CMPR 6007_Gas Compression - Compressor Components 5 page

A - double-flow
B - front-to-back
C - side-by-side
D - back-to-back

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

Question 1:

Large, multi-stage gas compressors are usually configured in a _______________ arrangement to aid in balancing residual axial thrust forces.

A - side-by-side
B - front-to-back
C - double-flow
D - back-to-back

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 2:

The vertical separator is chosen for process applications where:

A - The gas/liquid ratio is low or where total gas volumes are high
B - The gas/liquid ratio is low or where total gas volumes are low
C - The gas/liquid ratio is high or where total gas volumes are low
D - Large volumes of total fluids containing large amounts of dissolved gases are present

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 3:

Which of the following is not a result of cooling the gas with an intercooler and/or aftercooler:

A - Increased the amount of power required to compress the gas
B - Removal of water and oil vapours from the gas stream
C - More effective cylinder lubrication
D - Reduces weakening of parts due to high temperatures

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

_______________________________________________

Question 4:

The major section of the separator vessel labeled "A" in the diagram below is referred to as the:

A - Primary separation section
B - Sump (liquid collection) section
C - Secondary or gravity section
D - Coalescing section

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

_______________________________________________

Question 5:

The major section of the separator vessel labeled "C" in the diagram below is referred to as the:

A - Primary separation section
B - Secondary or gravity section
C - Sump (liquid collection) section
D - Coalescing section

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 6:

Because their configuration provides a __________________ the use of horizontal separators allows for optimal release of trapped gas.

A - reduced surface area
B - superior control of process temperatures
C - greater surface area
D - greater degree of level control

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 7:

The inlet nozzle in the primary section of separator vessels is designed to take advantage of the effects of the:

A - Centrifugal force of the discharge stream
B - Gravitational forces within the compartment
C - Centripetal force of the inlet stream
D - Centrifugal force of the inlet stream

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 8:

In separator vessels, regardless of shape or capacity, the secondary section uses:

A - A pad made up of knitted wire mesh, or a series of cyclonic passages
B - A sump to collect all liquids removed from the gas
C - The effects of the centrifugal force of the inlet stream to separate liquids from the gas
D - The force of gravity to help separate entrained droplets of liquid from the stream

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 9:

The heat exchanger on the discharge of the compressor following the completion of compression is called the:

A - Vortex breaker
B - Aftercooler
C - Intercooler
D - Hot mist extractor

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 10:

Side-stream compressors are popular in process gas streams or flows from economizers in refrigeration compression. These compressors are _____________ centrifugal compressors.

A - four-stage
B - single-stage
C - reciprocating
D - two-stage

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

Question 1:

In a vertical separator, where the gas line enters the scrubber, the baffle plate serves to:

A - Increase the velocity of the gas by changing its direction
B - Protect the side of the scrubber from corrosion
C - Reduce the pressure of the gas when it enters the scrubber
D - Direct the gas into a swirling motion causing entrained liquids to drop out

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 2:

The major section of the separator vessel labeled "C" in the diagram below is referred to as the:

A - Sump (liquid collection) section
B - Secondary or gravity section
C - Coalescing section
D - Primary separation section

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 3:

The vertical separator is chosen for process applications where:

A - Large volumes of total fluids containing large amounts of dissolved gases are present
B - The gas/liquid ratio is high or where total gas volumes are low
C - The gas/liquid ratio is low or where total gas volumes are high
D - The gas/liquid ratio is low or where total gas volumes are low

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 4:

An aftercooler on a reciprocating compressor:

A - Reduces the level of liquids in the scrubber by operating the dump valve
B - Increases the weakening of parts due to high temperatures
C - Increases the possibility of explosions of oil vapour mixed with air
D - Condenses both oil and water from the compressed gas

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 5:

In separator vessels, regardless of shape or capacity, the secondary section uses:

A - The force of gravity to help separate entrained droplets of liquid from the stream
B - A pad made up of knitted wire mesh, or a series of cyclonic passages
C - A sump to collect all liquids removed from the gas
D - The effects of the centrifugal force of the inlet stream to separate liquids from the gas

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

_______________________________________________

Question 6:

Intercooling involves:

A - Cooling the gas following the completion of compression
B - Cooling the gas by water injection
C - Cooling the gas between stages of compression
D - Cooling the gas before compression

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 7:

The large surface area provided within a horizontal separator allows for:

A - Ease of liquid level control
B - Lower equipment cost when compared to vertical separators
C - Optimum retention of trapped gas
D - Optimum release of trapped gas

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 8:

Large, multi-stage gas compressors are usually configured in a _______________ arrangement to aid in balancing residual axial thrust forces.

