DC 3rd Class Test, 3rd
class stationary steam
engineer license prep,
Stationary Engineer,
Station engineer exam, DC
1st Class Boiler Actual
Exam Newest Complete
200 Questions And
Correct Detailed Answers|
Already Graded A+
,What gages are on a steam boiler? - ANSWER -pressure gage - water gage glass
What gages are on a HW boiler? - ANSWER -pressure - Temp
Name three types of low water cutoffs. - ANSWER -1. float magnetic (rod to magnet to mercury
switch) 2. Float linkage- link to mercury switch 3. Submerged electrode- water
Boilers having more than 500square feet of heating surface should have how many means of feed
water? - ANSWER -2
Types of FEEDWATER REGULATORS - ANSWER -1.Thermostatic mechanical regulator 2. Thermostatic
fluid style 3. Float operated style
Name two types of commonly used feedwater pumps - ANSWER -Injector and Inspirator
What piping arrangment is used to return condensate from steam lines and steam seperators? -
ANSWER -HOLLYLOOP
What would happen if high temp liquid passes through a centrifugal pump? - ANSWER -WIRE
DRAWING
A multi stage pump can be either __________ or_______ ? - ANSWER -Volute or Diffuser
To prevent cavitation most pumps are stamped with the ____ _______ _______ ____ ? - ANSWER -
NET POSITIVE SUCTION HEAD
,What are two types of condensate return systems?? - ANSWER -a.) Mechanical Return ; uses steam
traps and pumps to aid return b.) Gravity Return System : uses gravity
TO PREVENT THE SUPERHEATER FROM OVERHEATING ON START UP WHAT SHOULD YOU DO -
ANSWER -EITHER FLOOD THE TUBES WITH WATER OR THE SUPERHEATER SHOULD BE VENTED TO
THE ATMOSPHERE BY A FREE BLOW VALVE UNTIL THE BOILER GOES ON LINE.
What device acts as a check valve in both directions and keeps the pump primmed? - ANSWER -
FOOT VALVES ARE USED ON PUMPS UNDER SUCTION PRESSURE AND PREVENT FLOW ON SUCTION
LINE
WHAT PUMP HAS A WATER PISTON DIRECTLY CONNECTED TO A STEAM DRIVEN PISTON VIA A ROD?
- ANSWER -RECIPRICATING
What causes a piston type trap to open? - ANSWER -cold condensate (on test the steam psi drop and
temp drop was used)
Quickly opening a steam valve will cause _______ ________ . - ANSWER -water hammer
What mechanical device removes scale from a watertube boiler? - ANSWER -a tube turbine
What causes blistering? - ANSWER -A slag inclusion forming a lamination at the time the plate was
rolled in the steel mill and it's actually a seperation of metal from the shell plate caused by
impurities rolled into the shellplate when it was formed.
To internally remove oxygen from the boiler use______ ________ . - ANSWER -Sodium Sulfite
A positioning control system is used on a ______ ________ - ANSWER -a process boiler
A saybolt universal is a - ANSWER -measurement of viscosity
Creep gets worse with _______________ __________ - ANSWER -elevated temps
What type of valve WOULD NOT be a good choice if sediment were present - ANSWER -GLOBE
, How many btus does it take to take 10 lbs of steam from 40 to 41 degrees - ANSWER -10 btus
1btu=1lb
What is it called when you let a peice of equipment fail before you repair/replace it? - ANSWER -
Breakdown maintenance
What percent of blistering or buldging is ok? - ANSWER -2%
What kind of boiler are staybolts found on? - ANSWER -Fire tube boilers
A 8 foot length of tube or shell can take up to ___% sag or bend and still be used without replacing? -
ANSWER -2%
What does a low water cutoff do in a low water condition? - ANSWER -Shuts off fuel supply
What is the first indication of a low water condition - ANSWER -A red hot crown sheet
If a boiler exceeds 100psi it must have how many blowdowns? - ANSWER -2
What is the appropriate test for checking porosity of the metal? - ANSWER -PULSE ECHO ( A TYPE OF
ULTRASONIC)
What chemicals are used to combat corrosion? - ANSWER -Sodium Sulfite; hydrazine; catalied
hydrazine
If your boiler water has a PH of .5 what compound type do you add to neutralize it? - ANSWER -
BASES - THEY REACT WITH ACIDS TO FORM A SALT
What level of deionized water alkalinityis permitted for a 600 psi boiler? - ANSWER -250 PPM
What can oxygen cause in a system - ANSWER -PITTING CORROSION
