Book 1: 4-14 "Burners for Boilers" Flashcards
One type of pilot burner is called the _____ pilot.
Select one:
A. Atmospheric
B. Premix
C. Power
D. Continuous
E. After mix
D. Continuous
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
A. Is automatically ignited at the start of each burner operation and continues to burn throughout the main burner period
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
D. 5-15
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
D. Primary
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
D. The second air to contact the fuel when primary air is involved
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
E. Supply port closes and the bleed port opens
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)
E. 7.6 m (24.9 ft)
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
B. External or internal gear
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
D. Air or steam atomizing
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
D. On-off
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
The correct answer is: 10-15
A gas burner may be classified as a _____ burner.
Select one:
A. After mix
B. Premix
C. Ring
D. Power
E. Spud
D. Power
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)
E. 95°C (203°F)
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
D. Positive shutoff
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
B. Step-up transformer
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
B. 3 500
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
E. Low-high-Low
One of the general classes of gas burner is the _____ burner.
Select one:
A. Ring
B. Power
C. Premix
D. Atmospheric
E. Spud
C. Premix
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
D. Open the gas valve slowly
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
D. The first air to make contact with the fuel
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
A. The short luminous flame spreads over a large cross-section of the furnace resulting in high radiant heat transfer
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
E. The air used to create a “shearing” action on the fuel within the burner
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
C. Burns at all times
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
D. All of the above
