Basic Electrical Engineering MCQ_45_1 (Engineering Materials)

 

Q.1 Porous materials____most of the sound.
    A. reflect
    B. absorb
    C. create
    D. transmit
Ans.: B
 
Q. 2 Dies for wire drawing are made of ___.
    A. high carbon steel
    B. cast iron
    C. carbides
    D. steel
Ans.: C
 
Q. 3 Which of the following is the amorphous material?
    A. lead
    B. Zinc
    C. glass
    D. silver
Ans.: C
 
Q. 4 _____The ability of the material to absorb a large amount of energy.
    A. Resilience
    B. ductility
    C. malleability
    D. toughness
Ans.: A
 
Q.5 Stainless steel is an alloy of ____.
    A. iron, chromium and vanadium
    B. iron, chromium and molybdenum
    C. iron, chromium and nickel
    D. any of the above
Ans.: C
 
Q. 6 For elastic materials stress and strain are related ___.
    A. Hooke’s law
    B. Dalton’s law
    C. Gauss’s law
    D. Poisson’s law
Ans.: A
 
Q. 7 When an insulating material starts conducting?
    A. voltage applied exceeds the breakdown voltage
    B. Temperature is raised to a very high level
    C. Both A and B
    D. none of the above
Ans.: C
 
Q. 8 Varnish is used in electrical machine mainly for ___.
    A. adhesion
    B. coating
    C. impregnation
    D. All of the above
Ans.: D
 
Q. 9 ___ is the change in dimensions during the process of magnetization.
    A. Magnetostriction
    B. Peltier effect
    C. skin effect
    D. Ferranti effect
Ans.: A
 
Q.10 Which of the following width of energy band is depends.
    A. pressure
    B. Temperature
    C. Mass of atom in the material
    D. relative free electrons in the crystal
Ans.: D
 
Q. 11 The principle of Hall effect used in the construction of which one of the following?
    A. Galvanometer
    B. Ammeter
    C. Volt meter
    D. Gaussmeter
Ans.: D
 
Q. 12 which of the following properties to be considered while selection of electric engineering materials?
    A. Chemical, physical
    B. mechanical, electrical
    C. Thermal
    D. All of the above
Ans.: D
 
Q. 13 While selection of engineering materials, which of the following important consideration to be made?
    A. cost
    B. availability
    C. ease of fabrication
    D. All of the above
Ans.: D
 
Q. 14 Because of ______ the resistivity of metal is a function of temperature.
    A. the amplitude of vibrations of the atoms varies with the temperature
    B. the electron density varies with the temperature
    C. the magnetic properties changes with the variation of temperature
    D. all of the above
Ans.: A
 
Q. 15 Which of the following determines the conductivity of a metals?
    A. the electron concentration
    B. the mobility of the free electrons
    C. the number of valance electrons per atom
    D. Both A and B
Ans.: D

 

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