Answered: particular load runs at 24rev/s when…

particular load runs at 24rev/s when drawing 15A from the supply. Calculate the speed of the motor when the load is changed such that the current is increased to 30A.

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter13: Energy And Power

Section: Chapter Questions

Problem 3P: An elevator has a rated capacity of 2200 lb. It can transport people at the rated capacity between...

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Concept explainers

Quantity takeoff

Quantity takeoffs (QTO) are precise estimates of the materials and labor costs required to finish a construction project. During the pre-construction phase, an estimator prepares them, breaking down the project into smaller, more manageable parts that are easier to evaluate. These measurements are used to prepare a construction scope bid. Estimators examine the drawings, specifications, and models to figure out different quantities and their costs. Since, the components, their quantity, and price are all included in the model, quantity take-off can be done automatically using Building Information Modelling (BIM). The time taken for completing a construction project can be reduced by the use of quantity takeoff. These takeoffs are also called material takeoffs and construction takeoffs.

Question

A series motor has an armature resistance of 0.202 and a series field resistance of 0.302. It is connected to a 240V supply and at a
particular load runs at 24rev/s when drawing 15A from the supply. Calculate the speed of the motor when the load is changed such
that the current is increased to 30A.
ANSWER:
_rev/sec
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