Lots of Boiler Drawings Flashcards
The appropriate steam trap (first choice) for the ends of horizontal LP mains would be a(n):
1)
disc-type thermodynamic
2)
impulse thermodynamic
3)
inverted bucket trap
4)
F & T
4)
F & T
A steam trap discharging to an overhead main should be piped:
1)
so the condensate is fed back into the top of the overhead return line
2)
so the condensate is fed back into the bottom of the overhead return line
3)
without a check valve, to reduce backpressure against the trap
4)
one pipe size larger than normal to prevent flashing of the condensate
1)
so the condensate is fed back into the top of the overhead return line
The most critical section of the ASME code for pressure piping is:
1)
B31.1
2)
B31.2
3)
B31.3
4)
B31.4
5)
B31.11
1)
B31.1
Monel is a high strength:
1)
stainless steel and titanium alloy
2)
bronze and aluminum alloy
3)
nickel and cadmium alloy
4)
nickel and copper alloy
nickel and copper alloy
Which piping material is especially favoured in the food industry where contamination and discoloration of materials being processed must be avoided?
1)
nickel
2)
copper
3)
Monel
4)
Cr-Ni-Mo
1)
nickel
Standards and codes provide ________________ requirements for materials, dimensions, design, erection, testing, and inspection:
1)
maximum
2)
Incorrect Response
3)
average
4)
no
2)
minimum
The formula for calculating the stretchout for a circular job is:
1)
diameter2
x .7854
2)
diameter2
x 3.1416
3)
diameter x .7854
4)
diameter x 3.1416
5)
diameter x height x 1.414
4)
diameter x 3.1416
A branch line is to be fitted to a return header. Which of the following configurations would tend to oppose the flow the least?
1)
a 45o
lateral
2)
a 30o
lateral
3)
a 60o
lateral
4)
a 90o
branch line
2)
a 30o lateral
_________________ are drop down distances required for the pipe saddle to fit the contour of the outside surface of the run pipe or header:
1)
Laterals
2)
Triangulations
3)
Risers
4)
Ordinates
5)
Elements
4)
Ordinates
Patterns that are intended to be used repeatedly are generally drawn on heavy paper and then transferred to:
1)
thick cardboard
2)
thin Plexiglas
3)
neoprene rubber
4)
thin sheet metal
5)
thick clear plastic
4)
thin sheet metal
To help minimize stress on lateral connections, a(n) _____________ is sometimes welded between the header and the branch:
1)
bolt
2)
gusset
3)
spring
4)
drain line
2)
gusset
A lateral is the intersection of two pipes at:
1)
more than 90 o
2)
exactly 90 o
3)
less than 90 o
4)
more or less than 90 o
3)
less than 90 o
In order to calculate the height of the instrument, you will have to:
1)
add the benchmark and the back sight together
2)
subtract the back sight from the benchmark
3)
add the foresight and the height of the instrument together
4)
subtract the foresight from the height of the instrument
1)
add the benchmark and the back sight together
Incorrect Response
Closing out a circuit means to:
1)
close the paper and go back to the shop
2)
add up the back sight and the foresight to see if they are the same
3)
calculate all the unknown elevations of the stations
4)
make the last shot of the survey circuit a fore shot to the benchmark
4)
make the last shot of the survey circuit a fore shot to the benchmark
Unless clearly specified, the radius of the bend is measured to:
1)
the centreline of the pipe
2)
the back of the pipe
3)
the inside throat of the pipe
4)
the inside wall of the pipe
5)
the outside wall of the pipe
1)
the centreline of the pipe
Which of the following formulas would you use to calculate the gain on a bend?
