3b2 Exam Questions With Complete Solutions
_____ is/are mixed with the effluent of the wastewater heater to
help breakdown the organic materials in the flow.
Select one:
a. Activated sludge.
b. Activated chemicals.
c. Oils.
d. Polishing chemicals.
e. Steam. Correct Answers a
A _____ system has the electrical supply from the utility grid
fixed and the cogeneration system looks after changing electrical
requirements.
Select one:
a. Home based
b. Base Loaded
c. Set electrical demand
d. Constant based
e. Demand based Correct Answers c
A Eutectic salt solution used as a heat transfer medium in an
indirect heater is a mixture of:
Select one:
a. Sodium nitrate and magnesium nitrate
b. Calcium nitrate and magnesium nitrate
c. Sodium nitrate and calcium nitrate
d. Sodium nitrite and potassium nitrate
e. Calcium nitrate and potassium nitrate Correct Answers d
,A gas turbine operates with an outside air temperature of 40
degrees Celsius, and a relative humidity of 10%. If the outside
air temperature was -5 degrees Celsius with a relative humidity
of 65%, this gas turbine
Select one:
a. will produce less NOx
b. will develop more power
c. must operate its anti-icing system
d. will be less efficient Correct Answers b
A gas turbine operates with an outside air temperature of 40
degrees Celsius, and a relative humidity of 10%. If the outside
air temperature was -5 degrees Celsius with a relative humidity
of 65%, this gas turbine
Select one:
a. will produce less NOx
b. will develop more power
c. must operate its anti-icing system
d. will be less efficient Correct Answers b
A gas turbine starting device
Select one:
a. is necessary for all gas turbines
b. must be an electric motor
c. keeps spinning the turbine shaft until the turbine is up to full
load
d. is also referred to as the "turning gear." Correct Answers a
A jacking oil pump is used to:
Make slight adjustments to the turbine bearing housings during
overhaul to maintain alignment.
,Supply oil under the shaft of the bearing for a specific time.
Supply oil to the bearings under the shaft at all times so
lubrication is assured.
Supply a low volume of oil at high pressure.
Select one:
a. 1, 2, 3
b. 2, 3, 4
c. 1, 3, 4
d. 3, 4
e. 2, 4 Correct Answers e
A mechanical overspeed trip is designed to _____ in the event of
an overspeed condition.
Select one:
a. Prevent the turbine's speed from exceeding 150% of its rated
speed
b. Activate an alarm
c. Drop the turbine's load
d. Shut off the turbine's steam supply
e. Throttle the inlet steam Correct Answers d
A natural gas fired gas turbine would likely require natural gas
pressurized to
Select one:
a. 4000 kPa
b. 400 kPa
c. 40 kPa
d. 5 to 10 psig Correct Answers a
A rotating biological contactors main purpose is to reduce the
_____ of the wastewater.
, Select one:
a. Temperature value.
b. Turbidity.
c. Toxicity.
d. Biochemical oxygen demand value.
e. pH value. Correct Answers d
A rotating trash screen used in a wastewater treatment plant is
also called a:
Select one:
a. Comminuter.
b. Compactor.
c. Constrictor.
d. Accumulater.
e. Barminutor. Correct Answers a
A simple mechanical governor uses a _____ attached to the end
of the turbine shaft.
Select one:
a. Governor
b. Speed pickup
c. Set of weights
d. Gear
e. Pressure sensor Correct Answers c
A two stroke engine has a power stroke every:
Select one:
a. Two crank shaft revolutions
b. Four crank shaft revolutions
c. One crank shaft revolution
d. One half crank shaft revolution
_____ is/are mixed with the effluent of the wastewater heater to
help breakdown the organic materials in the flow.
Select one:
a. Activated sludge.
b. Activated chemicals.
c. Oils.
d. Polishing chemicals.
e. Steam. Correct Answers a
A _____ system has the electrical supply from the utility grid
fixed and the cogeneration system looks after changing electrical
requirements.
Select one:
a. Home based
b. Base Loaded
c. Set electrical demand
d. Constant based
e. Demand based Correct Answers c
A Eutectic salt solution used as a heat transfer medium in an
indirect heater is a mixture of:
Select one:
a. Sodium nitrate and magnesium nitrate
b. Calcium nitrate and magnesium nitrate
c. Sodium nitrate and calcium nitrate
d. Sodium nitrite and potassium nitrate
e. Calcium nitrate and potassium nitrate Correct Answers d
,A gas turbine operates with an outside air temperature of 40
degrees Celsius, and a relative humidity of 10%. If the outside
air temperature was -5 degrees Celsius with a relative humidity
of 65%, this gas turbine
Select one:
a. will produce less NOx
b. will develop more power
c. must operate its anti-icing system
d. will be less efficient Correct Answers b
A gas turbine operates with an outside air temperature of 40
degrees Celsius, and a relative humidity of 10%. If the outside
air temperature was -5 degrees Celsius with a relative humidity
of 65%, this gas turbine
Select one:
a. will produce less NOx
b. will develop more power
c. must operate its anti-icing system
d. will be less efficient Correct Answers b
A gas turbine starting device
Select one:
a. is necessary for all gas turbines
b. must be an electric motor
c. keeps spinning the turbine shaft until the turbine is up to full
load
d. is also referred to as the "turning gear." Correct Answers a
A jacking oil pump is used to:
Make slight adjustments to the turbine bearing housings during
overhaul to maintain alignment.
,Supply oil under the shaft of the bearing for a specific time.
Supply oil to the bearings under the shaft at all times so
lubrication is assured.
Supply a low volume of oil at high pressure.
Select one:
a. 1, 2, 3
b. 2, 3, 4
c. 1, 3, 4
d. 3, 4
e. 2, 4 Correct Answers e
A mechanical overspeed trip is designed to _____ in the event of
an overspeed condition.
Select one:
a. Prevent the turbine's speed from exceeding 150% of its rated
speed
b. Activate an alarm
c. Drop the turbine's load
d. Shut off the turbine's steam supply
e. Throttle the inlet steam Correct Answers d
A natural gas fired gas turbine would likely require natural gas
pressurized to
Select one:
a. 4000 kPa
b. 400 kPa
c. 40 kPa
d. 5 to 10 psig Correct Answers a
A rotating biological contactors main purpose is to reduce the
_____ of the wastewater.
, Select one:
a. Temperature value.
b. Turbidity.
c. Toxicity.
d. Biochemical oxygen demand value.
e. pH value. Correct Answers d
A rotating trash screen used in a wastewater treatment plant is
also called a:
Select one:
a. Comminuter.
b. Compactor.
c. Constrictor.
d. Accumulater.
e. Barminutor. Correct Answers a
A simple mechanical governor uses a _____ attached to the end
of the turbine shaft.
Select one:
a. Governor
b. Speed pickup
c. Set of weights
d. Gear
e. Pressure sensor Correct Answers c
A two stroke engine has a power stroke every:
Select one:
a. Two crank shaft revolutions
b. Four crank shaft revolutions
c. One crank shaft revolution
d. One half crank shaft revolution
