Analyzes samples of air to determine amount of suspended foreign particles and effectiveness of control methods. Sets up, operates, and maintains laboratory instruments, makes observations, and calculates and records results.

Starts dust collector apparatus that draws air through machine and precipitates... [+] More

Analyzes samples of air to determine amount of suspended foreign particles and effectiveness of control methods. Sets up, operates, and maintains laboratory instruments, makes observations, and calculates and records results.

Starts dust collector apparatus that draws air through machine and precipitates dust on tubes, plates, electrodes, or in flasks. Weighs or otherwise determines amount of collected particles, such as lead, rock, or coal dust. Compares weight or count of particles with volume of air passed through machine, and computes percentage of concentration per cubic foot of air tested, using mathematical and chemical formulas. Prepares summary of findings for submission to appropriate department. May recommend remedial measures. [-] Less

Researches to identify... [+] More

Researches to identify and abate or eliminate sources of pollutants that affect people, wildlife, and their environments. Analyzes and documents measurements and observations of air, water, soil, and other sources to make recommendations on how best to clean and preserve the environment. Designs and evaluates waste disposal sites, preserves water supplies, and reclaims contaminated land and water. Excludes paraprofessional positions.

Plans and conducts environmental research studies to develop methods or theories of abating or controlling sources of environmental pollutants, utilizing knowledge of principles and concepts of various scientific and engineering disciplines. Requires advanced study in the field of research in environmental sciences. Determines data collection methods to be employed in research projects and surveys. Plans and develops research models, using knowledge of mathematical, statistical, and physical science concepts and approaches. Identifies and analyzes sources of pollution to determine their effects. Collects and synthesizes data derived from pollution emission measurements, atmospheric monitoring, meteorological and mineralogical information, and soil or water samples. Prepares graphs, charts, and statistical models from synthesized data, using knowledge of mathematical, statistical, and engineering analysis techniques. Analyzes data to assess pollution problems, establishes standards, and develops approaches for control of pollution. [-] Less

Analyzes samples of air to determine amount of suspended foreign particles and effectiveness of control methods. Sets up, operates, and maintains laboratory instruments, makes observations, and calculates and records results.

Starts dust collector apparatus that draws air through machine and precipitates... [+] More

Analyzes samples of air to determine amount of suspended foreign particles and effectiveness of control methods. Sets up, operates, and maintains laboratory instruments, makes observations, and calculates and records results.

Starts dust collector apparatus that draws air through machine and precipitates dust on tubes, plates, electrodes, or in flasks. Weighs or otherwise determines amount of collected particles, such as lead, rock, or coal dust. Compares weight or count of particles with volume of air passed through machine, and computes percentage of concentration per cubic foot of air tested, using mathematical and chemical formulas. Prepares summary of findings for submission to appropriate department. May recommend remedial measures. [-] Less

Coordinates movement of air traffic between altitude sectors and control centers to provide maximum separation and safety for aircraft. Maintains radio and telephone contact with air-traffic coordinators in adjoining control centers.

Relays information regarding air traffic by radio to tower and... [+] More

Coordinates movement of air traffic between altitude sectors and control centers to provide maximum separation and safety for aircraft. Maintains radio and telephone contact with air-traffic coordinators in adjoining control centers.

Relays information regarding air traffic by radio to tower and station, monitoring each sector, for transmittal to airplane pilots. Relays information, such as altitude, expected time of arrival, and course. Determines procedure and time for altitude changes to prevent collisions and excessive traffic buildup in flight sector. Completes daily activity report. [-] Less

Sells air transportation services for air commuter carriers, air cargo carriers, air passenger carriers, and/or helicopter carriers to new or existing customers in assigned area or territory. Creates prospect list and gets new accounts. Contacts and interacts directly with potential,... [+] More

Sells air transportation services for air commuter carriers, air cargo carriers, air passenger carriers, and/or helicopter carriers to new or existing customers in assigned area or territory. Creates prospect list and gets new accounts. Contacts and interacts directly with potential, new, and existing customers or clients to present information and explain available services offered, utilizing persuasive sales techniques.

Calculates and quotes prices. Answers all questions concerning air transportation services, with appropriate referrals where required. Analyzes and determines customers' air transportation needs, recommends service(s) best suited for them, and prepares and presents proposals to sell services that address those needs. Prepares forms or agreements, closes transactions, and secures sales. Establishes professional customer relationships with appropriate customer personnel. Submits time and expense reports to management. Investigates service warranty claims to ensure resolution within organization policies. Analyzes and interprets records of present and past sales, trends and costs, estimated and realized revenue, administrative commitments, and obligations incurred for management. Keeps informed of new services and changes that might affect services offered. Keeps informed of company contract procedures and service prices. May work with appropriate internal departments to obtain support and assistance in meeting customers' needs. [-] Less

Inspects, tests, adjusts, and balances heating, cooling, and ventilating systems in residential, commercial, and industrial buildings, using specialized tools and test equipment, to attain performance standards specified in system design

studies system blueprints, specifications, and performance data to determine configuration and... [+] More