1)
Gain = (Diameter x 2) + Tangents
2)
Gain = (Diameter x 2) – Length of bend
3)
Gain = (Diameter x 2) + Length of bend
4)
Gain = (Radius x 2) – Length of bend
5)
Gain = (Radius x 2) + Length of bend
Gain = (Radius x 2) – Length of bend
Incorrect Response
“The tendency of warm air to move upward in an enclosure similar to how smoke rises through a chimney” would be a good definition of the term:
1)
stratification
2)
stack effect
3)
buoyancy
4)
density
2)
stack effect
The ______________ is the most common design used in residential and light commercial buildings:
1)
cast-iron sectional boiler
2)
steel firetube boiler
3)
copper watertube boiler
4)
low thermal mass boiler
1)
cast-iron sectional boiler
Kinked PEX tubing:
1)
must be discarded and replaced
2)
must not be used in applications that exceed 10 psi and/or 60 oF
3)
can be repaired in the field using a small propane torch
4)
can be repaired in the field using a hot air gun
4)
can be repaired in the field using a hot air gun
The best location for a diaphragm-type expansion tank is:
1)
on the supply side, near the inlet of the circulator
2)
on the supply side, near the discharge of the circulator
3)
on the return side, near the inlet of the circulator
4)
on the return side, near the discharge of the circulator
1)
on the supply side, near the inlet of the circulator
Medium temperature hot water systems operate at pressures ranging from:
1)
0 to 30 psig
2)
30 to 60 psig
3)
30 to 150 psig
4)
350 to 500 psig
3)
30 to 150 psig
The pressure relief valve installed on a low-pressure hot water boiler should open at:
1)
12 psig
2)
15 psig
3)
20 psig
4)
30 psig
5)
75 psig
4)
30 psig
In a hydronic heating system, a 3-wire thermostat controls the operation of the:
1)
fuel supply valve
2)
flow control valve
3)
motorized zone valve
4)
intermittent circulation pump
3)
motorized zone valve
Most steam meters measure the __________________ of steam:
1)
volume
2)
pressure
3)
temperature
4)
weight
1)
volume
According to boiler codes, the receiver in a condensate pump steam heating system:
1)
must be closed off to atmosphere
2)
must be vented to atmosphere
3)
must be made of the same material as the boiler
4)
must be equipped with a vacuum breaker
2)
must be vented to atmosphere
Steam tracing can be used to:
1)
lower the viscosity of bunker “C” oil
2)
raise the viscosity of bunker “C” oil
3)
regulate the pH level of boiler feedwater
4)
change the relative density of condensate
1)
lower the viscosity of bunker “C” oil
Incorrect Response
1)
an inverted bucket trap
2)
an upright bucket trap
3)
a free float trap
Incorrect Response
4)
a bimetallic trap
1)
an inverted bucket trap
1)
a free float trap
2)
a float & thermostatic trap
3)
an impulse trap
4)
an upright bucket trap
2)
a float & thermostatic trap
1)
converter
2)
heat exchanger
3)
flash tank
4)
blowdown tank
3)
flash tank
1)
converter
2)
heat exchanger
3)
flash tank
4)
blowdown tank
converter
1)
vacuum breaker
2)
air vent
3)
thermostatic steam trap
4)
pressure relief valve
1)
vacuum breaker
__________________ tubing is often used for steam tracing applications:
1)
Stainless steel
2)
Aluminum
3)
Copper/nickel
4)
Titanium
1)
Stainless steel
1)
impede the discharge of condensate
2)
improve the discharge of condensate
3)
have no effect on the discharge of condensate
4)
improve the overall efficiency of the system
1)
impede the discharge of condensate
Incorrect Response
2)
improve the discharge of condensate
3)
have no effect on the discharge of condensate
4)
improve the overall efficiency of the system
1)
a chemical pot sampling line
2)
a steam kettle
3)
a water cooler
4)
instrumentation controls
4)
instrumentation controls
The operation of the thermodynamic steam trap is based on:
1)
Bernoulli’s Principle
Incorrect Response
2)
Pascal’s Law
3)
Dalton’s Principle
4)
Archimede’s Principle
1)
Bernoulli’s Principle
Which of the following statements best describes the float and thermostatic steam trap on initial start-up of the system?
