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Steam & Gas Turbines Multiple Choice Questions | MCQs | Quiz

Steam and Gas Turbines Interview Questions and Answers
Practice Steam and Gas Turbines questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Turbine Types
•   Flow Passage Classification
•   Engine & Component - 1
•   Engine & Component - 2
•   Cycle & Fuel Classification1
•   Cycle & Fuel Classification2
•   Combined Power Plant
•   Turbine Advantages
•   Turbine Basics
•   Thermodynamics Basics
•   Carnot & Rankine Cycle - 1
•   Carnot & Rankine Cycle - 2
•   Temperature Effects
•   Efficiencies
•   Heat & Steam rate - 1
•   Heat & Steam Rate - 2
•   Ideal Ericsson Cycle
•   Ideal & Actual Intercooling
•   Reheating Effect
•   Closed Cycles & Media
•   Nozzle Design
•   Critical Pressure Ratio
•   Nozzle Losses
•   Divergence Angles
•   Supersaturated Steam
•   Nozzle Coefficients
•   Flow Passage Design
•   Carry-Over Velocity Effect
•   Radial Equilibrium
•   Airfoil Principle & Limitation
•   Cascade Principle
•   Velocity Ratio Relationship
•   Turbine Rotor
•   Bending Stresses
•   Disk Stresses
•   Shrouding & Lacing Wires
•   Gas Turbine Blade Cooling
•   Casing & Metallurgical
•   Turbine Blade Profile
•   Blade Entrance
•   Impulse Blade Passage
•   Reaction Blade Profiles
•   Blade Angle Width & Height
•   Reaction Blade Passage
•   Radial Equilibrium Flow
•   Free & Forced Vortex
•   Control & Performance
•   Supervisory Instruments
•   Direct Speed Governors
•   Hydraulic Speed Governor
•   Pressure Regulators
•   Speed Regulation
•   Emergency Governors
•   Turbine Performance
•   Initial Pressure
•   Nozzle Governing Effect
•   Parsons Number
•   Automatic Extraction
•   Mixed Pressure Turbine
•   AIEE-ASME Turbine
•   Centrifugal Compressor
•   Energy Transfer Relation
•   Adiabatic Efficiency
•   Compressibility Effect
•   Diffuser & Prewhirl
•   Performance Characteristic
•   Pressure Coefficients
•   Surging
•   Centrifugal Compressors
•   Thermochemistry
•   Entropy & Heat Reaction
•   Flame Temperature
•   Combustion Mechanics
•   Combustion Characteristics
•   The Combustor
•   Combustion Chamber
•   The Regenerator
•   Regenerator Types
•   Regenerator Effectiveness
•   Regenerator Design
•   Power Plant
•   Dimensionless Performance
•   Twin Shaft Plant
•   Aircraft Plants Parameters
•   Torque Characteristics
•   Starting & Performance
•   Elementary Gas Dynamics
•   Elementary Airfoil Theory
•   ↓ Gas Turbines ↓
•   Cryogenics
•   Jet Engines
•   Micro Gas Turbines
•   Fuel Systems
•   Bearing System
•   Combustion System
•   Turbine Casing
•   Compressor Parts
•   Inlet & Compressor Casing
•   Gas Turbine Fuels
•   Steam Turbine Working
•   Fire Resisting Fluids
•   Hydrogen Seal Rings
•   Steam Turbine Cylinders

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Steam and Gas Turbines Questions and Answers – Nozzle Discharge Coefficients and Calculations

Posted on October 27, 2015 by Manish

This set of Steam and Gas Turbines Inteview Questions and Answers for freshers focuses on “Nozzle Discharge Coefficients and Calculations”.

1. Coefficient of discharge is the __________ of Actual discharge to the theoretical discharge.
a) ratio
b) product
c) sum
d) none
View Answer

Answer: a
Explanation: Discharge coefficient is the ratio of actual discharge to the theoretical discharge.
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2. Coefficient of discharge is used to measure ___________
a) none of the mentioned
b) pressure exerted by the nozzle on the fluid
c) flow rate allowed by the nozzle
d) resistance offered by the nozzle
View Answer

Answer: d
Explanation: Coefficient of discharge is used to measure the inaccountable losses of the fluid passing through the nozzle. It is used to measure the resistance exerted by the nozzle.

3. Unit of flow resistance is_________
a) N/m2
b) m2/N
c) KN/Kg
d) No unit
View Answer

Answer: d
Explanation: Flow resistance is a unit less parameter.

4. Coefficient of discharge is the ____________
a) product of coefficient of velocity and coefficient of contraction
b) arithmetic sum of coefficient of velocity and coefficient of contraction
c) ratio of coefficient of velocity and coefficient of contraction
d) none of the mentioned
View Answer

Answer: a
Explanation: Cd = Cc*Cv
Where
Cd = Coefficient of discharge
Cc = Coefficient of contraction
Cv = Coefficient of velocity.

5. Coefficient of discharge is _____________
a) directly proportional to coefficient of discharge
b) inversely proportional to square of the coefficient of discharge
c) inversely proportional to coefficient of discharge
d) directly proportional to square of coefficient of discharge
View Answer

Answer: b
Explanation: Coefficient of resistance is denoted by K and coefficient of discharge is denoted by Cd. Where
K=1/Cd2.
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6. For sharp edge orifice, coefficient of discharge lies between ___________
a) 0.61 – 0.64
b) 0.87 – 0.89
c) 0.50 – 0.61
d) none of the mentioned
View Answer

Answer: a
Explanation: For sharp edges coefficient of discharge lies between 0.61 -0.64.

7. Coefficient of discharge (Cd) can be written as Cd=1/K(0.5).
a) True
b) False
View Answer

Answer: a
Explanation: Coefficient of discharge is inversely proportional to square root of K.

8. In the equation Cd=1/K(0.5) what does K mean ?
a) Pressure drop inside the nozzle
b) Mass flow rate
c) Flow resistance
d) None of the mentioned
View Answer

Answer: c
Explanation: Coefficient of discharge is inversely proportional to square root of flow resistance.

9. Coefficient of discharge is inversely proportional to square root of _______
a) flow resistance
b) pressure drop inside the nozzle
c) none the mentioned
d) both of the mentioned
View Answer

Answer: d
Explanation: Coefficient of discharge can also be written as Cd = m/(density*(pressure drop)*Area)(0.5) or else Cd = 1/K(0.5).

10. Coefficient of discharge is directly proportional to mass flow rate.
a) True
b) False
View Answer

Answer: a
Explanation: When mass flow rate increases coefficient of discharge increases.
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Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.

To practice all areas of Steam and Gas Turbines for interviews, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Facebook | Twitter

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