Inspects, tests, adjusts, and balances heating, cooling, and ventilating systems in residential, commercial, and industrial buildings, using specialized tools and test equipment, to attain performance standards specified in system design

studies system blueprints, specifications, and performance data to determine configuration and purpose of system components, such as motors, pumps, fans, switches, ducts, or pipes. Discusses system malfunctions with users to isolate problems. Inspects system to verify system compliance with plans and specifications and to detect malfunctions in system component parts. Adjusts system controls to settings recommended by vendor to prepare to perform tests. Tests performance of air and hydronic systems, using specialized tools and test equipment, such as pitot tube, manometer, anemometer, velometer, tachometer, psychrometer, and thermometer, to isolate problems and determine where adjustments are necessary. Opens or closes louvers in system ductwork or adjusts flow control valves in piping to balance system, using handtools such as pliers, screwdriver, or wrenches. Discusses system operation with users to verify that malfunctions have been corrected. [-] Less

Repairs railroad-car air compressors and compressor motors, following wiring diagrams and using hand tools. Disassembles compressor and examines parts for wear or breakage. Cleans parts and installs new piston rings and wrist pins. Replaces worn bearings, armatures, field coils, gears,... [+] More

Repairs railroad-car air compressors and compressor motors, following wiring diagrams and using hand tools. Disassembles compressor and examines parts for wear or breakage. Cleans parts and installs new piston rings and wrist pins. Replaces worn bearings, armatures, field coils, gears, and pinions in electric motors, following wiring diagram. Reassembles compressor and connects compressor to compressed air and electrical outlets to test operation. [-] Less

Installs,... [+] More

Installs, services, and repairs window air conditioning units, ranging from one-half to three tons, in private residences and small establishments. Inspects existing wiring, fuses, or circuit breaker panels on customer's premises to ensure adequate power supply for operating air conditioner or heating unit. Measures window, transom, or other existing openings for air conditioning unit, using measuring tape or rule, or cuts opening through wall, using mallet and cold chisel. Assembles and positions support brackets in place, using screws, clamps, or other braces, and power tools and hand tools.

Fills space between window support and edge of opening with caulking compound and filler board. Places air conditioner on support frame and secures unit in position, leveling unit, using screws, clips, and bolts. Starts unit, adjusts controls, and listens for excessive noise or sounds indicating malfunction. Examines malfunctioning unit for defective parts, utilizing knowledge of mechanical, electrical, and refrigeration theory, to determine cause of malfunction. Dismantles whole or part of unit, as indicated by type of malfunction, and repairs or replaces such parts as switches, relays, fan motors, thermostats, and other components, using hand tools and power tools. Replaces filters, lubricates unit, and adjusts controls. Reassembles unit, making necessary adjustments to ensure efficient operation. May give instructions to customer regarding operation and care of unit. May estimate cost of repairs or adjustments. May remove unit from customer's premises for major repairs or overhaul in shop, or for return to manufacturer for extensive repairs. May repair sealed refrigeration units of machines. For installation, service, and repair of central air conditioning/heating units, see Heating/Air Conditioning Installer (Industrial). [-] Less

Installs,... [+] More

Installs, services, and repairs heating, ventilating, air conditioning systems, and related environmental-control systems utilizing knowledge of heating and refrigeration theory, pipefitting, and structural layout. Mounts compressor and condenser units on platform or floor, using hand tools, following blueprints or engineering specifications. Fabricates, assembles, and installs ductwork and chassis parts, using portable metalworking tools and welding equipment.

Installs evaporator unit in chassis or in air-duct system, using hand tools. Cuts and bends tubing to correct length and shape, using cutting and bending equipment and tools. Cuts and threads pipe, using machine-threading or hand-threading equipment. Joins tubing or pipes to various refrigerating units by means of sleeves, couplings, or unions, and solders joints, using torch, forming complete circuit for refrigerant. Installs expansion and discharge valves in circuit. Connects motors, compressors, temperature controls, humidity controls, and circulating-ventilation fans to control panels, and connects control panels to power source. Installs air and water filters in completed installation. Injects small amount of refrigerant into compressor to test systems, and adds Freon gas to build up prescribed operating pressure. Observes pressure and vacuum gauges and adjusts controls to ensure efficient operation. Tests joints and connections for gas leaks, using gauges or soap-and-water solution. Wraps pipes in insulation batting and secures them in place with cement or wire bands. Replaces defective breaker controls, thermostats, switches, fuses, and electrical wiring to repair installed units, using electrician's hand tools and test equipment. May install, repair, and service air conditioners, ranging from 15 to 20 tons of cooling capacity, in warehouses and factory buildings. [-] Less

Tends air compressors driven by steam, electric, or gasoline powered units, to generate and supply compressed air for operation of pneumatic tools, hoists, and air lances

starts power unit to build up specified pressure in compressor. Adjusts controls or sets automatic... [+] More

Tends air compressors driven by steam, electric, or gasoline powered units, to generate and supply compressed air for operation of pneumatic tools, hoists, and air lances

starts power unit to build up specified pressure in compressor. Adjusts controls or sets automatic controls to maintain continuous air supply to pneumatic tools or equipment. Observes temperature and pressure gauges and adjusts controls accordingly. Lubricates and cleans equipment. May connect pipelines from compressor to pneumatic tools or equipment. May repair low pressure steam boilers that furnish power for air compressor units by disassembling unit of boiler and replacing damaged parts, using handtools. May be designated according to type of equipment operated as air-compressor operator, stationary; compressor operator, portable. [-] Less