1)
the float valve is open and the thermostatic element is closed
2)
the float valve and the thermostatic element are both closed
3)
the float valve and the thermostatic element are both open
4)
the float valve is closed and the thermostatic element is open
4)
the float valve is closed and the thermostatic element is open
1)
gate valve
2)
globe valve
3)
¼-turn ball valve
4)
needle valve
3)
¼-turn ball valve
1)
air separating tank
2)
condensate receiver
3)
expansion tank
4)
exhauster
2)
condensate receiver
1)
air separating tank
2)
condensate cooler
3)
overflow protector
4)
exhauster
4)
exhauster
1)
make-up water line
2)
condensate return line
3)
air vent line
4)
chemical feed line
1)
make-up water line
1)
make-up water going into the boiler
2)
condensate returning from the heat transfer units
3)
condensate returning to the boiler
4)
chemicals going into the boiler
3)
condensate returning to the boiler
1)
air separating tank
2)
condensate receiver
3)
chemical mixing tank
4)
expansion tank
1)
air separating tank
1)
24 VAC reversing control valve
2)
24 VDC reversing control valve
3)
120 VAC reversing control valve
4)
120 VDC reversing control valve
1)
24 VAC reversing control valve
1)
control valve
2)
heat balancer
3)
control panel
4)
differential controller
4)
differential controller
1)
control valve
2)
heat balancer
3)
control panel
4)
modulating controller
3)
control panel
1)
control valve
2)
heat balancer
3)
control panel
4)
modulating controller
2)
heat balancer
1)
air separating tank
2)
condensate receiver
3)
thermal expansion tank
4)
preheater
1)
air separating tank
1)
cyclone-type moisture separator
2)
baffle-type moisture separator
3)
mechanical steam trap
4)
pressure reducing valve
5)
boiler return trap
2)
baffle-type moisture separator
1)
steam radiator air vent
2)
hot water radiator air vent
3)
adjustable steam pressure regulator
4)
adjustable steam separator
1)
steam radiator air vent
1)
an air eliminator
2)
a condensate pump and receiver
3)
a surge tank
4)
a flash tank
5)
a vacuum pump
2)
a condensate pump and receiver
A mechanical steam heating system is a system that uses:
1)
a pump to circulate the steam through the system’s piping
2)
a mechanical device to circulate the steam through the system’s piping
3)
a mechanical device to return the condensate to the boiler
4)
a mechanical device to circulate the steam through the system’s piping and another mechanical device to return the condensate to the boiler
3)
a mechanical device to return the condensate to the boiler
A common type of mechanical system is a:
1)
one-pipe gravity steam heating system
2)
two-pipe gravity steam heating system
3)
one-pipe condensate pump system
4)
two-pipe condensate pump system
4)
two-pipe condensate pump system
The operating pressures usually found in the steam and condensate mains of a condensate pump system are:
1)
positive pressure in the steam main and atmospheric pressure in the return main
2)
negative pressure in the steam main and positive pressure in the return main
3)
positive pressure in the steam main and negative pressure in the return main
4)
positive pressure in the steam main and positive pressure in the return main
1)
positive pressure in the steam main and atmospheric pressure in the return main
The main function of a vapour heating system’s boiler return trap is to:
1)
return condensate to the boiler against gravity
2)
return condensate to the boiler against boiler pressure
3)
create and maintain positive steam pressure throughout the system
4)
prevent live steam from entering the condensate return lines of the system
2)
return condensate to the boiler against boiler pressure
Incorrect Response
Boiler return traps operate on the principle of:
1)
pressure and temperature
2)
float and counterbalance
3)
pressure and vacuum
4)
reciprocating motion
2)
float and counterbalance
1)
one-pipe counterflow flow steam system
2)
one-pipe parallel steam system
3)
one-pipe downfed steam system
4)
two-pipe downfed steam system
2)
one-pipe parallel steam system
1)
air scoop
2)
vacuum breaker
3)
differential controller
4)
quick vent
4)
quick vent
1)
15” away from the end of the main
2)
24” away from the end of the main
3)
36” away from the end of the main
4)
48” away from the end of the main
1)
15” away from the end of the main
1)
gravity steam heating system
2)
boiler return trap steam heating system
3)
condensate pump steam heating system
4)
vacuum pump steam heating system
Steam at a pressure of 2 psig travels at:
1)
a faster rate than steam at a pressure of 10 psig
2)
the same rate as steam at 10 psig
3)
