Book 1 Unit 1 Flashcards
In a vertical firetube boiler, the steam space is located:
A) At the lower part of the shell
B) In a separate chamber
C) In the firetubes
D) In a compartment on the side
E) At the top of the shell
E) At the top of the shell
The “O” type boiler is constructed with __________ drums.
A) Two
B) Three
C) Five
D) One
E) Four
A) Two
A major advantage of the Locomotive boiler was the:
A) Size of the smoke box
B) Use of longitudinal stays
C) Internal furnace
D) Absence of brickwork, refractory or setting
E) Use of a draft inducer
D) Absence of brickwork, refractory or setting
As per applicable code the pressure and temperature limiting factors for steam and hot water heating boilers are:
A) 121 kPa or 103ºC (17.5 psi or 217ºF) for steam and 1103 kPa (160psi) for hot water
B) 1103 kPa (160psi) for steam and 103 kPa or 121ºC (14.7 or 250ºF) for hot water
C) 1103 kPa or 121ºC (160 psi or 250ºC) for steam and 1103 kPa (160 psi) for hot water
D) 100 kPa (15psi) for steam and 120ºC or 1100 kPa (250ºF or 160 psi) for hot water
E) 103 kPa (15psi) for steam and 121ºC or 1100 kPa (250ºF or 160psi) for hot water
E) 103 kPa (15psi) for steam and 121ºC or 1100 kPa (250ºF or 160 psi) for hot water
A disadvantage of condensing boilers is that:
A) The heat exchangers in them are quite small
B) The boilers are less expensive than customary boilers
C) Any moisture in the flue gases will not condense out
D) Less heat is exerted from the hot flue gases
E) The boilers are more expensive than customary boilers
E) The boilers are more expensive than customary boilers
The “D” type boiler is constructed with _______ drums.
A) Three
B) Two
C) Four
D) One
E) Five
B) Two
The stamping on a packaged firetube boiler may indicate a Maximum Allowable Working Pressure (MAWP) of 1000 kPa (145 psi), but the applicable code or Certificate of Inspection may show a MAWP of:
A) 103 kPa (14.7 psi)
B) 1100 kPa (159.5 psi)
C) 160 kPa (23.2 psi)
D) 1000 kPa (145 psi)
E) 100 kPa (14.5 psi)
A) 103 kPa (14.7 psi)
Vertical firetube boilers have an advantage when _______ is limited.
A) Temperature
B) Floor space
C) Pressure
D) Weight
E) Height
B) Floor space
In a firetube boiler ________ pass through the tubes.
A) Hot air
B) Fuel oil
C) Fuel gas
D) Hot gases
E) Feedwater
D) Hot gases
The cylindrical portion of the Locomotive boiler that connected the furnace to the smoke box was termed the:
A) Furnace
B) Crown sheet
C) Firetube
D) Fire door
E) Barrel
E) Barrel
Water circulation in the longitudinal drum boiler is created by:
A) The water circulation pump
B) Higher density feedwater
C) Higher density boiler water
D) Direction of feedwater supply
E) Lower density feedwater
B) Higher density feedwater
The boilers in multiple boiler heating plants are operated:
A) Manually as required
B) By temperature controllers
C) Individual by separate controllers
D) In sequence by a step controller
E) By the outdoor temperature
D) In sequence by a step controller
An immersion-type electric boiler has:
A) Electrodes
B) Tube bundles
C) Elements
D) Water tubes
E) No steam space
C) Elements
One of the characteristics of a firetube boiler is:
A) Their large water capacity makes them fast in coming up to operating pressure
B) The small amount of heat stored in the water makes it possible to meet load changes quickly
C) Their small water capacity makes them fast in coming up to operating pressure
D) Their small water capacity makes them slow in coming up to operating pressure
E) Their large water capacity makes them slow in coming up to operating pressure
E) Their large water capacity makes them slow in coming up to operating pressure
An advantage of an electric boiler is the:
A) High cost of manufacturing
B) Inefficiency of the energy transfer
C) Requirement for duct work and chimneys
D) High cost of the electricity
E) Compactness of the boiler
E) Compactness of the boiler
