Exercise, School

Archive

-

Mississippi Valley Textile Museum

Name/Title

Exercise, School

Entry/Object ID

1991.05.03.03

Scope and Content

Peach coloured, legal sized paper. The Victoria University of Manchester College of Technology Easter Terminal Examination, 1939. Session 1938-39 Electro-Technics 7 questions Revers; Blank page Transcription: IO.CBO. P B.S. 7/85. THE VICTORIA UNIVERSITY OF MANCHESTER (FACULTY OF TECHNOLOGY) COLLEGE OF TECHNOLOGY Easter Terminal Examinations, 1939, Session 1930-39 EIECTRO-TECHNICS (2 A.C., T.C., T.I.) Thursday, 23rd March, 1939. 1.30 to 4*30 p.m. Candidates are required to attempt not more than FIVE questions. QUESTIONS: 1. Describe the construction of one form of Moving-Iron Ammeter. How can the range of current values measured by such an instrument be increased? 2. Distinguish between a lap-wound and a wave-wound armature. Draw a diagram of a lap winding for a dynamo having 4 poles and an armature with 12 slots and 2 conductors per slot. Indicate the position and polarity of the field magnets and brushes, and the direction of rotation of the armature. Is the winding shown progressive or retrogressive? 3. Draw a diagram of the Wheatstone Bridge circuit and derive the expression for the relationship between the values of th© fcur arms of the bridge in the balanced condition. Describe the practical form of this bridge known as the ''Post Office Box". 4. A magnetic circuit consists of a ring of soft iron 15 inches in diameter, with an air-gap of l/25th inch, of circular cross section 14 inches in diameter. Calculate the number of ampere turns necessary to produce a flux density of 13,500 gauss, If the permeability of iron at this flux density is 900. 5. Give the circuit diagram, and explain the operation ox' a starter for a D.C.Shunt Motor. Explain the purpose and operation of the protective devices usually associated with this type of starter. 6. Sketch and explain the speed-torque curves, and give a diagram of connections of a D.C,Series Motor. What is the danger associated with this type of motor? 7. A sinusoidal current of requenoy 50 cycles per second and maximum value 14.14 amperes, fluws through a resistance of 50 chins in series with an inductance of 0.6 Henry. Calculate the R.M.S. value of the voltage across the whole circuit and the power in the circuit.

Collection

Textile Industry

Cataloged By

Murray, Pam

Lexicon

Nomenclature 4.0

Nomenclature Primary Object Term

Exercise, School

Nomenclature Sub-Class

Instructional Documents

Nomenclature Class

Documentary Objects

Nomenclature Category

Category 08: Communication Objects

LOC Thesaurus for Graphic Materials

Education, Examinations, Textile industry, Tests

Search Terms

Manchester University

Location

Location

Drawer

D65

Room

Collections Room

Building

M.V.T.M.

Category

Permanent

Date

November 7, 2023

Location

Container

Archive Box 1

Shelf

Shelf 2, Shelf 2

Wall

Wheel Rack

Room

Collections Room

Building

M.V.T.M.

Category

Permanent

Moved By

Whit, Elizabeth

Date

July 7, 2016

Relationships

Related Person or Organization

Person or Organization

Bornet, George M.

General Notes

Note

Status: OK Status By: Cotter, Ellen Status Date: 2022-06-07

Created By

admin@catalogit.app

Create Date

June 25, 2010

Updated By

admin@catalogit.app

Update Date

November 11, 2023