Exam (elaborations)
Power Engineering 101 B-1.
- Module
- A level Biology
- Institution
- A Level Biology
Power Engineering 101 B-1.
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Power Engineering 101 B-1A multi element control system may utilize an 02 analyzer in the ________stream to
optimize the boiler combustion
A feed water
B steam
C airflow
D fluegas
E fuel flow - correct answer-C
Welders certificate of competency remains valid for _______ and then the welder must be
retested at an accredited organization.
A 5 yrs
B 6 mths
C 2 years
D 1 year
E 3 years - correct answer-C
Pumps have wear rings installed
A decrease pump maintenance cost
B a softer material than the pump casing
C Of harder material in the pump casing
D in the pump casing
E on the pump impeller's - correct answer-A,B,D,E
Due to the design of the_____Is it commonly immersed in the process fluid being pumped.
A diffuser pump
B plunger pump
C vertical pump
D regenerative pump
E sliding vane pump - correct answer-C
Wearing rings installed on pump impeller's should be constructed of a_______ material to
ensure the where is on the ring and not on the pump casing
A harder
B denser
C plastic
D Brittle
E softer - correct answer-E
In submerged arc welding (SAW) the arc zone is not visible to the welder because it occurs
below the flux.
A True the thick layer of flux completely covers the molten metal
B false the arc is visible to the welder because it occurs above the flux - correct answer-A
The internal feed pipe:
,A mitigates temperature shock within the drum
B reduces the sludge accumulation within the drum
C reduces the scale buildup within the drum
D distributes the incoming feed water evenly along the drum length
E Reduces turbulence of incoming feed water to the drum - correct answer-A,D,E
Welders certificate of competency can expire
A Specific reasons exist to question the welders ability to produce sound welds
B The welder has not welded with the welding process for six months or more
C All of the above
D two years have elapsed since the welder received their certificate
E None of the above - correct answer-C
The lip on a high-pressure safety valve:
A enables the safety valve to pop fully closed
B decreases the area of the valve disc exposed to the stem
C Is commonly referred to as a spindle
D Decreases the force of steam acting upon the seat
E increases the force of steam acting up on the seat - correct answer-E
The middle section of a recovery boiler furnace is the_______
A Cooling zone
B Drying zone
C Heating zone
D Oxidizing zone
E Reducing zone - correct answer-B
_________Is a type of mechanical draft that takes in outside air increases the pressure to
supply the required volume of combustion air to the furnace.
A natural draft fans
B centrifugal draft fans
C Induced draft fans
D Balanced draft fans
E Forced draft fans - correct answer-E
A two element control system is referred to as a feed forward system as it anticipates
fluctuations in _________ to reduce the impact of shrink and swell in the system
A Watertube level
B attemperator level
C Mud drum
D economizer level
E steam drum level - correct answer-E
Centrifugal pump designs include:
A sliding vane
B axial flow
C mixed flow
D volute
,E diffuser
F Regenerative - correct answer-B,C,D,E
In pump installations with a pump central line is below the supply source the_______ can't
be determined by following: static suction head + suction pressure head - suction function
head + suction velocity head.
A dynamic discharge head
B total dynamic head
C Dynamic suction left
D atmospheric head
E Dynamic suction head - correct answer-E
Float and electrode probe type_____ Are used to protect the integrity of the boiler internals
from overheating.
A manual blow downs
B High pressure safety relief valves
C gauge class
D regulators
E Low water fuel cut offs - correct answer-E
The ________ Is more common than the integral tight and has rows of horizontal tubes
located outside of the furnace that combustion blue gases are directed over over.
A pendant economizer
B Bypass economizer
C recirculation economizer
D separate economizer
E integral economizer - correct answer-D
_________ has flat plates welded to each side of the water tube boiler tubes to fill the
spaces between the tubes, providing a pressure tight wall around the boiler.
A Membrane tube wall
B tangent tube wall
C Pendant tube wall
D Separate tube wall
E Flat stud tube wall - correct answer-E
Biomass burning systems include:
A pinhole grates
B Travelling grates
C vibrating grates
D Dutch oven's
E All of the above - correct answer-E
The fuel particles are suspended in a hot bubbling fluid bed of ash and other particulate
materials such as limestone and sand in a _______ boiler.
A HRSG
B Direct fired
C fluidized bed combustion
, D Steam flooding
E mass burning - correct answer-C
Combined cycle power generation systems used for facility process requirements include the
following components:
A all of the above
B steam turbine generator with condenser
C auxiliary components
D heat recovery steam generator
E gas turbine generator - correct answer-A
A direct pressure/parallel positioning combustion control system reacts to changes to
the______
A furnace pressure
B Boiler/steam pressure
C airflow
D Steam flow
E Fuel flow - correct answer-B
It is a code requirement to inspect and test the operation of a low water level fuel cut
off_______
A every three years
B quarterly
C Semi annually
D Periodically
E Annually - correct answer-C
A rolling mill is used to______A boiler tube
A Compress and burnish
B Lengthen and reduce the wall thickness
C Compress and strengthen
D Shrink and strengthen
E expand and burnish - correct answer-B
Adequate provisions for______Are required in piping and ductwork systems by means of
loops, bends, or offsets.
A Expansion
B Thrust
C Cooling
D Pressure
E Heating - correct answer-A
Pump stuffing boxes: select all that apply (3\5)
A Creates a thrust in the axial direction
B Prevents the egress of process fluid out of the casing when the pressure is above
atmospheric
C Has liquid supplied to the seal to prevent air ingress or egress
D Are filled with packing rings to provide a seal between the pump shaft and casing
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