Boiler Controls

Question 1

what is the minimum size for blowdown piping?

Answer 1

3/4’’

Question 2

Can both LWCO and Aux LWCO be installed with a common pipe?

Answer 2

NO. They have to be piped separately.

Question 3

Can both LWCO controls be installed on the same water level.

Answer 3

No, One has to lower than the other.

Question 4

What is the minimum height for the LWCO cut installation?

Answer 4

They have to installed above the highest tubes.

Question 5

What is the maximum pressure rating for the float type LWCO controls?

Answer 5

150 PSIG

Question 6

Can both LWCO controls share the stream line piping?

Answer 6

yes

Question 7

Which plug are recommended for steam piping?

Answer 7

Bull plug

Question 8

Can shut-off be installed in the piping of LWCO

Answer 8

NEVER.

Question 9

Which is of automatic and manual reset type : of LWCO and Aux LWCO

Answer 9

LWCO= Automatic reset type
Aux LWC= Manual reset type.

Question 10

In which circuit the LWCO controls are wired?

Answer 10

The safety circuit.

Question 11

What type of fittings are to be used for boiler blowdown piping?

Answer 11

cross - for inspection

Question 12

To protect against a low water condition how many fuel cutoff devices are required on an automatically fired steam boiler?

Answer 12

2

Question 13

Beside shutting off the burner, what is another function of a low water cut-off device on a steam boiler?

Answer 13

Energize feed pump

Question 14

What is done to change the operating level of an external float style LWCO device

Answer 14

Change the installation piping

Question 15

What is the purpose of a steam trap?

Answer 15

It prevents steam from entering the condensate return piping

Question 16

At what point does the thermostatic steam trap open?

Answer 16

When the condensate temperature drops below saturated steam temperature

Question 17

What does the thermodynamic steam trap operate on the basis of?

Answer 17

Bernoulli’s principle

Question 18

The thermodynamic steam trap will work on lower pressure systems.

TRUE / FALSE

Answer 18

FALSE