3B2 - Test (I) Questions With Complete Solutions
_____ compressors require intake and discharge valves. Correct
Answers Reciprocating
_____ is well known for its contribution to the greenhouse
effect. Correct Answers CO2
_____ on centrifugal air compressors are provided in order to
control the amount of air flowing to the impeller and thus
control the capacity of the unit. Correct Answers Adjustable
inlet vanes
A back-pressure turbine with exhaust steam going to an old
boiler header that is supplying steam to an old lower pressure
turbine is called a: Correct Answers Topping turbine
A barring gear consists of an electric motor and several sets of
reducing gears to turn the turbine shaft at a low speed. It is used:
1. After stopping a hot turbine to prevent "hogging"
2. Only on small turbine
3. Continually when the turbine is not operating
4. For several hours prior to startup Correct Answers 1, 4
A capillary tube is mainly used on: Correct Answers Small
household systems
A condenser shell may be fitted with an expansion joint if the:
Correct Answers Condenser tubes are expanded into the tube
sheets
,A Eutectic salt solution used as a heat transfer medium in an
indirect heater is a mixture of: Correct Answers Sodium nitrite
and potassium nitrate
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 Correct Answers will develop more
power
A gas turbine starting device Correct Answers is necessary for
all gas turbines
A high condensate level in a condenser: Correct Answers Could
cause non-condensable gases to accumulate in the condenser
A jacking oil pump is used to:
1. Make slight adjustments to the turbine bearing housings
during overhaul to maintain alignment.
2. Supply oil under the shaft of the bearing for a specific time.
3. Supply oil to the bearings under the shaft at all times so
lubrication is assured.
4. Supply a low volume of oil at high pressure. Correct Answers
2, 4
A mechanical overspeed trip is designed to _____ in the event of
an overspeed condition. Correct Answers Shut off the turbine's
steam supply
, A natural gas fired gas turbine would likely require natural gas
pressurized to Correct Answers
A pressure-velocity compounded turbine may have:
1. Two velocity-compounded stages
2. One velocity-compounded stages
3. Several pressure-compounded stages
4. Pressure and velocity-compounded stages Correct Answers 1,
2, 3, 4
A pressure, limiting device will: Correct Answers Stop the
compressor before the relief valves lift
A rotating trash screen used in a wastewater treatment plant is
also called a: Correct Answers Comminuter.
A simple condenser with low installation cost would be: Correct
Answers Air-cooled
A thrust adjusting gear: Correct Answers Positions the turbine
rotor axially
A topping turbine is a special application of a _____ turbine:
Correct Answers Back-pressure
A typical air dryer type consists of a pressure vessel containing a
chemical known as a: Correct Answers Desiccant
Absorption type refrigeration systems require: Correct Answers
More space than compression systems
_____ compressors require intake and discharge valves. Correct
Answers Reciprocating
_____ is well known for its contribution to the greenhouse
effect. Correct Answers CO2
_____ on centrifugal air compressors are provided in order to
control the amount of air flowing to the impeller and thus
control the capacity of the unit. Correct Answers Adjustable
inlet vanes
A back-pressure turbine with exhaust steam going to an old
boiler header that is supplying steam to an old lower pressure
turbine is called a: Correct Answers Topping turbine
A barring gear consists of an electric motor and several sets of
reducing gears to turn the turbine shaft at a low speed. It is used:
1. After stopping a hot turbine to prevent "hogging"
2. Only on small turbine
3. Continually when the turbine is not operating
4. For several hours prior to startup Correct Answers 1, 4
A capillary tube is mainly used on: Correct Answers Small
household systems
A condenser shell may be fitted with an expansion joint if the:
Correct Answers Condenser tubes are expanded into the tube
sheets
,A Eutectic salt solution used as a heat transfer medium in an
indirect heater is a mixture of: Correct Answers Sodium nitrite
and potassium nitrate
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 Correct Answers will develop more
power
A gas turbine starting device Correct Answers is necessary for
all gas turbines
A high condensate level in a condenser: Correct Answers Could
cause non-condensable gases to accumulate in the condenser
A jacking oil pump is used to:
1. Make slight adjustments to the turbine bearing housings
during overhaul to maintain alignment.
2. Supply oil under the shaft of the bearing for a specific time.
3. Supply oil to the bearings under the shaft at all times so
lubrication is assured.
4. Supply a low volume of oil at high pressure. Correct Answers
2, 4
A mechanical overspeed trip is designed to _____ in the event of
an overspeed condition. Correct Answers Shut off the turbine's
steam supply
, A natural gas fired gas turbine would likely require natural gas
pressurized to Correct Answers
A pressure-velocity compounded turbine may have:
1. Two velocity-compounded stages
2. One velocity-compounded stages
3. Several pressure-compounded stages
4. Pressure and velocity-compounded stages Correct Answers 1,
2, 3, 4
A pressure, limiting device will: Correct Answers Stop the
compressor before the relief valves lift
A rotating trash screen used in a wastewater treatment plant is
also called a: Correct Answers Comminuter.
A simple condenser with low installation cost would be: Correct
Answers Air-cooled
A thrust adjusting gear: Correct Answers Positions the turbine
rotor axially
A topping turbine is a special application of a _____ turbine:
Correct Answers Back-pressure
A typical air dryer type consists of a pressure vessel containing a
chemical known as a: Correct Answers Desiccant
Absorption type refrigeration systems require: Correct Answers
More space than compression systems
