Book 1 Unit 3

Question 1

In the dry boiler lay up method the boiler is dried out completely then trays with moisture absorbing materials such as ________ are placed in the shell.
1. Slack lime
2. Sodium sulphide
3. Activated alumina
4. Sodium hydroxide
5. Silica gel

A) 1,2,3
B) 1,3,5
C) 2,3,4
D) 2,3,5
E) 3,4,5

Answer 1

B) 1,3,5

Question 2

During the filling of an empty boiler, a valve that should be open to allow the air to escape is the:
A) Boiler vent valve
B) Gauge glass stem valve
C) Boiler drain valve
D) Boiler stop valve
E) Gauge glass drain valve

Answer 2

A) Boiler vent valve

Question 3

It is vitally important that a boiler operator be aware of the damage due to _______ can be done when a cold firetube boiler is fired up too fast.
A) Water side corrosion
B) Steam expansion
C) Water hammer
D) Uneven expansion and thermal shock
E) Fire side erosion

Answer 3

D) Uneven expansion and thermal shock

Question 4

When the heating plant has two or more boilers supplying steam to a common steam supply header and one or more boilers are already in operation the ______ during the warm-up period.
A) Steam vent valve of the boiler that is being started up must be kept open
B) Steam stop valve of the boiler that is being started up must be kept closed
C) Feedwater valve of the boiler that is being started up must be kept closed
D) Feedwater stop valve of the boiler that is being started up must be kept open
E) Steam stop valve of the boiler that is being started up must be kept open

Answer 4

B) Steam stop valve of the boiler that is being started up must be kept closed

Question 5

Boiler priming occurs as the result of:
A) A chemical problem within the boiler
B) The loss of flame in the furnace
C) The low steam production
D) A mechanical malfunction
E) A low water condition

Answer 5

D) A mechanical malfunction

Question 6

When removing a hot water boiler from service open the blow-off drain valve on the bottom of the boiler to remove any sediment that may have collected stopping when the:
A) Boiler is empty
B) Low water fuel cutoff activates
C) Low water level alarm sounds
D) Water level drops below the gauge glass
E) Water runs clear

Answer 6

E) Water runs clear

Question 7

Boiler carryover occurs as the result of:
A) A mechanical malfunction
B) The low steam production
C) A low water condition
D) A chemical problem within the boiler
E) The loss of flame in the furnace

Answer 7

D) A chemical problem within the boiler

Question 8

Heavy soot build-up can affect combustion conditions in the furnace and may result in:
A) A boiler low water condition
B) A furnace flame out
C) A furnace explosion
D) Increased sludge and scale formation
E) Loss of ignition

Answer 8

C) A furnace explosion

Question 9

The maximum operating temperature of a hot water boiler should never exceed:
A) 77ºC (170ºF)
B) 120ºC (248ºF)
C) 150ºC (302ºF)
D) 50ºC (98ºF)
E) 121ºC (250ºF)

Answer 9

E) 121ºC (250ºF)

Question 10

A complete check of the boiler heating system should be carried out:
A) Some time during the next heating season
B) At the convenience of the Chief Engineer
C) At the end of the heating season
D) At the start of the next heating season
E) Some time over the summer

Answer 10

C) At the end of the heating season

Question 11

The best method of determining that adequate attention is being given to the boiler and its control equipment is to:
A) Provide a boiler log
B) Have the office secretary keep records
C) Make notes on scrap paper
D) Keep a personal daily diary
E) Tell the plant Chief Engineer all the problems

Answer 11

A) Provide a boiler log

Question 12

Whenever there are signs of a tube leak during boiler operation:
A) Watch that it does not get worse
B) Reduce the firing rate to the minimum
C) Shut down the boiler immediately
D) Maintain a steady firing rate
E) Close the stop valve on the steam outlet

Answer 12

C) Shut down the boiler immediately

Question 13

After cleaning, cast-iron boilers should be left completely filled with ________ in order to reduce corrosion:
A) Water
B) A slightly basic solution
C) Light oil
D) A mixture of oil and antifreeze
E) A slightly acidic solution

Answer 13

A) Water

Question 14

Steam heating boilers with little or no make-up water should only require once a _______ blowdown.
A) Week
B) Shift
C) Day
D) Month
E) Hour

Answer 14

A) Week

Question 15

Thermal shock occurs when metal is subjected to a sudden change in temperature, the temperature change will not be even throughout the metal, and:
A) Expansion and contraction will not be equal in all parts of the metal
B) This causes strong external stresses in the metal
C) This causes weak internal stresses in the metal
D) The smaller the temperature change the greater the internal stresses will be
E) The lighter the metal, the greater the internal stresses will be

Answer 15

A) Expansion and contraction will not be equal in all part of the metal

Question 16

Before a new boiler may be started up it must have:
A) An inspection by the Fire Commissioner
B) The permission of the union
C) A valid inspection certificate
D) The permission of the Plant Chief Engineer
E) An inspection by the manufacturer

Answer 16

C) A valid inspection certificate

Question 17

When a steam boiler has to be taken out of service give it a good blowdown to remove as much sediment as possible stop when the drain runs clear. Refill the boiler to the top of the glass maintaining the boiler water temperature above ________ for about one hour to release all the dissolved gases.
A) 120ºC (248ºF)
B) 50ºC (98ºF)
C) 85ºC (185ºF)
D) 77ºC (170ºF)
E) 121ºC (250ºF)

Answer 17

C) 85ºC (185ºF)

Question 18

If boiler water level has dropped below the gauge glass during boiler operation, the operator is to:
A) Slowly reduce the boiler load
B) Immediately restore water level before shutting off the unit
C) Contact the boiler inspector immediately
D) Open the blowdown valves in order to have the low water fuel cut-off trip the unit
E) Shut down, cool, and then inspect the boiler for damage before refilling

Answer 18

E) Shut down, cool, and then inspect the boiler for damage before refilling

Question 19

The boiler firebox, gas passages and chimney should be thoroughly cleaned by wire brushing and:
A) Scrubbing
B) Oiling
C) Sand blasting
D) Painting
E) Vacuuming

Answer 19

E) Vacuuming

Question 20

The boiler certificate of inspection:
A) Should be conspicuously placed adjacent to the boiler or retained and safeguard in a manner approved by the inspector
B) Can be kept in a file cabinet
C) Must be kept in the log book
D) Must be delayed in the Chief Engineers office
E) Need not be retained as the Boiler Inspector has a copy

Answer 20

A) Should be conspicuously placed adjacent to the boiler or retained and safeguard in a manner approved by the inspector