DC 1st Class Boiler Questions With Complete Solutions
______ is the ability of a material to return to its original shape
after being deformed. Correct Answers Resiliency
______ is the plasticity exhibited by a material under tension
loading. Correct Answers Ductility
_______ combustion control ensures that an oxygen-deficient
condition is not encountered, especially during load changes
Correct Answers Cross-limiting
_______ is an alloy of chromium, cobalt, and tungsten used to
treat the interior components of valves to make them very hard
and erosion resistant. Correct Answers stellite
_______ is the refrigerant in an absorber system. Correct
Answers Water
_______ is the weight of a given volume of a liquid divided by
the weight of an equal volume of water, when both are measured
at the same temperature. Correct Answers Specific gravity
_______ is the weight of a given volume of material divided by
the weight of an equal volume of water when both are measured
at the same temperature (typically 60°F) Correct Answers
Specific gravity
________ air supplied to a furnace controls the rate of
combustion Correct Answers Primary
, ________ settings on the pressure controls are normally
staggered so boilers can lead and lag. Correct Answers
Differential
________ with regard to calves, is the relationship between the
amount a valve is open and the amount of flow through the
valve. Correct Answers Characterization
________is a water-purification process in which the water to be
treated is pressurized and applied against the surface of a
semipermeable membrane. Correct Answers Reverse osmosis
A _____ is a metal brace on a HRT boiler used to attach a wall
to steel framework that supports the wall Correct Answers
buckstay
A ______ boiler is water tube boiler design which three steam
and water drums on the top and a mud drum beneath,
interconnected by a large number of water tubes. Correct
Answers Sterling
A ______ in line heat exchanger installed in the deaerator which
minimizes steam loss to the atmosphere. Correct Answers vent
condenser
A ______ is the condition that is being controlled Correct
Answers process variable
A _______ boiler is an electric power generation system that
uses both a gas turbine-driven generator and a steam drives
generator. Correct Answers Combined -cycle
______ is the ability of a material to return to its original shape
after being deformed. Correct Answers Resiliency
______ is the plasticity exhibited by a material under tension
loading. Correct Answers Ductility
_______ combustion control ensures that an oxygen-deficient
condition is not encountered, especially during load changes
Correct Answers Cross-limiting
_______ is an alloy of chromium, cobalt, and tungsten used to
treat the interior components of valves to make them very hard
and erosion resistant. Correct Answers stellite
_______ is the refrigerant in an absorber system. Correct
Answers Water
_______ is the weight of a given volume of a liquid divided by
the weight of an equal volume of water, when both are measured
at the same temperature. Correct Answers Specific gravity
_______ is the weight of a given volume of material divided by
the weight of an equal volume of water when both are measured
at the same temperature (typically 60°F) Correct Answers
Specific gravity
________ air supplied to a furnace controls the rate of
combustion Correct Answers Primary
, ________ settings on the pressure controls are normally
staggered so boilers can lead and lag. Correct Answers
Differential
________ with regard to calves, is the relationship between the
amount a valve is open and the amount of flow through the
valve. Correct Answers Characterization
________is a water-purification process in which the water to be
treated is pressurized and applied against the surface of a
semipermeable membrane. Correct Answers Reverse osmosis
A _____ is a metal brace on a HRT boiler used to attach a wall
to steel framework that supports the wall Correct Answers
buckstay
A ______ boiler is water tube boiler design which three steam
and water drums on the top and a mud drum beneath,
interconnected by a large number of water tubes. Correct
Answers Sterling
A ______ in line heat exchanger installed in the deaerator which
minimizes steam loss to the atmosphere. Correct Answers vent
condenser
A ______ is the condition that is being controlled Correct
Answers process variable
A _______ boiler is an electric power generation system that
uses both a gas turbine-driven generator and a steam drives
generator. Correct Answers Combined -cycle
