Reciprocating Compressor Fundamentals Assignment

Question 1

What are 2 positive displacement compressors?

Answer 1

Sliding Vane
Reciprocating

Question 2

True or False;
Multi-staging means gas is compressed to the final pressure in 2 or more steps.

Answer 2

True

Question 3

What causes compressor valves to open and close?

Answer 3

Pressure Differential

Question 4

What is the purpose of suction valve unloaders?

Answer 4

To reduce compressor output

Question 5

True or False;
Single acting compressors are typically more efficient than double acting.

Answer 5

False

Question 6

What is the function of the crosshead and crosshead guides?

Answer 6

Keep the piston and the rod running true through the packing

Question 7

What is the minimum number of cylinders required for a multi-stage compressor?

Answer 7

2

Question 8

You can have multiple cylinders on a single stage compressor.

Answer 8

True

Question 9

What is the purpose of an intercooler?

Answer 9

To increase efficiency

Question 10

How many compression strokes are generated per revolution of the crankshaft on a double acting compressor?

Answer 10

2

Question 11

What three components are required on air receivers according to Alberta Boiler Safety Association regulations?

Answer 11

Pressure Gauge
Relief Valve
Drain

Question 12

What is the space between the piston and cylinder head at the end of the stroke called?

Answer 12

Clearance Volume

Question 13

What is the purpose of a clearance pocket?

Answer 13

To decrease compressor output

Question 14

Why is rod reversal necessary?

Answer 14

Allow oil to flood the crosshead pin

Question 15

What flow is most efficient?

Answer 15

Laminar Flow

Question 16

What are two functions of an air receiver?

Answer 16

1. Dampen Pulsations
2. Collect or help separate liquid from gas

Question 17

True or False;
After coolers are used to condense and remove moisture.

Answer 17

True

Question 18

True or False;
A double acting piston is connected directly to the connecting rod.

Answer 18

False;

crosshead

Question 19

If there is any possibility of a blockage in a compressed air system, what must be installed on the pressure side?

Answer 19

Safety Relief Valve