A - double-flow
B - front-to-back
C - side-by-side
D - back-to-back

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 9:

To reduce the gas temperature between states of a gas compressor a/an ___________ is utilized.

A - mist extractor
B - separator
C - aftercooler
D - intercooler

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 10:

Provided there is no shut-off valve between an aftercooler and an air receiver, a safety valve on the aftercooler is unnecessary.

A - True
B - False

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

Question 1:

Before disconnecting piping under cathodic protection, it is important to shut off the cathodic protection or install a jumper across the intended gap. In most plants, the disturbing of cathodic protection requires a:

A - Backhoe
B - Plant shutdown
C - Hot Work permit
D - All of the above

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 2:

Cathodic protection is the use of indirect current from an external source to oppose the discharge of corrosion current from cathodic areas of a metal structure immersed in a conducting medium or electrolyte such as soil and water.

A - True
B - False

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 3:

Cooling water systems are excellent areas for corrosion to take place. All of the following are factors that contribute to corrosion in cooling water systems except:

A - A drop in pH to low levels
B - High and low temperatures
C - An oxygen-saturated system
D - The absence of dissolved solids in the raw water makeup

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 4:

Sacrificial anodes are made of materials like:

A - Zinc or magnesium
B - Copper or aluminum
C - Graphite or titanium
D - Nickel or chromium

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

_______________________________________________

Question 5:

Based on the galvanic series chart shown, which combinations of metals listed would have the least tendency for galvanic corrosion when joined?

A - Steel and magnesium
B - Nickel and Monel
C - Nickel and zinc
D - Gold and tin

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 6:

Cathodic protection current must be:

A - Indirect current
B - Direct current
C - Alternating current
D - Stray current

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 7:

Which of the following metals is found the highest on the galvanic series chart?

A - Zinc
B - Copper
C - Steel
D - Nickel

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 8:

A standard treatment for inhibiting caustic embrittlement in boilers is:

A - Sodium phosphate
B - Sodium hydroxide
C - Sodium nitrate
D - Sodium chloride

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 9:

Acidic water is commonly neutralized with:

A - Amines and nitrates
B - Chlorides or sulphates
C - Lime and soda ash
D - Magnesium or gypsum

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 10:

There is one type of corrosion that is most responsible for destructive explosions involving boilers. What is it?

A - Pitting
B - Caustic corrosion
C - Caustic embrittlement
D - Hydrogen damage

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

Question 1:

There is one type of corrosion that is most responsible for destructive explosions involving boilers. What is it?

A - Caustic corrosion
B - Caustic embrittlement
C - Pitting
D - Hydrogen damage

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 2:

Pitting failure can occur anywhere in the boiler, particularly in economizers, superheaters, reheaters, and the nonheated portions of water wall tubes. One of the methods used to control pitting in boilers is to:

A - Blanket the boiler with oxygen during shutdown periods
B - Keep the boiler full of chemically treated water
C - Ensure that the deaerator is operated to effectively add oxygen to the feed water
D - Eliminate the residual of oxygen scavenger chemicals in the boiler water

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 3:

Cathodic protection is the use of indirect current from an external source to oppose the discharge of corrosion current from cathodic areas of a metal structure immersed in a conducting medium or electrolyte such as soil and water.

A - True
B - False

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 4:

Pitting in boiler metal is caused by:

A - Carbon dioxide
B - Chlorides
C - Oxygen
D - Ammonia

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 5:

Based on the galvanic series chart shown, which combinations of metals listed would have the least tendency for galvanic corrosion when joined?

