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q if the degree of curve is defined by the angle at the center subtended by an arc or chord 20 meters find the length of the chord in meters so
q a transition curve is required for a circular curve of 200-meter phi radius the gauge being 15 m and max super elevation restricted to 15 cm
q what do you mean by river gaugingdue to certain behavior of rivers the problem of gauging then is quit complex the purpose of river gauging is to
q what are the different types of patrolling when these are adopted what are points to be considered while preparing the charts ans- types of
q explain hot weather patrolling hot weather patrolling is done for lwr and cwr tracks when the rail temperature reaches td 200 c and above and td
q how can a temporary diversion to laid a cross flowing river in case of disruption to rail traffic over a major bridge lasting over 6 months ans-
the armature of a four-pole dcmachine has a simplex lap wound commutator winding which has the number of parallel paths equal to the number of poles
a two-pole three-phase 60-hz wye-connected round-rotor synchronous generator has na 12 turns per phase in each armature phase winding and flux per
a steel plate with dimension shown in sketch a below is subjected to p 150 kn tensile force and m 300 n-m bending moment the plate is made of aisi
compute the efficiency of the transformer of example corresponding to a full load 08 power factor lagging and b one-half load 06 power factor lagging
the transformer of example is supplying full load ie rated load of 50 kva at a rated secondary voltage of 240 v and 08 power factor lagging
a single-phase 50-kva 2400240-v 60-hz distribution transformer has the following parametersresistance of the 2400-v winding r1 075resistance of the
q show transformer equivalent circuitstransformers come in various sizes from very small weighing only a few ounces to very large weighing hundreds
q basic definition of electromagnetisma basic understanding of electromagnetism is essential to the study of electrical engineering because it is the
q what do you mean by load factorthe two components of electric service are demand and energy demand is the maximum level of real power which the
q define transmission-system efficiencythe transmission-system efciency is dened as the ratio of the real power delivered to the receiving-end bus to
q find the line current after the addition of capacitor banka 60-hz three-phase motor draws 25 kva at 0707 lagging power factor from a 220-v source
ac power has significant practical advantages over dc power in generation transmission and distribution one major drawback of the single-phase
q planning and research in power systemenergy research worldwide is assuming top priority in particular because of economic en - vironmental and
q use of computers in power systemsthe control and stability of any electric power system is indeed extremely important in particular when a system
q present and future trends in power systemsaccording to the edison electric institute electricitys share of us primary energy was almost 36 in 1989
q introduction to power systemsthomas a edisons work in 1878 on the electric light led to the concept of a centrally located power station with
q show principal source of energythe principal source of energy comes from the burning of fossil fuels such as coal and oil to generate steam which
q illustrate ac power systemselectric power is indispensable for any modern society our use and demand for electric power grows annually at the rate
q dtl and ttl logic circuitsbipolar transistorswere the first solid-state switching devices commonly used to implement digital logic circuits in the