a slower rate than steam at 10 psig
4)
a faster or slower rate than steam at psig, depending on the ambient temperature
1)
a faster rate than steam at a pressure of 10 psig
1)
the pressuretrol
2)
the LWCO
3)
the feedwater regulator
4)
the combination LWCO / feedwater regulator
2)
the LWCO
1)
36” (900 mm)
2)
24” (600 mm)
3)
18” (450 mm)
4)
12” (300 mm)
2)
24” (600 mm)
The minimum distance between pressure reducing valves installed in series is:
1)
10 feet ( 3 m )
2)
15 feet ( 5 m )
3)
20 feet ( 6.5 m )
4)
30 feet ( 10 m )
1)
10 feet ( 3 m )
1)
a LWCO equipped with quick hook-up fittings
2)
a LWCO equipped with a sight glass
3)
a LWCO equipped with a sensing line
4)
a feedwater regulator
1)
a LWCO equipped with quick hook-up fittings
1)
closed-type feedwater heater
2)
open-type feedwater heater
3)
dearator
4)
vent scrubber
2)
open-type feedwater heater
Superheated steam can be defined as:
1)
wet steam with a higher temperature than saturated steam for a given pressure
2)
dry saturated steam with the same temperature as wet saturated steam for a given pressure
3)
wet saturated steam at the temperature and pressure of vapourization
4)
dry saturated steam with a higher temperature than wet saturated steam for a given pressure
4)
dry saturated steam with a higher temperature than wet saturated steam for a given pressure
1)
chevron screen dryer
Incorrect Response
2)
cyclone separator
3)
dry pipe
4)
baffle plate
1)
feedwater pipe
2)
chemical feed pipe
3)
continuous blowdown pipe
4)
intermittent blowdown pipe
2)
chemical feed pipe
1)
feedwater pipe
2)
chemical feed pipe
3)
continuous blowdown pipe
4)
intermittent blowdown pipe
1)
feedwater pipe
Radiant-type superheaters are usually located in the:
1)
walls of the inside of the boiler
2)
top or upper portion of the boiler
3)
boiler’s steam drum
4)
center portion of the boiler
1)
walls of the inside of the boiler
1)
Hartford Loop
2)
Equalizer line
3)
Dry pipe
4)
Venturi
2)
Equalizer line
1)
a stop and check valve
2)
a slow-opening blowdown valve
Incorrect Response
3)
an O S & Y gate valve
4)
a crown valve
1)
a stop and check valve
1)
heating coil
Correct Answer
2)
steam separator
3)
drain pot
4)
ejector condenser
2)
steam separator
The lowest permissible water level in a steam boiler is:
1)
3” above the top row of tubes
2)
1” above the top row of tubes
3)
1” below the top row of tubes
4)
2 to 4” below the top row of tubes
2)
1” above the top row of tubes
Temporary hardness is sometimes referred to as:
1)
TDS
2)
calcium
3)
hard scale
4)
soft scale
4)
soft scale
The figure “3,206” represents the supercritical ______________ of steam:
1)
enthalpy
2)
temperature
3)
pressure
4)
volume
3)
pressure
1) 3
2) 4
3) 8
4) 9
2) 4
1) 4
2) 8
3) 9
4) 10
5) 11
5)
11
1) 11
2) 12
3) 13
4) 14
3) 13
A pop safety valve will open if the pressure inside the vessel exceeds ____ of the safety valve’s setting:
1)
6%
2)
8%
3)
10%
4)
25%
1)
6%
1)
blowdown tank
2)
dearator
3)
demineralizer
4)
surge tank
5)
feedwater heater
5)
feedwater heater
1)
primary superheater
2)
economizer
3)
desuperheater
4)
evaporator
2)
economizer
1)
primary superheater
2)
secondary superheater
3)
desuperheater
4)
economizer
1)
primary superheater
1)
primary superheater
2)
secondary superheater
3)
desuperheater
4)
economizer
3)
desuperheater
1)
primary superheater
2)
secondary superheater
3)
desuperheater
4)
economizer
2)
secondary superheater
“The use of a steam turbine for the production of steam for process and for the production of electrical power” would be a good definition of the term:
1)
co-generation
2)
co-operative
3)
duplex
4)
combination
1)
co-generation
The correct procedure for opening intermittent blowdown valves is to:
1)
open the slow-opening valve first, then the quick-opening valve
2)
open the quick-opening valve first, then the slow-opening valve
3)
open both valves at the same time
4)
none of the above because there are no recommended procedures for blowdown valve operations
2)
open the quick-opening valve first, then the slow-opening valve
1) 4
2) 5
3) 6
4) 9
2) 5
1)
the air preheater
2)
the combustion flue discharge
3)
the ID fan inlet
4)
the feedwater inlet
1)
the air preheater
1)
the primary superheater
2)
the secondary superheater
3)
the economizer
4)
the steam generating bank
4)
the steam generating bank
1)
a steam turbine rotor
2)
a forced draft fan
3)
an induced draft fan
4)
a low-pressure cylinder
5)
a cooling water pump impeller
1)
a steam turbine rotor
Most high pressure steam boilers are designed to operate with a pH value of approximately:
1)
0
2)
2.3 to 4.7
3)
6.9 to 7.1
4)
11 to 13.3
5)
8.5 to 10.5
5)
8.5 to 10.5
