Energy Generation Knowledge Quiz
Energy Generation Knowledge Quiz
Test your knowledge about energy generation with our comprehensive quiz! This quiz consists of 59 multiple-choice questions that cover different aspects of power plants, conversion processes, and related concepts.
Whether you're a student, a professional in the field, or just someone curious about energy systems, this quiz is designed for you. Engage with topics such as:
- Types of power stations
- Energy conversion processes
- Efficiency and cost analysis
- Power factor and reactive power
Which of the following generation station has minimum running cost?
Thermal power station
Hydro-electric power station
Nuclear power station
None of these
Wind energy
Is clean, almost free and domestically produced
Has higher cost comparatively
Develops power proportional to the power of the wind
All of these
The alternator is used in power plants which converts.......
Electrical Energy into Mechanical Energy
Electrical energy into Solar Energy
Mechanical Energy into Electrical Energy
Mechanical Energy into Nuclear Energy
Minimum quantity of fuel is required for the following station:
Thermal power plant
Nuclear power plant
Hydroelectric power plant
Diesel power plant
An alternator coupled to a------ runs at slow speed, as compared to the other types of prime mover
Diesel engine
Hydraulic turbine
Steam turbine
Gas turbine
A pilot exciter (brushless exciter) is provided on generator for the following reasons:
To excite the poles of main exciter (rotor)
To provide requisite starting torque to main exciter
To provide requisite starting torque to generator
None of the above
The power of the generator and the alternator and transformer is usually rated in
kW
kVAR
kWh
kVA
-------Can generate power at unpredictable or uncontrolled times,
Solar power plant
Tidal power plant
Wind power plant
Any of the above
------is almost inevitably used as base load plant (high power plant)
Diesel engine plant
Gas turbine plant
Nuclear power plant
Pumped storage plant
In ______ fuel transportation cost is least.
Nuclear power plants
Diesel generating plants
Steam power stations
None of the above
Which of the following power plants need the least periodfor installation?
Thermal power plant
Diesel power plant
Nuclear power plant
Hydro-electric power plant
Following power plant has instant starting
Nuclear power plant.
Hydro power plant
Diesel power plant
Both (B) and (C).
Different generating stations use the following prime movers
Diesel engine
Hydraulic turbine
Gas turbine
Any of the above
Reactive power is expressed in?
Watts (W)
Volt Amperes Reactive (VAR)
Volt Ampere (VA
No units
The power factor is the ratio of ________ power to the ______ power.
Average (active or real), apparent
Apparent, reactive
Reactive, average
Apparent, average (active or real)
Power factor is the ratio of
Active power to the reactive power
Active power to the apparent power.
Apparent power to the active power.
Reactive power to the apparent power
In a circuit having leading power factor, current waveform leads the voltage waveform:
True
False
The power factor at resonance in R-L-C parallel circuit is
Zero
0.08 lagging
0.8 leading
Unity
As the speed of the alternator increase
The frequency decreases
Frequency increases
Frequency remain constant and power factor decrease
None of the above
Magnetisation curve for the synchronous generator represents the relationship between:
Excitation current and terminal voltage
Power factor and terminal voltage
Magnetic flux and armature current
Reactive and non-reactive components of voltages
Synchronous generator is also known as:
Degenerator
Alternator
Decoupler
Magnetostat
Rotor winding of alternator is also known as
Field winding
Armature winding
Protruding winding
Nonsalient winding
The type of alternator field winding poles on the rotor used in hydropower stations:
Turbo
Salient pole
Non-salient
Any of the above
Practically, most of the alternators prefer which type of construction?
Rotating field type.
Rotating armature type.
Both are equally important.
None of these.
Stator winding in alternator is also known as
Field winding.
Armature Winding.
Protruding winding.
None of these.
How is the hydro-generator driven by
Water turbine
Steam turbine
Internal combustion engines
control of reactive power networks
Lamination of the transformer core is made of:
Cast Iron
Silicon Steel
Aluminum
Cast Steel
The ----- change before and after the transformer
Current
Voltage & current
Frequency
Voltage
Transformer core are laminated in order to:
Reduce hysteresis losses
Reduce hysteresis & eddy current losses
Minimize eddy current losses
Copper losses
Which of the following losses varies with the load in the transformer?
