Showing posts with label multiple choice. Show all posts
Showing posts with label multiple choice. Show all posts

Monday 21 July 2014

SAMPLE SHEET: GATE 2015; STRENGTH OF MATERIALS (MECHANICAL ENGINEERING)

CRACKGATE EDUCATION
House No: 237; Sector – 5; Chiranjeev Vihar, Ghaziabad
                     Contact No : #9555921800
PRACTICE WORKSHEET GATE-2015
MECHANICAL ENGINEERING
TOPIC: STRENGTH OF MATERIALS
Difficulty Level: 1
SET ONE: Each question has several entries, choose the most appropriate one

01)  The intensity of stress which causes unit strain is called
            a) unit stress                                                     b) bulk modulus
            c) modulus of elasticity                                               d) principal stress
02)  Which of the following materials has poisson’s ratio more than unity
            a) steel                                                                         b) copper
            c) cast iron                                                       d) none of these
03) The change in the unit volume of a material under tension with increase in its Poisson’s ratio will
            a) increase                                                       b) decrease
            c) increase initially and then decrease              d) remain same
04) In a tensile test, near the elastic zone, the tensile strain
            a) increases more quickly                                b) decreases more quickly
            c) increases in proportion to the stress                         d) increases more slowly
05) The stress necessary to initiate yielding is
            a) considerably greater than that necessary to continue it
            b) considerably lesser than that necessary to continue it
            c) remain same to continue it
            d) can’t be predicted
06) Flow stress corresponds to
            a) fluids in motion                                           b) breaking point
            c) plastic deformation of solids                                   d) rupture stress
07) The maximum strain energy that can be stored in a body is known as
            a) impact energy                                              b) resilience
            c) proof resilience                                            d) modulus of resilience
08) Thermal stress is always
            a) tensile                                                          b) compressive
            c) tensile or compressive                                 d) none of these
09) The loss of strength in compression due to overloading is known as
            a) hysteresis                                                     b) relaxation
            c) creep                                                            d) Bouschinger effect
10) If a material expands freely due to heating, it will develop
            a) thermal stress                                               b) lateral stress
            c) creep stress                                                  d) no stress


SAMPLE SHEET: GATE 2015; FLUID MECHANICS (MECHANICAL ENGINEERING)

CRACKGATE EDUCATION
House No: 237; Sector – 5; Chiranjeev Vihar, Ghaziabad
                     Contact No : 09678534833; 09555921800
PRACTICE WORKSHEET GATE-2015
MECHANICAL ENGINEERING
TOPIC: FLUID MECHANICS
Difficulty Level: 1
SET ONE: Each question has several entries, choose the most appropriate one

01) If no resistance is encountered due to displacement then such a substance is called
            a) fluid               b) real gas                 c) ideal fluid          d) visco-elastic fluid

02) The volumetric change of a fluid due to a resistance is called as
            a) volumetric strain,                             b) volumetric index
            c) compressibility                                d) cohesion

03) Mercury does not wet glass due to a property of liquids known as
            a) adhesion                                          b) cohesion
            c) viscosity                                          d) surface tension

04) The surface tension of Mercury at normal temperature compared to that of water is
            a) more                                                          b) less
            c) depends upon the glass tube                        d) equal

05) Kinematic viscosity is dependent upon
            a) pressure       b) distance       c) density         d) flow

06) Alcohol is used in manometers because
            a) it is clearly visible                            b) it provides suitable meniscus
            c) it can provide longer column due to its low density
            d) it has low surface tension

07) The buoyancy depends upon
            a) mass of liquid displaced                  b) viscosity of the liquid
            c) pressure of the displaced liquid       d) none of the above

08) The centre of gravity of the volume of the liquid displaced by an immersed body is called
            a) meta-centre                                      b) centre of gravity
            c) centre of pressure                            d) centre of buoyancy

09) Surface energy per unit area of a surface is numerically equal to
            a) atmospheric pressure                                   b) surface tension
            c) force of cohesion                                         d)  viscosity

10) Flow occurring in a pipeline when a valve is being opened is
            a) steady flow                                                 b) unsteady flow
            c) laminar flow                                                d) vortex flow

For answers contact at 09555921800

Thursday 17 July 2014

SAMPLE SHEET: GATE 2015; THERMODYNAMICS (MECHANICAL ENGINEERING)

CRACKGATE EDUCATION
House No: 237; Sector – 5; Chiranjeev Vihar, Ghaziabad
                     Contact No : #9555921800
PRACTICE WORKSHEET GATE-2015
MECHANICAL ENGINEERING
TOPIC: BASIC THERMODYNAMICS
Difficulty Level: 1
SET ONE: Each question has several entries, choose the most appropriate one

01) Gas laws are applicable to
            a) Gases as well as vapours     b) Gases alone and not applicable to vapours
            c) Gases and Steam                  d) Gases and Superheated vapours

02) An ideal gas compared to a real gas at very high pressures occupies
            a) more volume           b) less volume            
c) same volume           d) can’t be predicted

03) Temperature of a gas is produced due to
            a) its heating value                   b) kinetic energy of the molecules
            c) molecular vibration              d) inter-molecular attractions

04)  According to kinetic theory of gases, the absolute zero temperature is attained when
            a) volume of the gas is zero                             b) pressure of the gas is zero
            c) kinetic energy of the molecule is zero                     d)  specific heat is zero 

05)  The quantity δQ – δW; where δQ is elemental heat transfer and δW is the elemental work    
transfer is
            a) path function                       b) point function
            c) cyclic function                     d) in-exact differential

06)  The workdone in an adiabatic process between a given pair of end states depends on
            a) the values of the endstates only,      b) the end states and specific heat ratio  γ
            c) the end states and polytropic index n,          d) none of the above.

