chapter 14 Flashcards
Should an SSOV open wide quickly, a _________________ could result.
a)Over-pressure
b)Furnace puff-back
c)Over-temperature
d)Low water condition
b
The spark electrodes that ignites the burner pilot are typically:
a)10,000 - 12,000 V
b)10,000 - 12,000 A
c)120 V
d) 24 V
a
The type of burner commonly used on packaged boilers is:
a) Barometric burner
b) Ring burner
c) Venturi burner
d) Aspirating burner
b
The main function of a burner is:
a)Ensure mixing of fuel and air
b)Ensure proper furnace pressure
c)Ensure design flue gas temperature
d)Provide draft
a
The most common type of pump used to deliver oil to an oil burner is:
a)Diaphragm
b)Rotary gear
c) Centrifugal
d)Vane
b
On a premix burner, the air provided for complete combustion is called:
a)Premix
b)Theoretical
c)Secondary
d)Primary
c
In a premix burner, the action of drawing air into the burner is termed:
a)Orifice facing
b)Aspirating
c)Pressure
d)Inducing
b
The atomizing air used on a package boiler is delivered at:
a)690 kPa / 100 psi
b)30C / 86F
c)345 kPa / 50 psi
d)103 kPa / 15 psi
d
An intermittent pilot
a) Burns only until the main gas valve is proven
b) Burns continuously even when the main gas valve is de-energized
c) Burns the entire time the main gas valve is energized
d) Is no longer allowed for use on boiler burners
A
In the rotary cup oil atomizing burner, oil is pumped to the inside of a cup that is being rotated:
a)At about 1500 rpm
B)On an eccentric shaft
c)At about 3500 rpm
d)At about 100 rpm
c
Gas burners differ mainly in the way air and fuel mix. The two general classes are:
a) Diffuser and atomizing
b) Atmospheric and primary
c) Power and primary
d) Premix and after-mix
d
An intermittent pilot
a) Burns the entire time the main gas valve is energized
b) Is no longer allowed for use on boiler burners
c) Burns only until the main gas valve is proven
d) Burns continuously even when the main gas valve is de-energized
a
In the rotary cup oil atomizing burner, oil is pumped to the inside of a cup that is being rotated:
a) At about 1500 rpm
b) On an eccentric shaft
c) At about 100 rpm
d) At about 3500 rpm
d
Should an SSOV open wide quickly, a _________________ could result.
a) Over-pressure
b) Furnace puff-back
c) Low water condition
d) Over-temperature
b
The type of oil burner that forces oil through a very fine nozzle port is a _____________ atomizing burner.
a) Steam
b) Rotary cup
c) Centrifugal
d) Mechanical
d
Air that is used to vaporize the fuel for easier burning is called _______ air.
a. secondary
b. primary
c. atmospheric
d. atomizing
d
gas burners that are commonly found on hot water heaters are _________
a. power
b. atmospheric
c. primary
d. secondary
b
the type of pilot burner that is automatically ignited at the start of each burner operation and continues to burn throughout the main burner “on” period is called the _________________ pilot
a. continuous
b. interupted
c. standing
d. intermittent
d
a type of valve used as a shut-off valve in pilot and main burner supply lines that uses an electromagnetic coil to activate it is a_________valve
a. check
b. globe
c. motorized
d. solenoid
d
before light oil can be burned properly it must be ________
a. heated
b. pasturized
c. switled
d. atomized
d
the type of oil burner that forces the oil through a very fine nozzle port is a _________ burner
a. rotary cup
b. mechanical
c. steam atomizing
d. centrifugal
b
the result of an automatic gas valve opening too quickly is called a _________
a. light-off
b. boiler explosion
c. pressure explosion
d. puff back
d
heavy oil must be heated to approximately _________ before they can be atomized
a. 95 c
b. 59 c
c. 125 c
d. 165 c
a
an oil storage tank must be located at least _______ away from the furnace
a. 1m (3.3 ft)
b. 1.5m (4.9 ft)
c. 0.6m (2 ft)
d.3m (9.8 ft)
c
Heavy oils must be heated to approximately _____ before they can be atomized.
A.95°C (203°F)
B.50°C (122°F)
C.165°C (329°F)
D.100°C (212°F)
E.125°C (257°F)
a
Upon activation the two-way pilot valve in the diaphragm gas valve switches so that the:
A.The supply pressure acting on top of the diaphragm forces it up
B.Supply port opens and the bleed port opens
C.Supply port closes and the bleed port opens
D.The supply pressure acting on bottom of the diaphragm forces it up
E.Supply port opens and the bleed port closes
c
Solenoid valves used on gas and oil-fired boilers are what type of valve?
A.Globe
B.Needle
C.Ball
D.Plug
E.Gate
a
An advantage of a refractory burner is:
A.The metal burner parts are exposed to high temperatures
B.Its higher cost
C.The gas and air mixture is not preheated before it enters the furnace
D.It is a more complex design
E.The short luminous flame spreads over a large cross-section of the furnace resulting in high radiant heat transfer
e
The rotary cup oil burner rotates at about _____ r/min.
A.1 500
B.3 000
C.2 500
D.3 000
E.3 500
e
Atomizing Air (AA) is:
A.The air used to create a “shearing” action on the fuel within the burner
B.Also called combustion air
C.Also called secondary air
D.The air used to ensure complete combustion
E.Also called tertiary air
a
An intermittent pilot:
A.Burns at all times
B.Is manually ignited
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 automatically ignited at the start of each burner operation and continues to burn throughout the main burner period
e
One class of oil burner is the _____ burner
A.Ring
B.After mix
C.Pre-mix
D.Refractory
E.Air or steam atomizing
e
CSA regulations require that the fuel oil storage tank should be at least _____ away from the furnace.
A.0.6 m (2 ft)
B.1.0 m (3.3 ft)
C.1.5 m (4.9 ft)
D.3.0 m (9.8 ft)
E.2.5 m (8.2 ft)
a
The highest oil level in the tank should be less than _____ above the burner.
A.3.4 m (11.2 ft)
B.12.6 m (41.3 ft)
C.8.9 m (29.2 ft)
D.7.6 m (24.9 ft)
E.2.4 m (7.9 ft)
d
