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Flashcards in Bulk plant theory and operations Deck (39)
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1

Which delivery principle is the air bulk material ratio constant throughout the line?

Steady dense flow

2

What is the purpose of bulk plant operation?

To allow moving of bulk materials
To provide opportunity for bulk storage at district and location.
To allow for dry blending

3

What affects the amount of material carried by the air?

Amount of air
Size and weight of the particles
size and length of piping between tanks
pressure in holding tank and receiving tank.

4

What is the bulk advantages over sacks?

Higher transfer rate
Reduced man power requirements for material transfer
minimal loss of material.

5

what are the 2 principles of flow delivery?

Plug Flow
Steady dense flow

6

What are the three types of air compressor?

Reciprocating
Vane type
Rotary Axial

7

What are the basic parts of a bulk system?

Dust control (up)
Pressure Bessel (tall)
Weight batch blender (cone)
Additive bottle (bellow the dust control)
Moisture control system (before compressor)
Pipping
Compressor

8

three types of moisture control system?

Water separator (slow down)
Air dryer (by absorption)
After cooler (compressor discharge)

9

what are the 2 types of dust control device filters?

Cloth sock filter (cloth material)
Pleated paper cartridge (cartridge)

10

What is the minimum amount required of cement as a sample?

25 lb and kept for 30 days or the end of the well.

11

what is the bulk load factor?

the ratio between the actual material loaded into a silo and the absolute volume of that silo.

12

Put the bulk loading calculations steps into correct order:
*Calculate the maximum number of sacks that will fit into each piece of equipment.
*Determine the total amount of materials needed.
*Calculate the number of batches, the number of sacks per batch, and the amount of materials per batch.
*Determine the batch size according to the capacity of the equipment used.
*Adjust the blend size to fit the truck tanks and truck weight limitations.
*Check existing inventory to be sure adequate amounts of all required materials are available at the time of blending.

1. Determine the total amount of materials needed.
2. Check existing inventory to be sure adequate amounts of all required materials are available at the time of blending.
3. Determine the batch size according to the capacity of the equipment used.
4. Calculate the maximum number of sacks that will fit into each piece of equipment.
5. Adjust the blend size to fit the truck tanks and truck weight limitations.
6. Calculate the number of batches, the number of sacks per batch, and the amount of materials per batch.

13

What should you use on bulk silos?
Suction or discharge hoses?

Discharge hoses

14

Which of the following may be used on piping of silos? standard caps or blanking caps?

blanking caps

15

Which of the following are guidelines of STD 15 and 25
-Tank must be full
-The entrance of tank must not be blocked
-Workers must wear all EPP
-Tank mus be empty
-A buddy system should always be used.

-The entrance of tank must not be blocked
-Workers must wear all EPP
-Tank mus be empty
-A buddy system should always be used.

16

According to Tech Directive 4-2, the WBB should not be loaded with more than ____% of its absolute volume to avoid losses of materials through the vent line.

75%

17

As compressed air flows though bulk material, it tends to compact the particles.

false

18

The amount of material carried by air depends on which of the following factors?

B. amount of compressed air
D. pressure inside the holding tank
E. size of piping between tanks
F. pressure inside the receiving tank

19

When conveying bulk material using unsteady dense plug flow, the delivery rate is controlled at the discharge end of the transport line.

false

20

Which of the following is true about the fill line on a pressure tank?

The opening of the line will be at the bottom of the tank.

21

On most Schlumberger pressure tanks, the pressure relief valves are designed to relieve at what pressure?

35 psi

22

The porous media used as aeration devices in pressure tanks are commonly made of high-density plastic.

false is made of canvas (lienzo)

23

Which aspects of coded pressure vessel construction does the ASME govern?

B. type of metal used for construction
C. welding procedures
D. testing procedures
E. use of approved welders and inspectors

24

Match each pressure vessel component with its description.
component
___ A.discharge line
___ B. pop-off
___ C. rupture disk
___ D. pipe jets
___ E. vacuum breaker
Description
1. an additional safety device
2. primary pressure relief safety device
3. starts as a hole in the middle-bottom of the tank
4. enables compressed air to aerate through cement
5. pressure system and additional safety device

3 A.discharge line
2 B. pop-off
1 C. rupture disk
4 D. pipe jets
5 E. vacuum breaker

25

Which of the following statements are true for both surge cans and gravity silos?
Select three correct answers.
A. They separate bulk material transport
from bulk material supply metering.
B. They allow air used to transport bulk
material to escape.
C. They provide a buffer when switching
from one P-tank to another.
D. They can be used as storage tanks for
bulk material on location.
E. They are considered code tanks.

A. They separate bulk material transport
from bulk material supply metering.
B. They allow air used to transport bulk
material to escape.
C. They provide a buffer when switching
from one P-tank to another.
D. They can be used as storage tanks for
bulk material on location.

26

The pressurized surge cans used by Schlumberger are equipped with a side
discharge.

true

27

Which of the following components on a reciprocating compressor is responsible for maintaining the desired pressure?

unloader

28

How is the ft3/min discharge of a rotary axial compressor regulated?

by throttling the intake valve

29

Match each type of compressor with its principle of operation.
Type
A. reciprocating
B. rotary axial
C. vane type

Principle of operation
1. Air is forced into a smaller diameter on the discharge end.
2. It acts like a blower.
3. It works like a two-cycle engine.

reciprocating
It works like a two-cycle engine.

rotary axial
Air is forced into a smaller diameter on the discharge end.

vane type
It acts like a blower.

30

Which of the following is risked by having a dirty air filter on a reciprocating compressor?

Oil could be carried to the pads in the bulk cement tank