VEOLIA ES ISLIP

Instrumentation and Control Technician Exam

( 150 Questions )Applicants name_________________________________ Date:________ UNITS OF MEASURE

What are the typical units of measure for the following boiler parameters:

example: Temperature is measured in: Fahrenheit Steam flow: _____________________

Steam pressure: _____________________

Combustion air flow: ______________________

Baghouse differential pressure: ____________________

Opacity: ______________________

Carbon Monoxide: ________________________

Thermocouples: _________________________

RTDs: ___________________________

PRESSURE GAUGES & TRANSMITTERS

Most pressure transmitters all have a common output signal (regardless of brand). What is the range of the output signal commonly found on the connection to the control system?

What would the output signal on the pressure transmitter read if there was no pressure on the process connection (ma)?

What would the output signal on the pressure transmitter read if there was full pressure on the process connection (ma)?

When you connect a multimeter to the TEST connections on a pressure transmitter, what scale would you select on the multimeter?

What would the TEST signal read if the pressure transmitter had no pressure on the process connection?

What would the TEST signal read if the pressure transmitter had full pressure on the process connection?

If the needle on a pressure gauge was not pointing at 0 when there was no pressure on the system, how would you adjust the gauge to read 0?

What specialty tools and equipment would you need to check the span of a pressure gauge that was removed from the process?

What adjustments would you make to a pressure gauge if the span value was not reading currently?

If you had to order a pressure gauge for a system that normally operates at 100psi, what range would you select?

Atmospheric pressure is normally how many PSI?

What type of pressure gauge would you order if you had to measure the pressure drop across a filter?

What material type would you select if you had to order a pressure gauge for a process that had a slightly corrosive liquid?

What brands of pressure transmitters have you worked on?

What is HART?

What specially tools and equipment would you need if you were assigned to calibrate a pressure transmitter or pressure gauge?

What style of pressure gauge should be used on a process that constantly has erratic readings due to line pulses and vibrations that need to be dampened?

What is a U Tube manometer used to measure?

What type of pressure transmitter would you connect to an orifice plate

What type of pressure transmitter would you connect to a pitot tube?

How do you prevent parallax error when reading a pressure gauge?

POWERPLANT TERMINOLOGY

What is a combustor or grate?

What does a facilitys UPS provide?

What is a diesel generator typically used for?

What is a steam trap used for?

Name one type of condenser that is used to condense the steam coming out of a turbine generator

What does a boiler economizer do?

What does an SDA (spray drier absorber) do?

What does a baghouse do?

The fine particles of ash that travel within the flue gas stream are called what?

All powerplants have a fan at the base of the smoke stack that draws suction from the boiler train and blows the flue gas up the stack. What is this fan called?

Is boiler draft typically a positive or negative reading?

What is the purpose of a forced draft fan?

What does the abbreviation BFW stand for?

Is the switchgear a part of a motor driven gearbox, a diesel transmission, or neither

What are some common fuel types that are used on the main burners of a power boiler?

What is the purpose of a gun on a main burner?

If a power boiler burns coal or garbage, what piece of equipment sits at the very bottom level of the plant below the boiler?

What does the abbreviation CEMS stand for?

What are the terms lock-out and tag-out referring to?

POWERPLANT PROCESS READINGSIf you were asked to go take visual readings around the plant or in the control room, what readings would you typically expect to see on the following boiler parameters:

Steam flow of just one boiler: _____________________

Medium pressure steam pressure: _____________________

High pressure steam pressure: ________________________

High pressure steam temperature: _____________________

Combustion air flow into one zone: ______________________

Boiler temperature in the radiant or S/H sections: ________________________

Baghouse differential pressure on 1 compartment: ____________________

Opacity: ______________________

ELECTRICAL FORMULAS AND PRINCIPLES

What is the formula for Ohms Law?

What is the formula to calculate power (watts) in a circuit?

If you know the current and resistance, what is the formula to calculate voltage?

If you know voltage and resistance, what is the formula to calculate current?

How many amps does a 100w light bulb draw if the voltage is 100v

How would you abbreviate 100,000 ohms of resistance?

What are the schematic symbols for the following devices:

Battery: __________

A ground connection: __________

Fuse: __________

Transformer: __________

Single pole switch: __________

MOTOR TERMINOLGY AND TROUBLESHOOTING

What is the FLA rating of a motor?

What is the HP rating of a motor

What frequency do motors normally operate at in the United States?

What does it mean if you see 115 / 208 on a motor nameplate

What is a pecker head?

What type of motor would you order if it was going to be used in a wet location?

If a technician told you the motor had a phase imbalance, what did they find when they took some readings?

What does a Megger do?

What voltage would you set the Megger at if the motor was rated at 480vac?

If the Megger had a reading of infinite resistance, is the motor good or bad

What is the minimum megohm reading for a non-submersible motor to still be considered good?

