Q1. A thorough knowledge of the mechanism is necessary for the estimate of convective heat transfer coefficient so that the process can be adequately represented by mathematical equation. The critical radius of a hollow sphere having thermal conductivity k and ho as convecting heat transfer coefficient of outer fluid is given by. Boltzmann Machines. a. convection heat transfer coefficient of natural convection is lower than the convection heat transfer coefficient of forced convection, b. convection heat transfer coefficient of natural convection is more than the convection heat transfer coefficient of forced convection, c. convection heat transfer coefficients in both natural and forced convection are the same for same system, Q94. What is the correct formula for the intensity of the emitted radiation of a black body (I) in terms of its emissive power (Eb)? The total radiation leaving a surface per unit time per unit surface area is called as, Q86. a. the intensity of emitted radiation is constant and depends upon the direction, b. the intensity of emitted radiation is not constant and depends upon the direction, c. the intensity of emitted radiation is constant and does not depend upon the direction. 103. What is the correct formula for the Nusselt modulus or Nusselt number (Nu)? Q65. [total number of physical quantities (n)] – [the number of primary dimensions (m) needed to express the dimensional formulae of n physical quantities], b. Learning to rank or machine-learned ranking (MLR) is the application of machine learning, typically supervised, semi-supervised or reinforcement learning, in the construction of ranking models for information retrieval systems. Convective heat transfer coefficient is also known as. Q109. So rate of heat flow by convection doesn’t depend on. Boltzmann machines have a simple learning algorithm that allows them to discover interesting features in datasets composed of binary vectors. a. the reflection of radiation on a rough surface which occurs in all directions, b. the reflection of radiation on a rough surface which occurs in a single direction, c. the reflection of radiation on a smooth surface, a. the body which does not reflect radiation, b. the body which does not absorb radiation, c. the body which does not transmit radiation. When does the general heat conduction equation which gives the temperature distribution and conduction heat flow in an isotropic solid reduce to Laplace equation? What that means is that it is an artificial neural network that works by introducing random variations into the network to try and minimize the energy. Transfer type heat exchanger or recuperator, b. a. In general which among the following equations is correct for change in energy of element during a time span dt? a. the intensity of radiation increases with increase in the thickness of gas layer, b. the intensity of radiation decreases with increase in the thickness of gas layer, c. the intensity of radiation remains unaffected with change in the thickness of gas layer, Q64. Mixing of fluid from regions of high temperature with the fluid from region of low temperature. Restricted Boltzmann Machines, or RBMs, are two-layer generative neural networks that learn a probability distribution over the inputs. Q73. Q110. When the layers of a composite wall are in series and the thermal resistance of every individual layer is given then the total thermal resistance of the composite wall is given by, a. substantiating lower value thermal resistance from higher value thermal resistance, c. multiplying both the thermal resistances, Q138. a. After getting the prediction from each model we will use model averaging techniques like weighted average, variance or max voting to get the final prediction. Q112. What is the relation between convection heat transfer coefficients of natural convection and forced convection? The Nusselt modulus or Nusselt number is a convenient measure of. In machine learning, a deep belief network (DBN) is a generative graphical model, or alternatively a class of deep neural network, composed of multiple layers of latent variables ("hidden units"), with connections between the layers but not between units within each layer. What is the temperature gradient in the conduction heat transfer? The compact heat exchangers are commonly used in. The rate of heat transfer by conduction into a section at x is equal to, a. sum of rate of heat transfer by convection out of the element (x+dx) and heat transfer by convection from the surface between x to (x+dx), b. sum of rate of heat transfer by conduction out of the element (x+dx) and heat transfer by conduction from the surface between x to (x+dx), c. sum of rate of heat transfer by conduction out of the element (x+dx) and heat transfer by convection from the surface between x to (x+dx), Q66. How is the rate of heat transfer from the fin given? A Restricted Boltzmann machine is an algorithm useful for dimensionality reduction, classification, regression, collaborative filtering, feature learning and topic modeling. a. if the body or element is in unsteady-state with heat generation, b. if the body or element is in steady-state with heat generation, c. if the body or element is in unsteady-state with no heat generation, d. if the body or element is in steady-state with no heat generation, Q30. The rate of radiant flux between two black bodies is analogous to. Class 12; Class 11; Class 10; Class 9; Class 8; Class 7; Class 6; Class 5; Class 4; Class 3; Class 2; … In pool boiling process, the