CLASS 5 BOILER TEST - Sep 2025 2025-2026
Most Recent Version Comprehensive 470
Questions and Verified Answers Accurate
Solutions Already Graded A+ Get it 100% Correct
"low strength" bolting shall conform to: - CORRECT ANSWER: ASTM A193 specification
ASTM A307 specification
ASTM A320 specification
"Seamless" pipe is manufactured under what ASTM specification(s) - CORRECT
ANSWER: A-106
A-53
**A stop valve CANNOT be installed btwn the boiler and the relief valve.... - CORRECT
ANSWER: TRUE
**Can you put a shutoff valve between the pressure vessel and the safety? - CORRECT
ANSWER: NO
**How many threads on a 2 1/2" pipe? - CORRECT ANSWER: 11 1/2
3-1/2" x 2-1/4" x 5/8" = - CORRECT ANSWER: 4-59/64" . Check this with someone at
the Hall
A 20' lenght of 4" schd 40 pipe weighs how much empty and how much full of water? -
CORRECT ANSWER: Empty - 245 lbs
Full - 350 lbs
,A boiler with over 500 sq ft heating surface, needs to have at least 2 means of feeding
the boiler - CORRECT ANSWER: TRUE
A device used to prevent damage from electrical overloads is a - CORRECT ANSWER:
fuse
A friction lighter is a striker - CORRECT ANSWER: True
A full fillet weld has... - CORRECT ANSWER: A throat equal to the thickness of the
thinnest material
A globe valve is ordinarily used when: - CORRECT ANSWER: Control of flow by
throttling is neede.
High pressure drop is unimportant.
Restriction of flow is NOT a factor.
A Hartford Loop is often used in the return line with a - CORRECT ANSWER: Low
pressure steam boiler
A hot spot in the rubber insulation of a welding lead indicates... - CORRECT ANSWER:
The welding lead is damaged to the point there is resistance to the current flow
a pipe sized 2 1/2" carrying a load of 2800 lbs requires what minimum size rod -
CORRECT ANSWER: 7/8"
A relief valve is a type of pressure control valve that is designed to open automatically
when the line pressure is too high - CORRECT ANSWER: TRUE
A series of short dashes on a blueprint means... - CORRECT ANSWER: HIDDEN LINE
,A standard 2-inch thread that has been properly cut will allow the fitting to hand turn
how many times? - CORRECT ANSWER: 3 1/2 turns
A stop valve cannot be installed btwn the boiler and the relief valve. - CORRECT
ANSWER: TRUE
A valve that keeps the flow of a liquid going in one direction within the line is called... -
CORRECT ANSWER: A CHECK VALVE
A valve whose function is to relieve the excess generation of steam and maintain the
pressure at safe limits for the operation of a steam boiler is called - CORRECT
ANSWER: A safety valve
A water tank is 6' wide, 6' high and 4' long. if the tank is 1/2 full what is the weight of the
water - CORRECT ANSWER: H x L x W = 144
144/2 = 72
72 x 62.4 = 4492.8 lbs
Adding a pipe branch by means of welding is allowed if... - CORRECT ANSWER: The
need for reinforcements has been calculated
Adjustable hangers are required for pipe ________ and larger - CORRECT ANSWER:
2-1/2"
Agriculturally used air tanks on a farm are exempt. - CORRECT ANSWER: True
Air at sea level has how much oxygen in it - CORRECT ANSWER: 20.95%
Air in a refrigeration system can increase head pressure and temperature - CORRECT
ANSWER: TRUE
, All butt-welds (girth and longitudinal)n shall be radiographically examined when: -
CORRECT ANSWER: Pipe size is 4" for temps 800 degrees re of cast iron
All valves and fittings on steam lines shall have a pressure rating at least 100 . psi -
CORRECT ANSWER: TRUE
alloy steel bolts and nuts shall be - CORRECT ANSWER: either threaded full length.
provided with reduced shanks of a diameter not less than that of the root of the threads.
have ANSI heavy hexagonal threaded nuts.
An acetylene cylinder is filled with - CORRECT ANSWER: porous filler material
acetone
An anchor guide must be placed ahead of the expansion joint on a steam main to... -
CORRECT ANSWER: Protect the sleeve from scoring
An ASME relief valve on a forced flow water system should be connected - CORRECT
ANSWER: Directly to the boiler
An automatic pressure relief device actuated by the static pressure upstream of the
valve and characterized by full opening POP ACTION. It is used for gas and vapor
service.... - CORRECT ANSWER: SAFETY VALVE...
