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Showing posts from July, 2021

### Physiological Transducers multiple choice questions

Physiological Transducers Classification of Transducers 1. Unwanted signal at the output due either to internal sources or to interference is called ________ a) offset b) noise c) drift d) threshold Answer: noise 2. Change is signal over long period of time is called _______ a) noise b) offset c) hysteresis d) drift Answer: drift 3. Accuracy is ______ a) ability of the transducer or sensor to see small differences in reading b) ability of the transducer or sensor to see small differences in reading c) algebraic difference between the indicated value and the true or theoretical value of the measurand d) total operating range of the transducer Answer: algebraic difference between the indicated value and the true or theoretical value of the measurand 4. The ability of the sensor to see small differences in reading is called ______ a) resolution b) drift c) offset d) linearity Answer: resolution 5. Which type of transducer requires energy to be put into it in order to t

### Heat Transfer multiple choice questions

Heat Transfer 1. Units for thermal conductivity a) J/kg.K b) J/mol.K c) J.ohm/sec.K2 d) W/m.K Answer: W/m.K 2. The ratio of energy transferred by convection to that by conduction is called a) Stanton number b) Nusselt number c) Biot number d) Preclet number Answer: Biot number 3. Air at 20° C blows over a plate of 50 cm x 75 cm maintained at 250° C. If the convection heat transfer coefficient is 25 W/m2 °C, the heat transfer rate is a) 215.6 kW b) 2156 kW c) 2.156 kW d) 21.56 Kw Answer: 2.156 kW 4. If the body is at thermal equilibrium, then the a) Emissivity = absorptivity b) Emissivity > absorptivity c) Emissivity < absorptivity d) None of the above Answer: Emissivity = absorptivity 5. The body which absorbs all radiations incident upon it, is called as a) Black body b) White body c) Opaque body d) Transparent body Answer: Black body 6. In radiative heat transfer, a gray surface is one a) which appears gray to the eye b) whose emissivity is independent of wavelength c) which

### Distillation-Differential Distillation (Rayleigh Equation) multiple choice questions

Distillation-Differential Distillation (Rayleigh Equation) 1. For a ternary mixture, the number of cuts required is_________ a) 1 b) 2 c) 3 d) 4 Answer: 2 2. Estimate the feed rate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also, the rate of residue is 60 mol/hr. a) 213 mol/hr b) 313 mol/hr c) 413 mol/hr d) 513 mol/hr Answer: 313 mol/hr 3. The initial portion of the distillate will be a low volatile component. a) True b) False Answer: False 4. Find the rate of distillate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also the rate of residue is 60 mol/hr. a) 153 mol/hr b) 253 mol/hr c) 353 mol/hr d) 453 mol/hr Answer: 253 mol/hr 5. After the separation by differential distillation, the high volatile and low volatile components are stored in _____________ a) Batch b) Cuts c) Distill d)

### Wind Energy multiple choice questions

Wind Energy 1. _____ force is responsible for forcing the global winds towards westernly direction. a) Coriolis b) Gravitational c) Centripetal d) Centrifugal Answer: Coriolis 2. Uneven heating occurs on land surface and water bodies are due to _____ a) Air Currents b) Solar radiation c) Lunar eclipse d) None of the above Answer: Solar radiation  3. The wind intensity can be described by a)  Reynolds number b) Mach number c) Beaufort number d) Froude number Answer: Beaufort number 4. Winds having following speed are suitable to operate wind turbines. a) 5 – 25m/s b) 10 – 35m/s c) 20 – 45m/s d) 30 – 55m/s Answer: 5 – 25m/s 5. The following is (are) the classification of winds a) Global wind b) Local wind c) both (a) and (b) d) None of the above Answer: both (a) and (b) 6. The amount of energy available in the wind at any instant is proportional to ___ of the wind speed. a) Square root power of two b) Square root power of three c) Square power d) Cube power Answer: Cube power  6. Globa

### Centrifugal Pumps multiple choice questions

Centrifugal Pumps  1. The rotational kinetic energy comes from ______ a) Engine motor b) Pump c) Tank d) Draft tube Answer: Engine motor 2. The inlet passage of water entry is controlled by ________ a) Head race b) Gate c) Tail race d) Pump Answer: Gate 3. The main function of centrifugal pumps are to ________ a) Transfer speed b) Transfer pressure c) Transfer temperature d) Transfer energy Answer: Transfer energy 4. The main function of nozzle is to __________ a) Varying temperatures b) Pressure variations c) Load variations d) Heat variations Answer: Pressure variations 5. Centrifugal pumps transfer energy from _______ a) Rotor to fluid b) Fluid to rotor c) Draft to rotor d) Rotor to draft Answer: Rotor to fluid 6. The fluid coming into the centrifugal pump is accelerated by ________ a) Throttle b) Impeller c) Nozzle d) Governor Answer: Impeller 7. Turbines and compressors work with the gas, while centrifugal pump transfers energy. a) True b) False Answer: True 8. Turbomachines wor