A - Gold and tin
B - Nickel and Monel
C - Nickel and zinc
D - Steel and magnesium

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 6:

Acidic water is commonly neutralized with:

A - Amines and nitrates
B - Lime and soda ash
C - Chlorides or sulphates
D - Magnesium or gypsum

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 7:

Impressed current systems are commonly used where large currents are required. Direct current is discharged through one or more anodes into the:

A - Thermoelectric generators
B - Electrolyte
C - Low resistance backfill
D - Structure requiring protection

Correctness Rule: Single Correct Answer Required

Correct Answer(s): D
Marked as: Incorrect

_______________________________________________

Question 8:

Sacrificial anodes are made of materials like:

A - Zinc or magnesium
B - Nickel or chromium
C - Copper or aluminum
D - Graphite or titanium

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

_______________________________________________

Question 9:

Cathodic protection current must be:

A - Stray current
B - Direct current
C - Alternating current
D - Indirect current

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 10:

Of the following, which is NOT a typical application of galvanic anodes?

A - External protection of vessels that are partly filled with water
B - Protection of short, well-coated buried pipelines
C - Hot spot (small areas of high corrosion) protection on bare buried pipelines.
D - Internal protection of vessels that are partly filled with water

Correctness Rule: Single Correct Answer Required

Correct Answer(s): A
Marked as: Incorrect

Question 1:

Passivating inhibitors function by:

A - Being added to a system to neutralize acids
B - Being electrodeposited onto mechanical parts
C - Forming precipitates on cathodic areas, which slow down the corrosion reactions
D - Causing the metal to corrode, creating a protective oxide film

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 2:

Cathodic protection can only be applied to the surface of the metal exposed to the:

A - Anodic areas of the structure
B - Same electrolyte as the anode
C - External current running through the vessel
D - All of the above

Correct Answer(s): B
Marked as: Incorrect

_______________________________________________

Question 3:

Cathodic protection current must be:

A - Direct current
B - Stray current
C - Alternating current
D - Indirect current

Correctness Rule: Single Correct Answer Required

Answer(s) Given: A
Correct Answer(s): A
Marked as: Correct

_______________________________________________

Question 4:

The most common source of current for an impressed current system is a rectifier, which transforms

A - AC into DC
B - Alternating current into AC
C - AC into indirect current
D - DC into AC

Correctness Rule: Single Correct Answer Required

Correct Answer(s): A
Marked as: Incorrect

_______________________________________________

Question 5:

Cathodic protection is the use of indirect current from an external source to oppose the discharge of corrosion current from cathodic areas of a metal structure immersed in a conducting medium or electrolyte such as soil and water.

A - True
B - False

Correctness Rule: Single Correct Answer Required

Answer(s) Given: B
Correct Answer(s): B
Marked as: Correct

_______________________________________________

Question 6:

Which of the following metals is found the highest on the galvanic series chart?

A - Zinc
B - Steel
C - Copper
D - Nickel

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 7:

Cooling water systems are excellent areas for corrosion to take place. All of the following are factors that contribute to corrosion in cooling water systems except:

A - High and low temperatures
B - An oxygen-saturated system
C - A drop in pH to low levels
D - The absence of dissolved solids in the raw water makeup

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 8:

Before disconnecting piping under cathodic protection, it is important to shut off the cathodic protection or install a jumper across the intended gap. In most plants, the disturbing of cathodic protection requires a:

A - Backhoe
B - Plant shutdown
C - Hot Work permit
D - All of the above

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C
Marked as: Correct

_______________________________________________

Question 9:

Based on the chart shown here, which of the combinations of metals listed would have the greatest tendency for galvanic corrosion when joined?

A - Aluminum bronze and tin
B - Titanium and copper
C - Nickel and zinc
D - Nickel and monel

Correctness Rule: Single Correct Answer Required

Answer(s) Given: C
Correct Answer(s): C

Question 10:

Impressed current systems are commonly used where large currents are required. Direct current is discharged through one or more anodes into the:

A - Thermoelectric generators
B - Electrolyte
C - Low resistance backfill
D - Structure requiring protection

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

Question 1:

Impressed current systems are commonly used where large currents are required. Direct current is discharged through one or more anodes into the:

A - Low resistance backfill
B - Thermoelectric generators
C - Electrolyte
D - Structure requiring protection

Correctness Rule: Single Correct Answer Required

Answer(s) Given: D
Correct Answer(s): D
Marked as: Correct

_______________________________________________

Question 2:

Caustic corrosion (caustic gouging) takes place where corrosion products are deposited and is usually found in ______________ areas of the boiler.

Date: 2015-12-11; view: 751