An automatic pressure relieving device actuated by the static pressure upstream of the
valve which opens further with the increase in pressure over the opening pressure. It is
used primarily for fluid service... - CORRECT ANSWER: RELIEF VALVE pressure relief
valve
Most Recent Version Comprehensive 470
Questions and Verified Answers Accurate
Solutions Already Graded A+ Get it 100% Correct
"low strength" bolting shall conform to: - CORRECT ANSWER: ASTM A193 specification
ASTM A307 specification
ASTM A320 specification
"Seamless" pipe is manufactured under what ASTM specification(s) - CORRECT
ANSWER: A-106
A-53
**A stop valve CANNOT be installed btwn the boiler and the relief valve.... - CORRECT
ANSWER: TRUE
**Can you put a shutoff valve between the pressure vessel and the safety? - CORRECT
ANSWER: NO
**How many threads on a 2 1/2" pipe? - CORRECT ANSWER: 11 1/2
3-1/2" x 2-1/4" x 5/8" = - CORRECT ANSWER: 4-59/64" . Check this with someone at
the Hall
A 20' lenght of 4" schd 40 pipe weighs how much empty and how much full of water? -
CORRECT ANSWER: Empty - 245 lbs
Full - 350 lbs
,A boiler with over 500 sq ft heating surface, needs to have at least 2 means of feeding
the boiler - CORRECT ANSWER: TRUE
A device used to prevent damage from electrical overloads is a - CORRECT ANSWER:
fuse
A friction lighter is a striker - CORRECT ANSWER: True
A full fillet weld has... - CORRECT ANSWER: A throat equal to the thickness of the
thinnest material
A globe valve is ordinarily used when: - CORRECT ANSWER: Control of flow by
throttling is neede.
High pressure drop is unimportant.
Restriction of flow is NOT a factor.
A Hartford Loop is often used in the return line with a - CORRECT ANSWER: Low
pressure steam boiler
A hot spot in the rubber insulation of a welding lead indicates... - CORRECT ANSWER:
The welding lead is damaged to the point there is resistance to the current flow
a pipe sized 2 1/2" carrying a load of 2800 lbs requires what minimum size rod -
CORRECT ANSWER: 7/8"
A relief valve is a type of pressure control valve that is designed to open automatically
when the line pressure is too high - CORRECT ANSWER: TRUE
A series of short dashes on a blueprint means... - CORRECT ANSWER: HIDDEN LINE
,A standard 2-inch thread that has been properly cut will allow the fitting to hand turn
how many times? - CORRECT ANSWER: 3 1/2 turns
A stop valve cannot be installed btwn the boiler and the relief valve. - CORRECT
ANSWER: TRUE
A valve that keeps the flow of a liquid going in one direction within the line is called... -
CORRECT ANSWER: A CHECK VALVE
A valve whose function is to relieve the excess generation of steam and maintain the
pressure at safe limits for the operation of a steam boiler is called - CORRECT
ANSWER: A safety valve
A water tank is 6' wide, 6' high and 4' long. if the tank is 1/2 full what is the weight of the
water - CORRECT ANSWER: H x L x W = 144
144/2 = 72
72 x 62.4 = 4492.8 lbs
Adding a pipe branch by means of welding is allowed if... - CORRECT ANSWER: The
need for reinforcements has been calculated
Adjustable hangers are required for pipe ________ and larger - CORRECT ANSWER:
2-1/2"
Agriculturally used air tanks on a farm are exempt. - CORRECT ANSWER: True
Air at sea level has how much oxygen in it - CORRECT ANSWER: 20.95%
Air in a refrigeration system can increase head pressure and temperature - CORRECT
ANSWER: TRUE
, All butt-welds (girth and longitudinal)n shall be radiographically examined when: -
CORRECT ANSWER: Pipe size is 4" for temps 800 degrees re of cast iron
All valves and fittings on steam lines shall have a pressure rating at least 100 . psi -
CORRECT ANSWER: TRUE
alloy steel bolts and nuts shall be - CORRECT ANSWER: either threaded full length.
provided with reduced shanks of a diameter not less than that of the root of the threads.
have ANSI heavy hexagonal threaded nuts.
An acetylene cylinder is filled with - CORRECT ANSWER: porous filler material
acetone
An anchor guide must be placed ahead of the expansion joint on a steam main to... -
CORRECT ANSWER: Protect the sleeve from scoring
An ASME relief valve on a forced flow water system should be connected - CORRECT
ANSWER: Directly to the boiler
An automatic pressure relief device actuated by the static pressure upstream of the
valve and characterized by full opening POP ACTION. It is used for gas and vapor
service.... - CORRECT ANSWER: SAFETY VALVE...
An automatic pressure relieving device actuated by the static pressure upstream of the
valve which opens further with the increase in pressure over the opening pressure. It is
used primarily for fluid service... - CORRECT ANSWER: RELIEF VALVE pressure relief
valve
