Chapter 14 Burners for Boilers

Question 1

1. One of the main components of an electric ignition system is the:

A. Ignition cable

B. Step-up transformer

C. Oil nozzle

D. Nozzle barrel

E. Oil pump

Answer 1

B. Step-up transformer

Question 2

2.The highest oil level in the tank should be less than _____ above the burner.

A. 3.4 m (11.2 ft)

B. 7.6 m (24.9 ft)

C. 8.9 m (29.2 ft)

D. 12.6 m (41.3 ft)

E. 2.4 m (7.9 f

Answer 2

B. 7.6 m (24.9 ft)

Question 3

3.Atomizing Air (AA) is:

A. The air used to create a “sharing action on the fuel within the burner

B. Also called combustion air

C. The air used to ensure complete combustion

D. Also called secondary air

E. Also called tertiary air

Answer 3

A. The air used to create a “sharing action” on the fuel within the burner

Question 4

4.When the ‘‘control relay starts’’ the burner motor on demand for heat, it allows a purging cycle of _____ seconds then it energizes the igniter.

A. 15-20

B. 5-10

C. 5-15

D. 0-5

E. 10-15

Answer 4

E. 10-15

‘‘control relay starts’’

Question 5

5.The operation of a system with two or ‘‘three fixed capacity nozzles’’ is controlled by the operating pressure or temperature control on the boiler on an _____ cycle.

A. Air flow fuel flow

B. Modulating

C. Seam flow fuel flow

D. On-off

E. Low-high-Low

Answer 5

E. Low-high-Low

‘‘three fixed capacity nozzles’’

Question 6

6.The time-delay oil valve is adjusted to open automatically and allow oil flow to the burner from _____ seconds after the start of the igniter.

A. 5-15

B. 5-10

C. 15-20

D. 10-15

E. 0-5

Answer 6

D. 10-15

Question 7

7.A continuous pilot or standing pilot:

A. Burns at all times

B. Is automatically ignited

C. Is automatically ignited at the start of each burner operation and continues to burn throughout the main burner period

D. Is used to light off the main burner but does not burn throughout the burner period

E. Can act as the main burner

Answer 7

A. Burns at all times

Question 8

8.Secondary Air (SA) is:

A. The air used to create a “shearing” action on the fuel within the burner

B. Also called combustion air

C. The second air to contact the fuel when primary air is involved

D. Also called flue gas

E. Also called tertiary air

Answer 8

C. The second air to contact the fuel when primary air is involved

Question 9

9.Your Answer The second air to contact the fuel when primary air is involved

The air atomizing burner uses compressed air at about 100 kPa (15 psi) as atomizing air also called _____ air.

A. Secondary

B. Tertiary

C. Primary

D. Over fire

E. Combustion

Answer 9

C. Primary

Question 10

10.One class of oil burner is the _____ burner

A. Ring

B. Pre-mix

C. After mix

D. Refractory

E. Air or steam atomizing

Answer 10

E. Air or steam atomizing

Question 11

11.A gas burner may be classified as a _____ burner.

A. Premix

B. After mix

C. Ring

D. Spud

E. Power

Answer 11

E. Power

Question 12

12.An intermittent pilot:

A. Burns at all times

B. Is automatically ignited at the start of each burner operation and continues to burn throughout the main burner period

C. Is used to light off the main burner but does not burn throughout the burner period

D. Is manually ignited

E. Can act as the main burne

Answer 12

B. Is automatically ignited at the start of each burner operation and continues to burn throughout the main burner period

Question 13

13.The operation of a ‘‘single fixed capacity high-pressure’’ atomizing burner is controlled by the operating pressure or temperature control on the boiler on an _____ cycle.

A. Air flow fuel flow

B. Low-high-Low

C. Seam flow fuel flow

D. On-off

E. Modulating

Answer 13

D. On-off

Question 14

14.An important factor applicable to ‘‘automatic fuel valves’’ is:

A. Negative shutoff

B. Fast opening

C. Slow closing

D. Positive shutoff

E. Positive opening

Answer 14

D. Positive shutoff

Question 15

15.The ‘‘pump type motorized gas valve’’ uses a hydraulic oil pump to:

A. Close the gas valve quickly

B. Close the gas valve slowly

C. Open the gas valve slowly

D. Open the gas valve quickly

E. Lubricate the gas valve

Answer 15

C. Open the gas valve slowly

Question 16

16.Upon activation the two-way pilot valve in the diaphragm gas valve switches so that the:

A. Supply port closes and the bleed port opens

B. The supply pressure acting on top of the diaphragm forces it up

C. Supply port opens and the bleed port closes

D. The supply pressure acting on bottom of the diaphragm forces it up

E. Supply port opens and the bleed port open

Answer 16

A. Supply port closes and the bleed port opens

Question 17

17.An advantage of a refractory burner is:

A. Its higher cost

B. The gas and air mixture is not preheated before it enters the furnace

C. The metal burner parts are exposed to high temperatures

D. The short luminous flame spreads over a large cross-section of the furnace resulting in high radiant heat transfer

E. It is a more complex design

Answer 17

D. The short luminous flame spreads over a large cross-section of the furnace resulting in high radiant heat transfer

Question 18

18.The air atomizing burner uses compressed air at about 100 kPa (15 psi) as atomizing air also called _____ air.

A. Secondary

B. Tertiary

C. Primary

D. Over fire

E. Combustion

Answer 18

C. Primary

Question 19

19.The oil is supplied to the burner mechanical atomizing nozzle under high pressure of about:

A. 100 kPa (15 psi)

B. 200 kPa (29 psi)

C. 500 kPa (75 psi)

D. 700 kPa (100 psi)

E. 1000 KPa (145 psi)

Answer 19

D. 700 kPa (100 psi)

Question 20

20.One type of pilot burner is called the _____ pilot.

A. After mix

B. Premix

C. Continuous

D. Atmospheric

E. Power

Answer 20

C. Continuous

Question 21

21.Primary Air (PA) is:

A. The air used to create a “shearing” action on the fuel within the burner

B. The first air to make contact with the fuel

C. The air used to ensure complete combustion

D. Also called secondary air

E. Also called tertiary air

Answer 21

B. The first air to make contact with the fuel

Question 22

22.Upon activation the two-way pilot valve in the diaphragm gas valve switches so that the:

A. Supply port closes and the bleed port opens

B. The supply pressure acting on top of the diaphragm forces it up

C. Supply port opens and the bleed port closes

D. The supply pressure acting on bottom of the diaphragm forces it up

E. Supply port opens and the bleed port opens

Answer 22

E. Supply port opens and the bleed port opens