SECOND GRADE TEST QUESTIONS
BOILERS QUESTIONS &
ANSWERS(RATED A+)
What are the essential steps in putting on a cold boiler on line with other operating
boilers? - ANSWER1. Blow down gauge glass and water column.
2. Open vent on boiler drum.
3. Start the burner on a low manual fire.
4. Test flame scanner.
5. Test low water cut off.
6. When boiler builds pressure close the vent.
7. Open header drain valve and non-return valve drain.
8. Open equalizing line to warm header.
9. When boiler pressure is 80% of header pressure open header valve and close the
drain.
10. Unscrew the hand wheel on the non-return valve and close the drain.
11. When boiler pressure equalizes put controls in automatic.
Sketch a steam header valve arrangement. Draw boiler, non return valves with drains,
and header. - ANSWER
Name two low water cutoff tests and how often they should be tested? - ANSWER1.
Evaporation Test
2. Slow Drain Test
Test them yearly or during outage.
When should you bottom blow a boiler? What safety procedure must be followed when
bottom blowing a boiler? - ANSWERWhen starting up with a small amount of pressure
on the boiler, but only when the fire is out. Always be in control of the valve.
How is a steam gauge connected to a boiler? What are two requirements? -
ANSWERConnected to the steam space of a boiler by a siphon. It should be made of
copper or brass and the shutoff should be located near the gauge.
In the ASME code for boilers, what does stamp 'A' stand for? - ANSWERPower boiler
assemblies.
Why is welding preferred over riveting on a longitudinal joints? - ANSWERWelded
longitudinal joints are stronger than riveted joints, welding eliminates areas where
sludge can form.
Why are tube ends beaded over in a steam drum? - ANSWERTo make sure they get
completely drained and to prevent air from being expelled.
BOILERS QUESTIONS &
ANSWERS(RATED A+)
What are the essential steps in putting on a cold boiler on line with other operating
boilers? - ANSWER1. Blow down gauge glass and water column.
2. Open vent on boiler drum.
3. Start the burner on a low manual fire.
4. Test flame scanner.
5. Test low water cut off.
6. When boiler builds pressure close the vent.
7. Open header drain valve and non-return valve drain.
8. Open equalizing line to warm header.
9. When boiler pressure is 80% of header pressure open header valve and close the
drain.
10. Unscrew the hand wheel on the non-return valve and close the drain.
11. When boiler pressure equalizes put controls in automatic.
Sketch a steam header valve arrangement. Draw boiler, non return valves with drains,
and header. - ANSWER
Name two low water cutoff tests and how often they should be tested? - ANSWER1.
Evaporation Test
2. Slow Drain Test
Test them yearly or during outage.
When should you bottom blow a boiler? What safety procedure must be followed when
bottom blowing a boiler? - ANSWERWhen starting up with a small amount of pressure
on the boiler, but only when the fire is out. Always be in control of the valve.
How is a steam gauge connected to a boiler? What are two requirements? -
ANSWERConnected to the steam space of a boiler by a siphon. It should be made of
copper or brass and the shutoff should be located near the gauge.
In the ASME code for boilers, what does stamp 'A' stand for? - ANSWERPower boiler
assemblies.
Why is welding preferred over riveting on a longitudinal joints? - ANSWERWelded
longitudinal joints are stronger than riveted joints, welding eliminates areas where
sludge can form.
Why are tube ends beaded over in a steam drum? - ANSWERTo make sure they get
completely drained and to prevent air from being expelled.