class stationary steam
engineer license prep,
Stationary Engineer,
Station engineer exam, DC
1st Class Boiler Actual
Exam Newest Complete
200 Questions And
Correct Detailed Answers|
Already Graded A+
,What gages are on a steam boiler? - ANSWER -pressure gage - water gage glass
What gages are on a HW boiler? - ANSWER -pressure - Temp
Name three types of low water cutoffs. - ANSWER -1. float magnetic (rod to magnet to mercury
switch) 2. Float linkage- link to mercury switch 3. Submerged electrode- water
Boilers having more than 500square feet of heating surface should have how many means of feed
water? - ANSWER -2
Types of FEEDWATER REGULATORS - ANSWER -1.Thermostatic mechanical regulator 2. Thermostatic
fluid style 3. Float operated style
Name two types of commonly used feedwater pumps - ANSWER -Injector and Inspirator
What piping arrangment is used to return condensate from steam lines and steam seperators? -
ANSWER -HOLLYLOOP
What would happen if high temp liquid passes through a centrifugal pump? - ANSWER -WIRE
DRAWING
A multi stage pump can be either __________ or_______ ? - ANSWER -Volute or Diffuser
To prevent cavitation most pumps are stamped with the ____ _______ _______ ____ ? - ANSWER -
NET POSITIVE SUCTION HEAD
,What are two types of condensate return systems?? - ANSWER -a.) Mechanical Return ; uses steam
traps and pumps to aid return b.) Gravity Return System : uses gravity
TO PREVENT THE SUPERHEATER FROM OVERHEATING ON START UP WHAT SHOULD YOU DO -
ANSWER -EITHER FLOOD THE TUBES WITH WATER OR THE SUPERHEATER SHOULD BE VENTED TO
THE ATMOSPHERE BY A FREE BLOW VALVE UNTIL THE BOILER GOES ON LINE.
What device acts as a check valve in both directions and keeps the pump primmed? - ANSWER -
FOOT VALVES ARE USED ON PUMPS UNDER SUCTION PRESSURE AND PREVENT FLOW ON SUCTION
LINE
WHAT PUMP HAS A WATER PISTON DIRECTLY CONNECTED TO A STEAM DRIVEN PISTON VIA A ROD?
- ANSWER -RECIPRICATING
What causes a piston type trap to open? - ANSWER -cold condensate (on test the steam psi drop and
temp drop was used)
Quickly opening a steam valve will cause _______ ________ . - ANSWER -water hammer
What mechanical device removes scale from a watertube boiler? - ANSWER -a tube turbine
What causes blistering? - ANSWER -A slag inclusion forming a lamination at the time the plate was
rolled in the steel mill and it's actually a seperation of metal from the shell plate caused by
impurities rolled into the shellplate when it was formed.
To internally remove oxygen from the boiler use______ ________ . - ANSWER -Sodium Sulfite
A positioning control system is used on a ______ ________ - ANSWER -a process boiler
A saybolt universal is a - ANSWER -measurement of viscosity
Creep gets worse with _______________ __________ - ANSWER -elevated temps
What type of valve WOULD NOT be a good choice if sediment were present - ANSWER -GLOBE
, How many btus does it take to take 10 lbs of steam from 40 to 41 degrees - ANSWER -10 btus
1btu=1lb
What is it called when you let a peice of equipment fail before you repair/replace it? - ANSWER -
Breakdown maintenance
What percent of blistering or buldging is ok? - ANSWER -2%
What kind of boiler are staybolts found on? - ANSWER -Fire tube boilers
A 8 foot length of tube or shell can take up to ___% sag or bend and still be used without replacing? -
ANSWER -2%
What does a low water cutoff do in a low water condition? - ANSWER -Shuts off fuel supply
What is the first indication of a low water condition - ANSWER -A red hot crown sheet
If a boiler exceeds 100psi it must have how many blowdowns? - ANSWER -2
What is the appropriate test for checking porosity of the metal? - ANSWER -PULSE ECHO ( A TYPE OF
ULTRASONIC)
What chemicals are used to combat corrosion? - ANSWER -Sodium Sulfite; hydrazine; catalied
hydrazine
If your boiler water has a PH of .5 what compound type do you add to neutralize it? - ANSWER -
BASES - THEY REACT WITH ACIDS TO FORM A SALT
What level of deionized water alkalinityis permitted for a 600 psi boiler? - ANSWER -250 PPM
What can oxygen cause in a system - ANSWER -PITTING CORROSION