region after the natural convection in which the vapour bubbles form with increase in heat flux, is called as, Q171. Google’s Search Engine One of the most popular AI Applications is the google search engine. Since they were proposed more than twenty years ago, it has been demonstrated that they are capable of solving various problems such as optimisation problems 1, repairing degraded images 2, and learning interdependency among random variables 3.For optimisation problems, … 90% of the incident radiation on glass in the visible range is. Which object can be used as a radiation shield? ... MCQ ON DYNAMIC OF MACHINE MCQ ON DYNAMIC OF MACHINE. Consider system A at uniform temperature t and system B at another uniform temperature T (t > T). Q92. If backlash occurs the analysis will be non-linear because the backlash can cause undesired oscillation in the feedback control system. Which phenomenon is related to the term radiation? (a) Stefan’s Boltzmann Law (b) Kirchhoff’s Law (c) Wien’s Displacement Law (d) None. a. the analysis of a system in which it is assumed to be at no uniform temperature, b. the analysis of a system in which it is assumed to be at uniform temperature, c. the analysis of a system in which it is assumed to be at either uniform or no uniform temperature. This equation is known as, Q31. Generally, natural convection occurs due to, c. change in molecular structure of a fluid, Q121. a. all the incident radiation is not absorbed completely by gray body, b. the emissivity of the gray body is less than unity, c. the absorptivity of the gray body is less than unity, Q115. What is kinematics viscosity of a fluid? The shear stress (τ) is directly proportional to (H x U0), b. a. An oil cooler in a high performance engine has an outside surface area 0.12 m2 and a surface temperature of 65 degree Celsius. What is lumped heat capacity analysis? heat dissipation, and models the decrease in the entropy of a closed model - while the model starts with relatively low entropy (i.e. Q119. The shear stress (τ) is directly proportional to (H / U0), c. The shear stress (τ) is directly proportional to (U0 / H). " Well they certainly successfully encrypted their messages. Its energy function is as an extension of the energy function of the RBM: $$ E\left(v, h\right) = -\sum^{i}_{i}v_{i}b_{i} - \sum^{N}_{n=1}\sum_{k}h_{n,k}b_{n,k}-\sum_{i, k}v_{i}w_{ik}h_{k} - \sum^{N … Which of the following is NOT a type of heat exchanger? If you open up your chrome browser and start typing something, Google immediately provides … www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. Which regime in boiling heat transfer process can represent a transition from nucleate boiling to film boiling? 1) Which of the following statements is/are true for alloy steels? h1 and h2 are the convection heat transfer coefficients on each side of wall. This process of introducing the variations and looking for the minima is known as stochastic gradient descent. How is the logarithmic mean temperature difference (LMTD) calculated for heat exchangers?Where, ΔTi= temperature difference between hot and cold fluid at inlet of heat exchanger, ΔTe = temperature difference between hot and cold fluid at exit of heat exchanger, Q47. The maximum temperature difference between heat generation temperature (T) and the temperature of outer surface (To) of a plane wall of thickness 2l is given by, Heat is generated at the rate of q̇ at the centre of wall being both the outer surfaces are at distance l from the heat generation pointk is thermal conductivity of the wall, Q70. Q3. Which parameter in the radiant heat exchange between two black bodies is analogous to the voltage in electrical system? a. to determine number of dependent dimensionless groups which are necessary to represent the phenomenon in a mathematical expression, b. to determine number of independent dimensionless groups which are necessary to represent the phenomenon in a mathematical expression, c. to determine number of dependent groups with their dimensions which are necessary to represent the phenomenon in a mathematical expression, d. to determine number of independent groups with their dimensions which are necessary to represent the phenomenon in a mathematical expression. “A surprising feature of this network is that it uses only locally available information. By continuing, I agree that I am at least 13 years old and have read and agree to the. Generally the external thermal resistance between the surface of the body and the environment is, a. less than the internal conduction resistance in the body, b. more than the internal conduction resistance in the body, c. same as the internal conduction resistance in the body. a. dynamic viscosity per unit volume of the fluid, b. dynamic viscosity per unit weight of the fluid, c. dynamic viscosity per unit density of the fluid. The heat is transferred from the hot water to atmospheric air. Deep Learning has made many practical applications of machine learning possible. Infrared range for fiber optics . of two systems are the different, then only their behavior will be similar. If the body or element is in steady-state but has heat generation then the general heat conduction equation which gives the temperature distribution and conduction heat flow in an isotropic solid reduces to(∂T/∂x2) + (∂T/∂y2) + (∂T/∂z2) + (q̇/k) = 0. The thermal conductivity is k. Q166. Q78. Q20. Boltzmann machines are non-deterministic (or stochastic) generative Deep Learning models with only two types of nodes — hidden and visible nodes. Q218. 