3B2 - Test (I) Questions And Full Set
Correct Solutions
- Ans--4000 kPa
_____ compressors require intake and discharge valves. - Ans--
Reciprocating
_____ is well known for its contribution to the greenhouse effect. - Ans--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. -
Ans--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: - Ans--
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 - Ans--1, 4
A capillary tube is mainly used on: - Ans--Small household systems
A condenser shell may be fitted with an expansion joint if the: - Ans--
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: - Ans--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 - Ans--will
develop more power
A gas turbine starting device - Ans--is necessary for all gas turbines
A high condensate level in a condenser: - Ans--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. - Ans--2, 4
A mechanical overspeed trip is designed to _____ in the event of an
overspeed condition. - Ans--Shut off the turbine's steam supply
A natural gas fired gas turbine would likely require natural gas pressurized to
- Ans--
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 - Ans--1, 2, 3, 4
A pressure, limiting device will: - Ans--Stop the compressor before the relief
valves lift
A rotating trash screen used in a wastewater treatment plant is also called a:
- Ans--Comminuter.
A simple condenser with low installation cost would be: - Ans--Air-cooled
, A thrust adjusting gear: - Ans--Positions the turbine rotor axially
A topping turbine is a special application of a _____ turbine: - Ans--Back-
pressure
A typical air dryer type consists of a pressure vessel containing a chemical
known as a: - Ans--Desiccant
Absorption type refrigeration systems require: - Ans--More space than
compression systems
Advantages of gas turbines intakes are:
1. Remove contaminants
2. Prevent damage from foreign objects
3. Allow addition of special cooling systems
4. Smooth air flow into the compressor
5. Decrease the velocity of the incoming air - Ans--1, 2, 3, 4
Aero-derivative gas turbines normally use _____ bearings: - Ans--
Antifriction
Air compressor intercoolers and after coolers may be: - Ans--Water or air
cooled
Air flow to each individual burner for a fired heater is controlled by a/an: -
Ans--Air register
Ammonia leaks can be located by: - Ans--A litmus paper test
An aerobic material is one that has: - Ans--Dissolved oxygen.
An air receiver is a pressure vessel which is used:
1. As a reservoir
2. To dampen pulsation of reciprocating compressor
3. To allow moisture and oil particles to settle out from the air - Ans--1, 2, 3
An electronic-hydraulic governor system uses: - Ans--A separate fluid
power unit for high pressure oil
Correct Solutions
- Ans--4000 kPa
_____ compressors require intake and discharge valves. - Ans--
Reciprocating
_____ is well known for its contribution to the greenhouse effect. - Ans--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. -
Ans--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: - Ans--
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 - Ans--1, 4
A capillary tube is mainly used on: - Ans--Small household systems
A condenser shell may be fitted with an expansion joint if the: - Ans--
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: - Ans--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 - Ans--will
develop more power
A gas turbine starting device - Ans--is necessary for all gas turbines
A high condensate level in a condenser: - Ans--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. - Ans--2, 4
A mechanical overspeed trip is designed to _____ in the event of an
overspeed condition. - Ans--Shut off the turbine's steam supply
A natural gas fired gas turbine would likely require natural gas pressurized to
- Ans--
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 - Ans--1, 2, 3, 4
A pressure, limiting device will: - Ans--Stop the compressor before the relief
valves lift
A rotating trash screen used in a wastewater treatment plant is also called a:
- Ans--Comminuter.
A simple condenser with low installation cost would be: - Ans--Air-cooled
, A thrust adjusting gear: - Ans--Positions the turbine rotor axially
A topping turbine is a special application of a _____ turbine: - Ans--Back-
pressure
A typical air dryer type consists of a pressure vessel containing a chemical
known as a: - Ans--Desiccant
Absorption type refrigeration systems require: - Ans--More space than
compression systems
Advantages of gas turbines intakes are:
1. Remove contaminants
2. Prevent damage from foreign objects
3. Allow addition of special cooling systems
4. Smooth air flow into the compressor
5. Decrease the velocity of the incoming air - Ans--1, 2, 3, 4
Aero-derivative gas turbines normally use _____ bearings: - Ans--
Antifriction
Air compressor intercoolers and after coolers may be: - Ans--Water or air
cooled
Air flow to each individual burner for a fired heater is controlled by a/an: -
Ans--Air register
Ammonia leaks can be located by: - Ans--A litmus paper test
An aerobic material is one that has: - Ans--Dissolved oxygen.
An air receiver is a pressure vessel which is used:
1. As a reservoir
2. To dampen pulsation of reciprocating compressor
3. To allow moisture and oil particles to settle out from the air - Ans--1, 2, 3
An electronic-hydraulic governor system uses: - Ans--A separate fluid
power unit for high pressure oil
