MGVCL Exam Paper (30-07-2021 Shift 1) In computer networks, the nodes are the computer that terminates data the computer that routes data all the mentioned above the computer that originates data the computer that terminates data the computer that routes data all the mentioned above the computer that originates data ANSWER DOWNLOAD EXAMIANS APP
MGVCL Exam Paper (30-07-2021 Shift 1) A coil having an inductance of 100 mH is magnetically coupled to another coil having an inductance of 900 mH. The coefficient of coupling between the coils is 0.45. Calculate the equivalent inductance if the two coils are connected in series aiding. 1135 mH 730 mH 1270 mH 932 mH 1135 mH 730 mH 1270 mH 932 mH ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Mutual inductance (M) = k*√(L1*L2)k = 0.45M = 0.45*√(900*100*10⁻⁶) = 135 mHLeq = L1 + L2 + 2MLeq = 900 + 100 + 270Leq = 1270 mH
MGVCL Exam Paper (30-07-2021 Shift 1) Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load. 325/√3 VAR 425/√3 VAR 425√3 VAR 325√3 VAR 325/√3 VAR 425/√3 VAR 425√3 VAR 325√3 VAR ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Reactive power taken, Q = √3*(W1 - W2)Q = √3*(375 + 50)Q = √3*425 kVAR
MGVCL Exam Paper (30-07-2021 Shift 1) The frequency of the emf in the stator of a 4-pole induction motor is 50 Hz, and that in the rotor is 2 Hz. What is the slip and at what speed is the motor running? 4%, 1440 rpm 3%, 1455 rpm 4%, 1455 rpm 3%, 1440 rpm 4%, 1440 rpm 3%, 1455 rpm 4%, 1455 rpm 3%, 1440 rpm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Rotor frequency, f_r = s*f_ss = 2/50s = 0.04Ns = 120f/PNs = 1500 rpms = (Ns - Nr)/NsNr = Ns(1 - s)Nr = 1500*(1 - 0.04)Nr = 1440 rpm
MGVCL Exam Paper (30-07-2021 Shift 1) નીચેના રુઢિપ્રયોગોને અર્થ સાથે સાંકળી જોડી બનાવો.1. કાન કરડવા - 1. બાતમી મળી જવી.2. કાન ફૂંકવા - 2. વાત પર ધ્યાન ન આપવું.૩. કાને વાત પહોચવી - ૩. કાન 1-22-33-44-1 1-42-33-14-2 1-32-43-14-2 1-32-23-44-1 1-22-33-44-1 1-42-33-14-2 1-32-43-14-2 1-32-23-44-1 ANSWER DOWNLOAD EXAMIANS APP
MGVCL Exam Paper (30-07-2021 Shift 1) At what range of wind speed is the electricity from the wind turbine is generated? 30-35 mph 450 – 650 mph 100 – 125 mph 250 – 450 mph 30-35 mph 450 – 650 mph 100 – 125 mph 250 – 450 mph ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For small turbine starts generating power 12.6 kph (3.5 m/s) is the typical cut-in speed.At 36–54 kph (10–15 m/s) produces maximum generation power.At 90 kph (25 m/s) maximum, the turbine is stopped or braked.
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