Book 1: 4-14 "Burners for Boilers"

Question 1

One type of pilot burner is called the _____ pilot.
Select one:

A. Atmospheric

B. Premix

C. Power

D. Continuous

E. After mix

Answer 1

D. Continuous

Question 2

An intermittent pilot:
Select one:

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

B. Burns at all times

C. Can act as the main burner

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

E. Is manually ignited

Answer 2

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

Question 3

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.
Select one:

A. 5-10

B. 10-15

C. 15-20

D. 5-15

E. 0-5

Answer 3

D. 5-15

Question 4

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

A. Over fire

B. Combustion

C. Tertiary

D. Primary

E. Secondary

Answer 4

D. Primary

Question 5

Secondary Air (SA) is:
Select one:

A. Also called flue gas

B. Also called tertiary air

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

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

E. Also called combustion air

Answer 5

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

Question 6

Upon activation the two-way pilot valve in the diaphragm gas valve switches so that the:
Select one:

A. Supply port opens and the bleed port opens

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

C. Supply port opens and the bleed port closes

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

E. Supply port closes and the bleed port opens

Answer 6

E. Supply port closes and the bleed port opens

Question 7

The highest oil level in the tank should be less than _____ above the burner.
Select one:

A. 12.6 m (41.3 ft)

B. 3.4 m (11.2 ft)

C. 8.9 m (29.2 ft)

D. 2.4 m (7.9 ft)

E. 7.6 m (24.9 ft)

Answer 7

E. 7.6 m (24.9 ft)

Question 8

The most common type of rotary pump used for boiler fuel oil is the _____ pump.
Select one:

A. Centrifugal

B. External or internal gear

C. Piston

D. Rotary lobe

E. Diaphragm

Answer 8

B. External or internal gear

Question 9

One class of oil burner is the _____ burner
Select one:

A. Refractory

B. Pre-mix

C. After mix

D. Air or steam atomizing

E. Ring

Answer 9

D. Air or steam atomizing

Question 10

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.
Select one:

A. Low-high-Low

B. Seam flow fuel flow

C. Air flow fuel flow

D. On-off

E. Modulating

Answer 10

D. On-off

Question 11

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

A. 15-20

B. 10-15

C. 5-10

D. 0-5

E. 5-15

Answer 11

The correct answer is: 10-15

Question 12

A gas burner may be classified as a _____ burner.
Select one:

A. After mix

B. Premix

C. Ring

D. Power

E. Spud

Answer 12

D. Power

Question 13

Heavy oils must be heated to approximately _____ before they can be atomized.
Select one:

A. 50°C (122°F)

B. 165°C (329°F)

C. 100°C (212°F)

D. 125°C (257°F)

E. 95°C (203°F)

Answer 13

E. 95°C (203°F)

Question 14

An important factor applicable to automatic fuel valves is:
Select one:

A. Slow closing

B. Fast opening

C. Negative shutoff

D. Positive shutoff

E. Positive opening

Answer 14

D. Positive shutoff

Question 15

One of the main components of an electric ignition system is the:
Select one:

A. Ignition cable

B. Step-up transformer

C. Oil pump

D. Oil nozzle

E. Nozzle barrel

Answer 15

B. Step-up transformer

Question 16

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.
Select one:

A. Air flow fuel flow

B. On-off

C. Seam flow fuel flow

D. Modulating

E. Low-high-Low

Answer 16

E. Low-high-Low

Question 17

One of the general classes of gas burner is the _____ burner.
Select one:

A. Ring

B. Power

C. Premix

D. Atmospheric

E. Spud

Answer 17

C. Premix

Question 18

The pump type motorized gas valve uses a hydraulic oil pump to:
Select one:

A. Close the gas valve quickly

B. Open the gas valve quickly

C. Lubricate the gas valve

D. Open the gas valve slowly

E. Close the gas valve slowly

Answer 18

D. Open the gas valve slowly

Question 19

Primary Air (PA) is:
Select one:

A. The air used to ensure complete combustion

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

C. Also called tertiary air

D. The first air to make contact with the fuel

E. Also called secondary air

Answer 19

D. The first air to make contact with the fuel

Question 20

An advantage of a refractory burner is:
Select one:

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

B. It is a more complex design

C. Its higher cost

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

E. The metal burner parts are exposed to high temperatures

Answer 20

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

Question 21

Atomizing Air (AA) is:
Select one:

A. Also called combustion air

B. Also called secondary air

C. Also called tertiary air

D. The air used to ensure complete combustion

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

Answer 21

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

Question 22

A continuous pilot or standing pilot:
Select one:

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

B. Can act as the main burner

C. Burns at all times

D. Is automatically ignited

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

Answer 22

C. Burns at all times

Question 23

Which of the following are the most common types of valves used to allow the flow of gas to the burners of a heating boiler?
Select one:

A. Solenoid valve

B. None of the above

C. Diaphragm gas valve

D. All of the above

E. Motorized gas valve

Answer 23

D. All of the above

Question 24

CSA regulations require that the fuel oil storage tank should be at least _____ away from the furnace.
Select one:

A. 1.0 m (3.3 ft)

B. 3.0 m (9.8 ft)

C. 1.5 m (4.9 ft)

D. 0.6 m (2 ft)

E. 2.5 m (8.2 ft)

Answer 24

D. 0.6 m (2 ft)

Question 25

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

A. 100 kPa (15 psi)

B. 200 kPa (29 psi)

C. 500 kPa (75 psi)

D. 1000 KPa (145 psi)

E. 700 kPa (100 psi)

Answer 25

E. 700 kPa (100 psi)

Question 26

The diaphragm gas valve has a two-way pilot valve that:
Select one:

A. allows supply pressure gas to flow to the bottom of the diaphragm closing chamber and hold the main valve open

B. Allows supply pressure gas to flow to the bottom of the diaphragm closing chamber and hold the main valve closed

C. allows supply pressure gas to flow to the top of the diaphragm closing chamber and hold the main valve open

D. On shutdown opens a bleed port and closes an opening port

E. On shutdown closes a bleed port and opens a closing port

Answer 26

E. On shutdown closes a bleed port and opens a closing port

Question 27

A disadvantage of a refractory burner is:
Select one:

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

B. Its higher cost

C. The metal burner parts are exposed to high temperatures

D. It is a simple design

E. The gas and air mixture is thoroughly preheated before it enters the furnace

Answer 27

B. Its higher cost

Question 28

Solenoid valves used on gas and oil-fired boilers are what type of valve?
Select one:

A. Ball

B. Gate

C. Globe

D. Plug

E. Needle

Answer 28

C. Globe

Question 29

A ring burner is known as a/an _____ burner.
Select one:

A. Atmospheric

B. After mix

C. Spud

D. Power

E. Premix

Answer 29

B. After mix

Question 30

The rotary cup oil burner rotates at about _____ r/min.
Select one:

A. 1 500

B. 3 500

C. 3 000

D. 2 500

E. 3 000

Answer 30

B. 3 500