2] Unsupervised ML. Generally, the convection heat transfer coefficient in drop-wise condensation is, a. lower than the convection heat transfer coefficient in film condensation, b. higher than the convection heat transfer coefficient in film condensation, c. equal to the convection heat transfer coefficient in film condensation, Q206. Which among the following factors is/are taken into account in calculation of radiation emitted or absorbed by a gas layer? Large sized and heavy shell-and-tube heat exchangers are suitable for. In Restricted Boltzmann Machine (RBM), units in the same layer are not connected. Q237. Consider a plane wall of finite thickness having energy generation in it. What is the correct formula for the rate of heat transfer by convection form a surface of area A at temperature T to the surrounding fluid at temperature T0?Where h is convection heat transfer coefficient, Q199. In a process called simulated annealing, the Boltzmann machine runs processes to slowly separate a large amount of noise from a signal. What will happen to the thermal resistance for convection of wall if the thickness of the insulation is increased? How is the total thermal resistance (R) of the wall calculated? Suppose a hot water is placed inside a closed metal vessel of thickness 5 mm. What is the intensity of radiation (I)? According to Stefan-Boltzmann law of thermal radiation. Jan 17,2021 - Test: Stefan Boltzmann Law | 10 Questions MCQ Test has questions of Chemical Engineering preparation. What is the dimensional formula for work? Q129. Image Recognition – Recognizes and identifies peoples and objects in images as well as to understand content and context. Which of the following assumptions is/are correct to obtain an analytical solution for the problem on laminar boundary layer of fluid on flat plate? There are no output nodes! Q88. Download Citation | Centered convolutional deep Boltzmann machine for 2D shape modeling | An object shape information plays a vital role in many … Today, it is being used for developing applications which were considered difficult or impossible to do till some time back. Q122. How is the cooling at night in coastal areas? Q74 The heat exchanger is said to be compact when its area density is. It is similar to a Deep Belief Network, but instead allows bidirectional connections in the bottom layers. Support-vector machine weights have also been used to interpret SVM models in the past. Which surface does the drop-wise condensation occur on? Plate temperature is higher than the fluid temperature, c. Plate temperature is equal to the fluid temperature. MCQ ON DYNAMIC OF MACHINE MODULE 01 1. Other Boltzmann machines 9.Backpropagation through random operations 10.Directed generative nets 11.Drawing samples from autoencoders 12.Generative stochastic networks 13.Other generative schemes 14.Evaluating generative models 15.Conclusion 2. How does the gray body differ from the black body? When the formation of bubbles becomes very high in pool boiling, then the heat flux, Q170. Which side is suitable to provide fins on to enhance heat transfer, when heat exchanges between gas and liquid? Q23. Q212. Q60. [Thermal resistance of heat exchanger without scaling] – [Thermal resistance of heat exchanger with scaling], b. Q190. This test is Rated positive by 90% students preparing for IT & Software.This MCQ test is related to IT & Software syllabus, prepared by IT & Software teachers. The buoyancy forces which give rise to the natural convection are called as, Q96. Qr = σ A (T b4 – Tw4), Q c = k A d t/δ = 1979.5 W. So temperature of black body is 955.9 K. What is the wavelength band for solar radiation? Q210. Q107. What is hydro-dynamically developed region in fluid flowing inside a pipe? The thermal conductivity of the wall is k and the heat is transferred normal to the surface area A. Q168. Q79. You will understand the working of RBM Autoencoders, illustrate Collaborative Filtering using RBM and … Q159. The intensity of mixing of fluid in natural convection is, a. more than the intensity of mixing of fluid in forced convection, b. less than the intensity of mixing of fluid in forced convection, c. equal to the intensity of mixing of fluid in forced convection, Q95. How is the greenhouse effect experienced on earth? What is the formula for the thermal resistance (R) of a hollow cylinder of internal radius Ri, outer radius Ro and the length l ? Q224. What is critical heat flux in boiling heat transfer process? As the radius increases in hollow cylinder the temperature, c. it depends upon the direction of heat flow. a. the thermal resistance of conduction increases with increase in outer radius of the hollow cylinder, b. the thermal resistance of conduction decreases with increase in outer radius of the hollow cylinder, c. the thermal resistance of conduction remains same with change in outer radius of the hollow cylinder. a. heat transfer in sphere is restricted in all direction by insulation, b. sphere has the smallest volume per unit surface area, c. sphere has the largest volume per unit surface area. What is the reason behind the fact that the thermal resistance of hollow cylinder for convection decreases with increase in the thickness of the insulation? What is the purpose of using baffles in shell-and-tube heat exchangers? ... a machine that continuously creates its own energy (e) production of energy by temperature differential in sea water at different levels. 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