RED SEAL TEST QUESTIONS || with errorless answers.
FLow detector measure flow using the principle that flow rate is? correct answers Directly
proportional to the square root of the D/P
If the steam pressure input for density-compensated flow instrument fails high, the associated
flow rate indication will? correct answers increase, because the density in out has Increase.
A pump has a suction head of 40 feet, it discharges into a DA tank 35 ft above the centerline of
the pump against a friction head of 18 feet, the pressure on the DA tank is 30psi, what is the total
head on the pump? correct answers 82 feet
A boiler feed pump has a discharge pressure of 200 psig and delivers water weighting 62.3 lbs/cu
at 1250 gal/min at rated load, if the mechanical efficiency of the pump is 85% and the suction
head is neglected, calculate the hydraulic or water horsepower required and the motor
horsepower needed to drive the pump. correct answers 143.9
Given three 10,000 KW turbines operate at 250 psi with 28" vacuum, a water rate 9lbs/kw and an
assumed boiler efficiency of 80%. What would be the capacity of the feed water pump?what's
the plant efficiency? What's the coal consumption rate if the heat content is 14,000. Btu/lb?
correct answers The Feed water capacity is 180 Gpm, plant efficiency is 26.8% and the coal
burned is 90.804 Lbs/Hr
What situation can occur if the piping to the inlet valve on an externally Installed water feeding
device is not hooked up (tied-IN) correctly? correct answers Its possible that with an improper
piping tie-in you could have the water inlet valve feed water into the boiler through the float
chamber or its connection to the boiler.
What's the shaft horsepower and torque of a pump running at 1,735 Rpm, 150ft head, 10psi
suction pressure, 6,000 gpm flow and 80% Efficiency? correct answers The shaft horsepower 3.5
HP, the torque is 19.0ft-lb
, Assuming zero head loss in this section of pipe, how will the detectors be affected if tap D
ruptures? correct answers Detectors indications will not change.
If the tank bellow contains 30 ft la f water at 60f, what's the approximate D/P sensed by the
detector? Refer to the drawing? correct answers 13 Psid
A boiler feed pump has a discharge pressure of 270 psi gauge and delivers water of 62,3lb/cu ft
at 250 gal/min at the rated load, if the mechanical efficiency of the pump is 85% and the suction
head is neglected, calculate the hydraulic (water) HP required? correct answers 197 Hp
Which statement identifies the reason why tubes in a water-tube boiler are parallel? correct
answers Arrangement is in parallel to reduce pressure losses and to obtain control of the steam
quality.
The frequency of a generating turbine can be calculated by what formula? correct answers F =
PxRpm / 120
The purpose of a surface condenser as used in steam generation is to: correct answers Reduce the
condensing turbine back-pressure to the Lowes practical ABSOLUTE PRESSURE
Regenerative feed water HEATING uses a reheater. What's the function of the reheater? correct
answers It reheats steam from an EXHAUST STAGE of a high pressure turbine for supplying an
intermediate pressure Turbine.
What formula is used to determine Gallons of cooling water required to condense a given
quantity of steam in a surface condenser? correct answers Q = 500 x ( T2 - T1 )
For a large steam turbine, what device is used during warm-up and cooling off to keep the rotor
at uniform circumferential temp. So as to maintain straightness and preserve rotor BALANCE?
correct answers The Rotor ECCENTRICITY CONTROL
FLow detector measure flow using the principle that flow rate is? correct answers Directly
proportional to the square root of the D/P
If the steam pressure input for density-compensated flow instrument fails high, the associated
flow rate indication will? correct answers increase, because the density in out has Increase.
A pump has a suction head of 40 feet, it discharges into a DA tank 35 ft above the centerline of
the pump against a friction head of 18 feet, the pressure on the DA tank is 30psi, what is the total
head on the pump? correct answers 82 feet
A boiler feed pump has a discharge pressure of 200 psig and delivers water weighting 62.3 lbs/cu
at 1250 gal/min at rated load, if the mechanical efficiency of the pump is 85% and the suction
head is neglected, calculate the hydraulic or water horsepower required and the motor
horsepower needed to drive the pump. correct answers 143.9
Given three 10,000 KW turbines operate at 250 psi with 28" vacuum, a water rate 9lbs/kw and an
assumed boiler efficiency of 80%. What would be the capacity of the feed water pump?what's
the plant efficiency? What's the coal consumption rate if the heat content is 14,000. Btu/lb?
correct answers The Feed water capacity is 180 Gpm, plant efficiency is 26.8% and the coal
burned is 90.804 Lbs/Hr
What situation can occur if the piping to the inlet valve on an externally Installed water feeding
device is not hooked up (tied-IN) correctly? correct answers Its possible that with an improper
piping tie-in you could have the water inlet valve feed water into the boiler through the float
chamber or its connection to the boiler.
What's the shaft horsepower and torque of a pump running at 1,735 Rpm, 150ft head, 10psi
suction pressure, 6,000 gpm flow and 80% Efficiency? correct answers The shaft horsepower 3.5
HP, the torque is 19.0ft-lb
, Assuming zero head loss in this section of pipe, how will the detectors be affected if tap D
ruptures? correct answers Detectors indications will not change.
If the tank bellow contains 30 ft la f water at 60f, what's the approximate D/P sensed by the
detector? Refer to the drawing? correct answers 13 Psid
A boiler feed pump has a discharge pressure of 270 psi gauge and delivers water of 62,3lb/cu ft
at 250 gal/min at the rated load, if the mechanical efficiency of the pump is 85% and the suction
head is neglected, calculate the hydraulic (water) HP required? correct answers 197 Hp
Which statement identifies the reason why tubes in a water-tube boiler are parallel? correct
answers Arrangement is in parallel to reduce pressure losses and to obtain control of the steam
quality.
The frequency of a generating turbine can be calculated by what formula? correct answers F =
PxRpm / 120
The purpose of a surface condenser as used in steam generation is to: correct answers Reduce the
condensing turbine back-pressure to the Lowes practical ABSOLUTE PRESSURE
Regenerative feed water HEATING uses a reheater. What's the function of the reheater? correct
answers It reheats steam from an EXHAUST STAGE of a high pressure turbine for supplying an
intermediate pressure Turbine.
What formula is used to determine Gallons of cooling water required to condense a given
quantity of steam in a surface condenser? correct answers Q = 500 x ( T2 - T1 )
For a large steam turbine, what device is used during warm-up and cooling off to keep the rotor
at uniform circumferential temp. So as to maintain straightness and preserve rotor BALANCE?
correct answers The Rotor ECCENTRICITY CONTROL