_________ megohms

If you had to buzz out each set of windings on a motor rated at 200 HP or less, how many ohms would you expect to see on each winding if they were known to be good? (this question refers to the winding resistance, not insulation resistance)

_________ ohms

How many ohms would you expect to see between any of the motor windings and ground?

What type of motor has internal brushes?

If the motor current is running below the FLA, is the motor good or bad?

What does a VFD or VSD do for a motor?

What does L1 L2 and L3 typically refer to?

How do you change the direction of rotation on a 480vac motor?

What are the 3 most commonly used pieces of test equipment for troubleshooting motor problems?

SWITCHGEAR & MOTOR STARTERS NEMA-4 switchgear is suitable for what type of locations?

Where would you typically install a service disconnect?

What is the purpose of the switchgear buss bars?

What does the abbreviation MCC stand for?

What device lowers the voltage from 480vac to 115vac in a section of switchgear?

What does Racking out commonly refer to?

What voltage would you expect your multimeter to read if you were measuring across a 2-pole 115vac breaker

What voltage would you expect your multimeter to read if you were measuring between a single pole 115vac breaker and ground

What does GFCI stand for?

What is the purpose of a bonding wire?

What are the primary components found in a typical motor starter?

If you had to troubleshoot a 480vac motor starter, what voltage would you expect to read on the hot wire that goes to the start switch?

Besides the 3 primary fuses, what is the smaller fuse typically found in a 480vac motor starter used for?

Some 480vac motor starters use either a heater block or thermal relay. These devices are used to detect what type of condition?

What is a clamp on typically used to measure?

If you buzz out a bad coil on a relay, how many ohms would you expect to find?

What parts of a motor starter are considered to be a consumable and need to be replaced periodically?

ELECTRICAL CONSTRUCTION

What is the maximum current carrying capacity of the following wires:

_____ 10 awg

_____ 12 awg

_____ 14 awg

Which wire is larger?: 1 awg or 1 / 0

What is DIN rail used for?

What 3 wire colors are used on a typical 120vac circuit in a residence?

What 3 wire colors are used for the Hots on a typical 120 / 208vac 3-phase circuit?

What 3 wire colors are used for the Hots on a typical 480vac 3-phase circuit?

If the 3 primary conductors on a 480vac motor circuit are supposed to be at least 10awg, can the electrician use a slightly smaller conductor for the ground?

If you had to run conduit through a wet location, would you install rigid or EMT?

How would you determine how many conductors can safely fit inside a conduit?

What is cable tray used for?

What is the partition used for in a cable tray?

Where would you install a strain relief?

How would you determine which wire should be used if you know the amperage of the circuit?

Wire specifications THHN, THHW, and RHW are referring to what?

When would you use wire lubricant?

What is a bug nut used for?

What is Kindorf and Uni-Strut used for?

If you had to install a junction box outdoors, what is the preferred side for the conduit to enter the box (top, sides, or bottom)?

What is heat tracing used for?

TEMPERATURE DEVICES

Name 2 types of thermocouples:

Out of the 2 types named above, which one is rated for a higher temperature?

What color are the wires typically found on a 100 ohm platinum RTD?

What type of measuring device typically has a yellow wire and a red wire?

What pieces of test equipment are commonly used to troubleshoot a thermocouple and the associated circuit?

Is a thermowell required when installing a thermometer in a high pressure steam line?

CONTROL VALVES & SOLOIDS What does an I to P do?

Pneumatically actuated valves all need air pressure to control the stroke of the valve. What air pressure range is typically found on most common valves to control the stroke?

If you get a report that a pneumatically operated valve is not seating all the way, what simply test can you perform to see if the valve controller is at fault (without using any tools or test equipment) ?

What does the positioner do on a pneumatically actuated valve?

If you buzz out the coil on a solenoid valve and your multimeter suddenly beeps, is the coil probably good or bad?

DISTRIBUTED CONTROL SYSTEMS

What does I/O stand for?

What does PLC stand for?

What is a PID loop used for?

What type of input card does a pressure transmitter require?

What type of input card does a thermocouple require?

Name the 2 most common types of digital input cards

Name the 2 most common types of digital output cards?

What brands of PLCs are you proficient in programming?

When referring to a rung of ladder logic, which commands are grouped to the left, and which ones are grouped to the right?

Is the following output address displayed down to the bit level ( O:25/1 )?

If you were going to buy a really nice computer at a local retailer today, what specifications would you expect them to be offering (example: how much memory)?

What is the typical current range used on a low voltage control loop?

What type of non-contact input device is mounted on a conveyor for the DCS to see if the conveyor is turning?

If I wanted the DCS to ensure a conveyor was turning, would it be better to install the input device on the drive shaft or the take-up shaft?

Name the 2 most common methods of measuring the liquid level in a tank that uses a DCS to maintain the level?