Sample questions

1. Text Correct Option1 Option2 Option3
Efficiency of cooling tower effects 3 Condenser vacuum Unit Heat Rate Both
C W Operating pr in Kg/cm2 4 3 4 5
In Induced draft cooling tower, fan is situated at cooling tower 2 Inlet outlet Both
1 Deg C rise in cooling water temp, reduce condenser vacuumin 2 10mm 5mm 20mm
Natural draft cooling tower has------fans 3 1 2 nil
Drift in cooling tower ranges from 2 0.01-.05% 0.05-0.3% 0.09-1.3%
Range in cooling tower is 1 T in-Tout Tout-Tin Tin - Air WBT
Approach in cooling tower is 1 Tout-Air WBT Tin-Air WBT Both
COC of CWwater is dis solid in----- 2 makeup water/ circulating water circulating water/ Blow down/ makeup
Where abundant quantity of water is available, we use-------cw 1 Once through Cooling tower Both
Air flow is more in---- 2 Reciprocating Compressor Centrifugal Both
Air drier is used in 2 Plant air Instrument air Both
Instrument Air pressure range is 1 6-12 KG 12-18 KG 18-24 KG
In 500 MWUnit, for CO2 purging we use 2 Plant air Instrument air Seal air
LDO atomisation in boiler is done by 2 Instrument air Plant air Both
Problemencountered with compressed air system 4 Systemleakage Loading /Unloading Ambient temp
Cooling tower effectiveness is 1 Range/(Range +Approach) Approach/(Range WBT/(Range
Cooling tower upper shell empty----- 4 55-60 % 65-70 % 75-80 %
…........ is used in H2 cell as electrolyte in H2 plant 3 (25-30 %)KOH (25-30 (25-30 %)KOH+ DM
The temperature rise of …........ Indicates that there is air ingress 2 Catalytic analyser Catalytic purifier Catalytic Converter
Hydrogen gas in H2 cell evolve at …........ 1 Cathode Anode both 1&2
Purpose of H2 Gas holder is to …....... 4 to remove the moisture fromthe H2 venting the H2 gas Pressurise the H2 gas
There are …. Nos of FO storage tanks for St-1 & …..... Nos of fuel 1 6,2 2,6 6,6
LWTP stands for …....... 3 LIQUID WASTE TREATMENT PUMP LIQUID WASTE LIQUID WASTE
There are ….. Nos of Electric fire pumps & ….....Nos of Diesel fire 3 3,4 4,3 4,4
AWRS stands for…...... 3 ASH WASTE RECLAIMSYSTEM ASH WASTE ASH WATER
Based upon what parameters sensors will be chosen_ _ _ _ _ 4 Environmental factors Economic factor Static characteristics
HP Bypass will not open in case. 1 Condenser vacuum is low Temperature Condenser vacuumis
HP Bypass will fast open in case 1 Turbine trip Temperature Condenser vacuum is high
Capacity of HP Bypass is 1 70% HP steamat rated flow 50% HP steam at rated 80% HP steam at rated
HP Bypass will open if pressure ahead of bypass valve 1 increases by about 5 to 8 kg/sq.cm. increases more the is less than turbine throttle
Spray water for HP bypass spray is tapped from 1 BFP discharge CEP discharge HRH
Spray water for LP bypass spray is tapped from 2 BFP discharge CEP discharge HRH

