Description : Which one is used to determine the colour of petroleum products? (A) Colour comparator (B) Saybolt chromometer (C) Cleveland apparatus (D) None of these
Last Answer : (A) Colour comparator
Description : Which electrode acts as reference electrode and gives its potential value ?
Last Answer : Standard hydrogen electrode was taken as reference electrode whose potential is assumed zero. Nelsons equation for any cell reaction is given by. E = Eo + (2.303RT /nF) log [Oxidation form]/[reduced form]
Description : The adhering of tissues on the surgical electrode usually means: A. Current intensity is too high B. Current intensity is too low C. Dispersion plate not applied to patient D. None of the above
Last Answer : B. Current intensity is too low
Description : In electro surgery, the tissue may stick to the electrode because of , A. The current intensity is too high B. The current intensity is too low
Last Answer : B. The current intensity is too low
Description : What is Glass Electrode pH Meter ?
Last Answer : A cell is formed by combining a glass electrode and a proof calomel electrode (indicating electrode) to which a fine voltmeter is connected and the pH meter is shown as the pH meter is shown instead of the volt unit in the recorder.
Description : Why the blue colour of CuSO4 turns colourless during electrolysis of CuSO4 solution by platinum electrode.
Last Answer : The platinum electrodes are inert. Hence does not dissolve into the solution. The Cu++ ions (blue) present in the solution are discharged on the surface of cathode & OH - are ... a result of this electrolysis, blue coloured CuSO4 solution is slowly converted into colorless H2SO4 solution.
Description : What would be the reduction potential of an electrode at 298 K , which originally contained ` 1K_(2)Cr_(2)O_(7)` solution in acidic buffer solution of
Last Answer : What would be the reduction potential of an electrode at 298 K , which originally contained ` 1K_(2)Cr_(2)O_(7)` ... V` C. `1.187 V` D. None of these
Description : belt of silk runs over two metal pulleys, one of which is surrounded by a hollow metal sphere. Two electrodes, in the form of comb-shaped rows of sharp metal points, are positioned ... potential is applied to the upper pulley. A simple version of which equipment is being described here?
Last Answer : Van de Graaff generator.
Description : The potential of standard hydrogen electrode (SHE) is conventionally fixed as a) 0.1 volt b) 0.0 volt c) 0.242 volt d) 0.34 volt
Last Answer : b) 0.0 volt
Description : What is the pH value and colour of paper of ammonia solution?
Last Answer : Need answer
Description : Turbidity of water is expressed (A) In ppm (B) In numbers in an arbitrary scale (C) By pH value (D) By colour code
Last Answer : (A) In ppm
Description : Rate of heat release in a furnace, which is the measure of heat intensity, is defined as (A) kcal/hr/m3 combustion space (B) kcal/m3 combustion space (C) kcal/hr (D) None of these
Last Answer : (A) kcal/hr/m3 combustion space
Description : What happens to a comparator when both inputs are equal?
Last Answer : What you're talking about here is an op-amp configured in open loop mode - no feedback resistor, so the output swings + or -, generally in opposition to the higher value on the inputs. ... are completely equal, because of thermal variations, quantum effect, and other non-ideal aspects of a circuit.
Description : What is a comparator ?
Last Answer : A comparator is a type of circuit that compares signal or voltage levels.
Description : In a series wound motor, the current passing through the field windings is also passing through the _____________. A. armature B. shunt field C. reactance comparator D. laminations
Last Answer : Answer: A
Description : Essentially a satellite ___________ is a radio repeater in the sky A. transponder B. comparator C. duplexer D. billboard
Last Answer : A. transponder
Description : What do you mean by comparator
Last Answer : A comparator is a special combinational circuit designed primarily to compare the relative magnitude of two binary numbers.
Description : What are the characteristics of a comparator?
Last Answer : 1.Speed of operation 2.Accuracy 3.Compatibility of the output
Description : What are the applications of comparator?
Last Answer : 1.Zero crossing detector 2.Window detector 3.Time marker generator 4.Phase detector
Description : What is a comparator?
Last Answer : A comparator is a circuit which compares a signal voltage applied at one input of an opamp with a known reference voltage at the other input. It is an open loop op - amp with output + Vsat .
Description : Differentiate Schmitt trigger and comparator.
Last Answer : comparator. 1. It compares the input signal with references voltage then yields the output voltage 2. It need not consist of feedback 3. comparator output need not to besquare wave Schmitt ... reference points namely UTP<P. 2. It employs positive feedback 3. Its output is square wave.
Description : Which of the following circuit is used as a 'Memory device' in computers? 1) Rectifier 2) Flip-Flop 3) Comparator 4) Attenuator
Last Answer : 2) Flip-Flop
Description : A controller essentially is a A. Sensor B. Clipper C. Comparator D. Amplifier
Last Answer : C. Comparator
Description : What are the functions of a converter-comparator group?
Last Answer : The comparator compares the signal strengths from the receivers and the converter converts the frequency-shift rf signal into a tty set dc loop control signal.
Description : What does a lighted LED indicate on a logic comparator?
Last Answer : A difference in logic states between the reference IC and the IC under test.
Description : Design and explain a comparator to compare two identical
Last Answer : words. • Two numbers represented by A = A3A2A1A0 & B = B3B2B1B0 • If two numbers equal P = Ai Bi • Obtain the logic Expression. • Obtain the logic diagram.