### Renewable Resources and Non Renewable Resources multiple choice questions

Renewable Resources and Non Renewable Resources Renewable Resources 1. The main composition of biogas is _______________ a) Methane b) Carbon dioxide c) Nitrogen d) Hydrogen Answer: Methane 2. In hydroelectric power, what is necessary for the production of power throughout the year? a) Dams filled with water b) High amount of air c) High intense sunlight d) Nuclear power Answer: Dams filled with water 3. Wood is a renewable resource. a) True b) False Answer: True 4. Nuclear Energy is a Renewable Energy. a) True b) False Answer: False 5. Which Indian enterprise has the Motto “ENERGY FOREVER”? a) Indian Renewable Energy Development Agency b) Indian Non-Renewable Energy Development c) Indian Agricultural Development d) Indian Biotechnology Development Answer: Indian Renewable Energy Development Agency 6. Which among the following have a large amount of installed grid interactive renewable power capacity in India? a) Wind power b) Solar power c) Biomass power d) Small Hydro power Answer:

### Bioelectric Signal and Electrodes multiple choice questions

Bioelectric Signal and Electrodes Bioelectric Signals 1. After a cell is stimulated, a finite period of time is required for the cell to return to its pre-stimulus state. This period is known as ____________ a) restoration period b) refactory period c) regain period d) regenerative period Answer: refactory period 2. EKG stands for _________________ a) Electrocardiography b) Electroencephalography c) Electromyography d) Electrtokinetcography Answer: Electrocardiography 3. Source of Bioelectric potential is ____________ in nature. a) electronic b) electric c) ionic d) mechanical Answer: ionic 4. The principal ion that is not involved with the phenomena of producing cell potentials is ______________ a) sodium b) potassium c) chlorine d) hydrogen Answer: hydrogen 5. Phonocardiography is listening to __________ a) arm muscle sound b) lungs sound c) heart sound d) respiratory tract sound Answer: heart sound 6. What is the relatively static membrane potential of quiescent cells called? a) h

### Unit Operations multiple choice questions

Unit Operations 1. What is the removal of fine particle sand dissolved solids called? a) Filtration b) Sedimentation c) Deoxidation d) Disinfection Answer: Filtration 2. Solids concentration will be ________ in water than wastewater. a) More b) Less c) Equal to d) Similar Answer: Less 3. _________ is simply detaining water for a sufficient time. a) Coagulation b) Flocculation c) Sedimentation d) Filtration Answer: Sedimentation 4. Unit operations are the ______ operations to remove the impurities. a) Physical b) Chemical c) Biological d) Biochemical Answer: Physical 5 . Refrigeration is a mass transfer process. a) True b) False Answer: False 6. What did the structures use to prevent floating matter that enters into pumps and pumping systems? a) Aeration units b) Screens c) Grit chamber d) Bioreactor Answer: Screens 7. Separation is a unit operation. a) True b) False Answer: True 8. How are colour and odour removed? a) Adsorption b) Sedimentation c) Filtration d) Coagulation Answer: A

### Top 200 Digital Signal Processing Objective Questions and Answers

Top 200 Digital Signal Processing Objective Questions and Answers 1. DTFT is the representation of a) Periodic Discrete time signals b) Aperiodic Discrete time signals c) Aperiodic continuous signals d) Periodic continuous signals Answer: Aperiodic Discrete time signals 2. The interface between an analog signal and a digital processor is a) D/A converter b) A/D converter c) Modulator d) Demodulator Answer: A/D converter 3. The speech signal is obtained after a) Analog to digital conversion b) Digital to analog conversion c) Modulation d) Quantization Answer: Digital to analog conversion 4. x(n)=x(n-1)/4 with initial condition x(0)-1, gives the sequence a) x(n)= (1/4)^n b) x(n)= -(1/4)^n c) x(n)= (1/4)^-n d) x(n)= (-1/4)^-n Answer: x(n)= -(1/4)^n 5. For a system function H(s) to be stable a) The zeros lie in left half of the s plane b) The zeros lie in right half of the s plane c) The poles lie in left half of the s plane d) The poles lie in right half of the s plane Answer: The poles