chapter 6 Flashcards
Only 1 wrong
What term describes a series of tanks and vessels that are interconnected in a system for storing feedstock, intermediates, additives, and final products?
super refinery
tank farm
warehouse
answer B
What is the term used to describe products that are sold to the customer and are not processed further?
independent product
crude oil
answer A
Gasoline is an example of what type of product?
blended product
raw material
answer A
Which of the following is an advantage of aboveground tanks?
Provides a more-pleasing landscape
Easy access for maintenance and repair
answer B
Which of the following is a disadvantage of underground tanks?
Harder to recognize leaks
More vulnerable to damage
answer A
Pressurized spherical tanks are often used to store what types of product?
Products with pressure slightly greater than atmospheric pressure
Products with a high vapor pressure
answer B
How does the surface area of the solid or liquid in contact with a gas affect vapor pressure?
Vapor pressure decreases as the surface area increases.
Surface area has no effect.
answer B
As the liquid level rises inside a tank that uses an inert gas blanketing system, inert gas is vented through a process sometimes called ________.
Unpadding
Depadding
answer B
In addition to high/low level, temperature, and pressure, what other condition will typical storage tanks for continuous operation blending systems have alarms for?
Blanket system failure
Blending imbalances
answer A
Pressure/vacuum relief valves (PVRVs) help protect tanks against what form of permanent damage due to vacuum?
Implosion
overheating
answer A
What kind of control uses both a nitrogen valve and a vent valve to control pressure?
A bilateral control
A split range control
answer B
What can cause the product to become too viscous and inhibit or stop transfer by clogging lines and pumps, which may damage them beyond repair?
Insufficient heating in the temperature control system
Insufficient cooling in the temperature control system
answer A
What can result in rupture of the rupture disc, venting dangerous gases to the atmosphere, and in extreme cases, a tank rupture?
Insufficient cooling in the temperature control system
PVRV failure in the pressure measurement and control system
answer B
Which area of responsibility in storage and blending systems requires the process technician to purge equipment?
Monitoring conditions of the system
Starting up the storage blending system
answer B
Which operator task can pose chemical contact/inhalation hazards?
monitoring outside equipment
cleaning vessels
answer B
In performing the task of preparing for maintenance, why is it important to steam, wash, or purge equipment?
To ensure all hydrocarbons are removed before any air is admitted to the system
To avoid slips and falls
answer A
Which type of blending adds materials successively (in turn, one after the other) then mixes them all together?
Batch or tank blending
Continuous or inline blending
answer A
Which type of blending does not require an additional mixing vessel?
Batch or tank blending
Continuous or inline blending
answer B