Description : What do you mean by comparator?
Description : The conversation speed of an analog to digital converter is maximum with the following technique. (A) Dual slope AD converter. (B) Serial comparator AD converter. (C) Successive approximation AD converter. (D) Parallel comparator AD converter.
Last Answer : (D) Parallel comparator AD converter.
Description : Which of the following circuit is used as 'Memory device' in computers ? (1) Rectifier (2) Flip-Flop (3) Comparator (4) Attenuator
Last Answer : Flip-Flop
Description : Describe block diagram of digital comparator and write truth table of 2 bit comparator.
Last Answer : Digital comparator is a combinational circuit which compares two numbers, A and B; and evaluates their relative magnitudes. The outcome of the comparison is given by three binary variables which indicate whether A ... Depending on the result of comparison one of these outputs will go high.
Description : State any two application of each of following i) Comparator ii) Zero Crossing Comparator
Last Answer : Application of Comparator: 1. Null detectors: A null detector is one that functions to identify when a given value is zero. Comparators can be a type of amplifier distinctively for null comparison ... detector controls the switching so that it occurs at close to zero voltage of the cycle.
Description : In a control system, the comparator measures the difference between (a) output and input (b) output of controller and system (c) actual and desired performance (d) input and error signal
Last Answer : B
Description : In successive approximation converter input to the comparator is through (A) DAC (B) Latch (C) Flip-flop (D) Sample and hold circuit
Last Answer : In successive approximation converter input to the comparator is through DAC
Description : The number of comparators required in a 3-bit comparator type analog to digital converter is A) 2 B) 3 C) 7 D) 8
Last Answer : Number of comparators =2^n -1= 2^3 -1=7
Description : The output Y of a 2-bit comparator is logic 1 whenever the 2-bit input A is greater than the 2-bit input B. The number of combinations for which the output is logic 1, is (A) 4 (B) 6 (C) 8 (D) 10
Last Answer : The output Y of a 2-bit comparator is logic 1 whenever the 2-bit input A is greater than the 2-bit input B. The number of combinations for which the output is logic 1, is 6
Description : Which circuit is used as amplitude comparator?
Last Answer : Schmitt trigger circuit is used as amplitude comparator.
Description : The number of comparators required in a 4 bit comparator type ADC is (A) 16 (B) 15 (C) 17 (D) 12
Last Answer : The number of comparators required in a 4 bit comparator type ADC is 15
Description : A digital voltmeter uses an A/D converter which needs a start pulse, uses an analog comparator and has a relatively fixed conversion time independent of the applied voltage. The A/D ... Successive Approximation Converter .b) Digital Ramp Converter c) Digital Slope Converter d) All the above
Last Answer : A digital voltmeter uses an A/D converter which needs a start pulse, uses an analog comparator and has a relatively fixed conversion time independent of the applied voltage. The A/D converter is : - Successive Approximation Converter
Description : One input terminal of high gain comparator circuit is grounded and a sinusoidal voltage is applied to the other input. The output of comparator will be___________.
Last Answer : One input terminal of high gain comparator circuit is grounded and a sinusoidal voltage is applied to the other input. The output of comparator will be a square wave.
Description : The refractive index of the material of a glass prism depends upon (a) The angle of the prism (b) The intensity of the incident light ray (c) The colour of the incident light ray (d) Size of the prism
Last Answer : Ans:(c)
Description : Pick up the correct statement from the following: (A) For determination of small colour intensities, tintometer is generally used (B) The odour of water sample is generally measured by a term called odour intensity (C) The colour of water sample may be detected by Nessler tube (D) All the above
Last Answer : (D) All the above
Description : The emission of number of photo electrons depends upon a) The colour of the body b) The frequency of incident light c) The intensity of light d) All of the above
Last Answer : c) The intensity of light
Description : Petroleum coke is used mainly in the (A) Discoloration of yellow glycerine (B) Sugar refining (C) Manufacture of carbon electrode (D) Blast furnace for reduction of iron ore
Last Answer : (C) Manufacture of carbon electrode
Description : Maximum use of petroleum coke is in (A) Adsorption refining operation (B) Fuel gas manufacture (C) Carbon electrode manufacture (D) Iron ore reduction
Last Answer : (C) Carbon electrode manufacture
Description : Deacon's method is used for the manufacture of (A) Glauber's salt (B) Common salt (C) Chlorine (D) Graphite electrode
Last Answer : (C) Chlorine
Description : Pick out the wrong statement. (A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding (B) Electrode tip in spot welding is of copper and the ... joined are overlapped and placed between two electrodes (D) Mild steel sheet cannot be spot welded
Last Answer : (D) Mild steel sheet cannot be spot welded
Description : Which of the following mainly decides the current to be employed is arc welding? (A) Electrode size (B) Plate thickness (C) Voltage across the arc (D) Welded portion length
Last Answer : (A) Electrode size
Description : Coating provided on the electrodes used in the arc welding is not expected to (A) Add alloying elements (B) Prevent electrode from contamination (C) Stabilise the arc (D) Provide protective atmosphere to weld
Last Answer : (B) Prevent electrode from contamination
Description : Material of construction of the electrode used in the electric resistance welding is (A) Stainless steel (B) Graphite (C) Copper (D) Steel
Last Answer : Option C
Description : What is the colour of carbon dioxide solution on a pH scale?