Iron loss
Copper loss
Both core & copper loss
None of the above
A transformer has negative voltage regulation when its load power factor is
Lagging
Leading
Unity
None of the above
Which of the following loss in a transformer is zero even at full load
Eddy current loss
Core loss
Copper loss
Friction loss
Which winding in a transformer has more number of turns?
Secondary winding
Primary winding
High voltage winding
Low voltage winding
Power in a Three Phase Circuit = ------
P = 3 VPh IPh CosФ
P = √3 VL IL CosФ
Both A & B.
None of The Above
polyphase system is generated by______?
Having two or more generator windings separated byequal electrical angle.
Having generator windings at equal distances
None of the above
A and B.
In a three phase AC circuit, the sum of all three generated voltages is _______?
Infinite (∞)
Zero (0)
One (1)
None of the above
In a three phase, delta connection------
Line current is equal to phase current
Line voltage is equal to phase voltage
None of the above
Line voltage and line current is zero
In a balanced three-phase system-delta load, if we assume the line voltage is Vab = V angle 0^o as a reference phasor. Then the source voltage Vbc is?
V angle 0^o
V angle -120^o
V angle 120^o
V angle 240^o
The expression of reactive power is?
Veff*Im*sinθ
Vm*Im*sinθ
Veff*Ieff*sinθ
Vm*Ieff*sinθ
The a.c. The armature winding of an alternator is
Delta Star connected
Generally Delta Connected
Star Delta Connected
Always Star connected
The output frequency of an alternator depends on
Type of winding
Number of poles and Rotational speed
Numbers of poles only
Rotational speed only
Which type of rotor is best for a turbo-alternator?
Salient pole type
Cylindrical rotor type
Salient pole & Cylindrical rotor
Non-salient pole type
Which of the following rule is used to determine the direction of rotation of D.C motor?
Coloumb’s Law
Lenz’s Law
Fleming’s Right-hand Rule
Fleming’s Left-hand Rule
In which of the following application DC series motor is used?
Centrifugal Pump
Motor Operation in DC and AC
Water pump drive
Starter for car
Nowadays DC motor is widely used in
Electric Traction
Air compressor
Centrifugal Pump
Machine shop
Which of the following DC motor have the tendency of load instablity?
Cumulative compound motor
Shunt Motor
Series motor
Differentially compound motor
Which DC motor is preferred for Elevator?
Seperate excited motor
Series motor
Shunt Motor
compound motor
Which DC motor is preferred for constant speed?
Series motor
Compound motor
Shunt motor
Differential motor
Which DC motor is preferred for crane and hoist?
Series motor
Cumulative compound motor
Shunt motor
Differentially compound motor
The speed of synchronous motor:
Increases as the load increases
Decreases as the load decreases
Always remains constant
None of the above
In which of the following motors the stator and rotor magnetic fields rotate at the same speed:
Universal motor
Synchronous motor
Induction motor
Reluctance motor
An induction motor is analogous to
Auto-transformer
Two windings transformer with secondary short circuited
Two windings transformer with secondary open circuited
Synchronous motor
Induction motors have the advantage of
Less Maintenace
Less cost
Simple in construction
All of the above
The electric motor generally used in computer printer driver is
Reluctance motor
Hysteresis motor
Universal motor
Stepper motor
The power of the Motors are rated in:
KW
KVA
KVAr
KWh
A switched reluctance motor differs from a VR stepper motor in the sense that it
Has rotor poles of ferromagnetic material
Rotates continuously
Is designed for open loop operation only
Has lower efficiency.
Which of the following applications make use of a universal motor
Portable tools
Lathe machines
Oil expeller
Floor polishing machine
A universal motor is one which
Is available universally
Can be marketed internationally
Can be operated either on dc or ac supply
Runs at dangerously high speed on no-load
Speed of the universal motor is
Dependent on frequency of supply
Proportional to frequency of supply
Independent of frequency of supply
None of the above
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