2. LP Bypass bypasses 4 HP Turbine IP Turbine LP Turbine
LP Bypass maintains pressure 1 After reheater Before reheater MS pressure
Variable set point for LP Bypass are derived from 1 HP first stage pressure MS pressure HRH pressure
ATRS Stand for 2 Automatic turbine roll up system Automatic turbine Auto turbine roll up system
Structure of ATRS is 1 GC-SGC-SLC-CI GC-GC SGC-SLC
The algebriac diffecernce between the upper and lower range values 2 Dead band Span Range
The degree to which the output of an instrument approaches an 3 Linearity Confirmity Accuracy
What is the purpose of the orifice plate in the flow measuring 1 To create a differential pressure To change the level of To stop the flow of the
The typical measurement technique used for drum level measurement 1 DP method floats and liquid Direct viewing scale
Flow is----------function of Differential pressure 4 Linear logarithmic parabolic
Which is not the temperature input for TSE ? 4 Emergency Stop Valve HP Control Valve HP Turbine Casing
Which is not the input components of TSE ? 2 LOAD Frequency Speed
How many trip solenoids are there in 500 MWUnits ? 2 1 2 3
RTS in Power Plant stands for ? 3 Remote Terminal Service Remote Trip Service Remote Trip Solenoid
Which is not the part of ATT of protection devices ? 4 Low Vacuum Thrust bearing trip Overspeed
ATT of Turbine Stop valves and control valves is conducted at ? 1 Partial load Full Load None of the above
TSE Stands for ? 2 Trip Stress evaluator Turbine Stress Thermal Stress
Droop characteristic in turbine governing related with 3 Load vs Voltage Frequency vs speed Load vs Frequency
How governor works in steam turbine operation 2 Governor Control voltage to regulate Governor adjusts Governor adjust
Steamflow is controlled by sequencial opening of control valve 3 Throttle governing Advance Throttle Nozzle governing
Fromefficiency point of view, which steampressure mode is 2 Variable pressure mode Constant pressure Combination of both
During transient speed rise when load throw-off, what is the 1 5 to 7% of rated speed 2-3% of rated speed 10-15% of rated speed
In KWU turbine when EHC is in service, hydraulic governor 3 25% 50% 100%
Problemof fan blade corrosion is more in 3 Forced draft cooling tower Natural draft cooling Induced draft cooling
In CT circuit, CWmake up water is given at-- 2 CT inlet CT outlet Condenser outlet
For LDO atomisation in boiler,-----------is used. 2 Instrument Air Plant Air Steam
Permissible evaporation loss in Cooling Tower is-------- 4 5% 7% 2.80%
Power plant efficiency for a supercritical power plant is 4 38% 39% 37%
Furnace design in a Supercritical Boiler is 3 vertical only spiral only vertical+spiral
Furnace Tubes fromSubcritical to Supercritical are made more 1 Cr Ni Mb
At super critical point condtition of water and steamphase 2 Can be identified clearly Not separable All of the above
Water-vapour Critical pressure is 4 224.936 kgf/cm2 217.75 ata 22060 kPa
At the critical point of water-vapour, latent heat is 3 600 Kcal/kg 450 Kcal/kg Zero Kcal/kg
Thermal efficiency of super critical cycle efficiency in 2 less more can not say

3. Main challenge of super critical technology is 1 Oxydation/ failure of material at Designing of high Welding of tube joints
In Supercritical boilers, CO2 emission in comparission to sub- 2 increases decreases can not say
Specific Coal consumption in a Supercritical Boiler is 2 More less same
UPS is Used to provide 1 240V 1 Ph AC Supply 240V DC Supply 240V 3 Ph AC Supply
full formof AI module is 2 Analog integartion Analog input Artificial intelligence
Servers and Work stations requires ---supply 1 240V 1 Ph AC Supply 240V DC Supply 240V 3 Ph AC Supply
History is stored on 1 Server OWS LVS
To operate a damper in the 0-100 % range we require 2 AI Card AO Card DI Card
To fetch status of motor we require 3 AI Card AO Card DI Card
For giving start command for a motor---- card is used. 4 AI Card AO Card DI Card
For getting reading of pressure transmitter ---card is required 1 AI Card AO Card DI Card
Time Synchronization is achieved through 3 Severs OWS GPS
Bearing Vibration of turbine is measured by 2 Proximity Probe Velocity Pick up Accelerometer
Generally H direction of vibration is measured on 1 Foundation Structures Both 1 and 2
Physical signifance of Displacement vibration amplitude is 1 Strain Indicator Fatigue Indicator Force Indicator
Physical signifance of Velocity vibration amplitude is 2 Strain Indicator Fatigue Indicator Force Indicator
Physical signifance of Acceleration vibration amplitude is 3 Strain Indicator Fatigue Indicator Force Indicator
Units of Displacemnt vibraion is 3 mm/s² mm/s micron
To analyse vibration of machnie we require 4 Amplitude Frequency Phase
Rotor expansion is measured at 4 HP Front IP Rear LP Rear
Manometer is used for 2 Mediumpressure Low pressure High Pressure
Head type flow meter is 4 Orifice plate Rotameters Venturi tubes
Generally V direction of vibration is measured on 2 Foundation Structures Both 1 and 2

31. Option4
None
1
None
15mm
4
1-2%
None
None
None
None
None
None
24-30 KG
None
None
All
All
85-90 %
(25-30 %)NaOH+WATER
Catalytic rectifier
anode & partially at
store the H2 gas before
2,2
LIQUID WATER
3,3
NONE OF THE THREE
All the above
Condenser wall
Condenser wall
90% HP steam at rated
Doesn’t depend on turbine
th ttl
CRH
CRH

32. LP and IP Turbine
CRH pressure
CRH pressure
Auto turbine run up
SLC-CI
Accuracy
Sensitivity
To change the
None
square root
IP Turbine Casing
Temperature
4
Restore Trip Service
Stop valves
Both 1 and 2
Trip solenoid in
All of these
None of these
None of these
None of these
None of these
None of these
All of these
None of these
All of these
1.80%
42%
austenite
None of the above
All of the above
None of the above
None of the above

33. None of the above
None of the above
None
24V DC Supply
Artificial integration
24V DC Supply
SWITCH
DO Card
DO Card
DO Card
DO Card
SWITCH
Spike Energy
None
None
None
None
G
All of above
All of above
Very high pressure
All of above
None

91. PPF-1 Singrauli