT ANSWER Troubleshooting resort ____ may be used by state and local authorities when dictating preventive maintenance requirements. - CORRECT ANSWER -Codes and standards. True or False: The public expects utility managers to protect the environment of their communities with a CORRECT ANSWER ns, minimum investment of money. True or False: Planning is one of the most important functions of utility management and one of the easiest. - CORRECT ANSWER ss. True or False: Operators should be asked to accept responsibilities for job tasks beyond their level of authority w promote employee yrowth, - CORRECT ANSWER False True or False: The selection method and examination process used co evaluate applicants must be limited to the applicant's knowledge, skills, and abilities to perform relevant job-related activities. CORRECT SNSWER Tc r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al What should be examined first by a utility planning to add personnel in response to changing conditions? - GORREGHANSWERE Examine how the existing workforce might be reorganized. What is the purpose of the job interview? - GORRECMANSWERI-To gain informacion so most qualified person can be selected, What is the best approach to solving a disciplinary problem? - CORRECT ANSWER. State the problem and ask the employee to suggest a solution. What is the purpose of accurate records? - GORRECIANS WER) Essential for effective utility management and to satisfy legal requirements. What is a pump? CORRECT ANSWER-A device that moves a fluid (liquids or gases), or sometimes slurries, by mechanical action, What does the verm arc length refer to in arc welding? - SGRIREGIGANSWER The distance from the end of the electrode to the surface of the work. When ARC (stick) welding in DC straight polarity welding, what should you consider with regards to the work and the electrode? - SORRIEGINAINSIVERIThe work is the positive pole and the electrode is the negative pole. What safety measure should be considered when chipping slag after stick welding? - SORRECIMANSWERI- Take precautions against flying debris. Is the tungsten electrode used in TIG welding a filler and/or consumed? - CORRECT ANSWER -It is a non- filler electrode and is non-consumable. r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al When MIG welding, what is the proper shielding gas to use for penetrating welds on steel? - CORRECT ANSWER Carbon Dioxide. When plasma cutting, what is an important environmental characteristic to consider? CORRECT ANSWERUse clean, dry air, What is che best description of a pressure head? - CORRECT ANSWER -The amount of energy in water due to water pressure, What is the source of most bearing failure? - GORRECTANSWER Some form of contamination entering the bearing. What is the most likely cause of a pump to quickly become noisy and vibratory CORRECT ANSWER - Cavitation in the pump. What is the most probable cause of an air compressor delivering below capacity: Broken or worn valves. What is the definition of friction, as it relates to machine components? - SORRECIANSWER The resistance of motion between two surfaces in contact. Would restriction of the discharge or the suction side of a centrifugal pump cause cavitation? AINSWWERE Restriction of the suction side piping. What can be assumed if a centrifugal pump sounds as if it is pumping rocks? - (ORRECIANSWERI-The pump is cavitating. GORRECIANS WER! Centrifugal pump. What style of pump always requires priming? r I I I I I I I I I I I I I I I I I I I I I I I I L a | During what condition would it be best to use an open or semi-open impeller pump? CORRECT ANSWER) During high volume, low head applications. Incernal leakage in a centrifugal pump with a closed impeller is restricted by what? - CGRRECIAINSWER- Wearing rings, The main function of a pump stuffing box is what? - GORRECIANSWER! Protect the pump against leakage at the point where the shaft passes through the pump casing. What is the most common type of AC motor used at a treatment plane? - CORRECT ANSWER-A squirrel- cage induction motor, Whar is rue about leakage when it comes to packing for pump sealing? - SORRECISSINGIWERE Ic should leak some amount continuously. How does the flow capacity of a pump vary with the speed of the pump? - SQRREGIANSWERL varies directly with the speed Q2/Q1 = N2/N1. Comminutor teeth should be set with how much clearance: The two major parts of a maintenance program are performing tasks and what? - CORRECT ANSWER- Scheduling tasks. GORREGTANSWR sicsions tha What circumstance would call for the use of pneumatic ejectors? require pumping low flows that contain large solids. Seal water is used for pumps that pump what? - CORRECT ANSWER. Liquids that contain grit. bua ee ee ee ee eee ee ee ee ee eee eee eee Ds ce eee ee ee es “1 I I I I I I I I I I I I I I I I I I I I I I I I al What is the typical operating efficiency in incline screw pumps? - GORRECHANSWERI75-80%. V-belts come in various letter designations ranging from A through E. What do these letter designations represent? - CORRECT ANSWER. The belts cross section dimensions. What is dry ice used for ata pump shop? - SORREGISANSWERI To freeze pump wear rings to ease installation, What is a good description of preventative maintenance used for plant equipment? - CORRECT ANSWER - Periodic inspection of facilities to discover developing defects that could lead to equipment failure. What does predictive maintenance ensure? GORRECTANSWERL Ensures less downtime than breakdown maintenance, What sort of valve manipulation can lead to water hammer in a piping system? Rapidly closing a valve. What cype of valve will open and close with only 1/4 ofa turn? - SORREGIANSIVERLA ball valve. What is the term for short pieces of pipe that are threaded on both sides? - GORRECTANSWER! Nipples. What is the term for a pipe with many connection points that allows for multiple flow operations? - CORREGHANSWERE Mitts. Which component must always be replaced when connecting a new chlorine cylinder? - CORRECT AINSWWER! Fiber washer r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al Whar tool trues, cleans, and shapes a grinding wheel? - CORRECT ANSWER-A wheel dresser. What is a thread chaser used for! ing damaged threads. What is the primary reason you should never lift or carry an electric hand tool, such as a drill, by its service cord? - CORRECT ANSWER ~The cord might be pulled off its terminals and become short circuited. Fluids can be moved through pipes raised co higher elevations, or stored under pressure through the use of h:e- CORRECTANSSTERE ns. Maintenance problems in pumping systems are usually caused by the pump, but also can be the result of improper wo Piping. CORRECT ANSWER ne What is the most common type of pumping system in industrial plants? system. If a large amount of hot water is required in one specific area, what sort of distribution system is the best choice? GORRECTANSWER Dead-end distribution system, In what sort of system is unused hot water reheated along with cooler incoming water? - GORRECH AINSWWER Recirculating system. Applications in which chemicals must be metered or pumped under high pressure require high-powered pumps, - CORRECT ANSWER Posisive displacement, Chemical handling arrangements are determined by the plant and the requirements of the particular ao GORRECTEANGWER Layout, appli r I I I I I I I I I I I I I I I I I I I I I I I I L “1 I I I I I I I I I I I I I I I I I I I I I I I I al Insulated piping systems are necessary for piping chemical products, ,and in an industrial plant, - CORRECTANSWER) Hot water, steam. When sump pumps are used, must be installed to keep large particles from reaching the pump impeller. - GORRECTANGWER Incake screens, Because spray booths require large quantities of water, what sort of system is best for such application? - High-viscosity materials are materials that resist what sort of force? - GORRECTANSWER! Flow- producing. What type of pump is typically used for pumping high-viscosity materials? - GORRECTANSWER) Positive displacement. In some cases, fluid is to lower its viscosity. - GORRECTANGWER Heated. Two problems encountered in paint pumping systems are the settling of and pigment CORRECT ANSWER. Pigments, abrasiveness. Systems handling greases, heavy mastics, cement, and concrete are called whar? - SORRECIANSWERI- Solids pumping systems. Repair of solids pumping is made easier if cylinder liners and other components are uscd.» CORRECT ANSWER. Replaccable, r I I I I I I I I I I I I I I I I I I I I I I I I L