07)  If the value of polytropic index n is high, then the compressor work between given pressure limits will be
            a) less                                      b) more
            c) no effect                              d) zero

08)  A perfect gas at 27oC is heated at constant pressure till its volume becomes double. The final temperature will be
            a) 54oC                                    b) 327oC
            c) 108oC                                  d) 600oC
09)  Mixing of ice and water at 0oC at atmospheric pressure is an example of
            a) reversible process                b) irreversible process
            c) quasi-static process              d) isentropic process
10)  Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant
            a) pressure                               b) temperature

            c) volume                                d) entropy

Sunday 5 December 2010

SOLUTION OF PRESEMESTER EXAMINATION: ENGINEERING MECHANICS

SOLUTION OF PRESEMESTER EXAMINATION:
ENGINEERING MECHANICS

©subhankar_karmakar

GROUP-A

Q.1 Answer the following questions as per the instructions 2x20=20

Choose the correct answer of the following questions:

(i) A truss hinged at one end, supported on rollers at the other, is subjected to horizontals load only. Its reaction at the hinged end will be

(a) Horizontal;                   (b) Vertical
(c) Both horizontal & vertical
(d) None of the above.

Ans: (c) both horizontal & vertical


(ii) The moment of inertia of a circular section of diameter D about its centroidal axis is given by the expression

(a) π(D)4/16           (b) π(D)4/32
(c) π(D)4/64           (d) π(D)4/4

Ans: (c) π(D)4/64


Fill in the blanks in the following questions:


(iii)The distance of the centroid of an equilateral triangle with each side(a) is …………. from any of the three sides.

Ans a /(2√3)


(iv)Poisson’s ratio is defined as the ratio between ……. and ………… .

Ans: Lateral Strain, Longitudinal Strain


(v)If two forces of equal magnitudes P having an angle 2Ө between them, then their resultant force will be equal to ________ .

Ans: 2P CosӨ


Choose the correct word/s.

(vi) Two equal and opposite force acting at different points of a rigid body is termed as (Bending Moment/ Torque/ Couple).

Ans: Couple







Choose correct answer for the following parts:


(vii) Statement 1:

In stress strain graph of a ductile material, yield point starts at the end of the elastic limit.

Statement 2:

At yielding point, the deformation becomes plastic by nature.

(a) Statement 1 is true, Statement 2 is true.
(b) Statement 1 is true, Statement 2 is true and they are unrelated with each other
(c) Statement 1 is true, statement 2 is false.
(d) Statement 1 is false, Statement 2 is false.

Ans: (a) Statement 1 is true, Statement 2 is true.


(viii) Statement 1:

It is easier to pull a body on a rough surface than to push the body on the same surface.

Statement 2:

Frictional force always depends upon the magnitude of the normal force.

(a) Statement 1 is true, Statement 2 is true.
(b) Statement 1 is true, Statement 2 is true and they are unrelated
(c) Statement 1 is true, statement 2 is false.
(d) Statement 1 is false, Statement 2 is false.

Ans: (a) Statement 1 is true, Statement 2 is true.


(ix) In a cantilever bending moment is maximum at

(a) free end            (b) fixed end
(c) at the mid span (d) none of these

Ans: (b) fixed end


(x) The relationship between linear velocity and angular velocity of a cycle

(a) exists under all conditions
(b) does not exist under all conditions
(c) exists only when it moves on horizontal plane.
(d) none of these

Ans: (a) exists under all conditions
NEXT ARTICLE
SOLUTION OF PRESEMESTER EXAMINATION:
ENGINEERING MECHANICS PART-II

©subhankar_karmakar

Monday 22 November 2010

MULTIPLE CHOICES : ENGG MECHANICS
Sub: Engineering Mechanics, Sub Code: EME-202,
Semester: 2nd Sem, Course: B.Tech,

MULTIPLE CHOICES : ENGG MECHANICS - text
MULTIPLE CHOICES:
sub: ENGINEERING MECHANICS

Sub Code: EME - 102 /201
B.Tech First Semester (all branch)
University: UPTU (GBTU), Lucknow, Uttar Pradesh
OBJECTIVE TYPE QUESTIONS

PROBLEM SET - 1

Q1) If the coefficients of friction of an inclined plane be (1/√3), then the angle of repose of the plane will be
a) 90° b) 60° c) 45° d)30°

Q2) Three forces of equal magnitude acts along the side of an equilateral triangle, then the body will be in
a) static equilibrium                                 b) dynamic equilibrium
c) translational motion                             d) rotational motion.

Q3) (1/2).E.e² is called
a) total strain energy                                  b) resilience
c) dynamic loading energy                          d) none of this

Q4) The ratio of shear stress and shear strain is known as,
a) modulus of elasticity                                      b) poissons' ratio
c) modulus of rigidity                                         d) bulk modulus

Q5) The bending moment curves generated by UVL is,
a) parabolic                                          b) straight line
c) cubic                                                d) constant

Q6) The centroidal moment of inertia of a quarter circle lamina is
a) 0.11r4                                              b) 0.05r4
c) 0.4242r4                                          d) 0.5868r4

Q7) The Point of Contraflexure is a point in the beam where
a) shear force is zero                        
b) bending moment is zero
c) bending moment is zero and it changes sign
d) none of these

Q8) If a body of mass M is moving with an acceleration (a) then the Inertial Force on the body is equals to
a) -Ma          b) Ma        c) |Ma|     d) none of these

Q9) A truss is made of seven linkages and five joints, then the truss is
a) deficient                                              b) redundant
c) perfect                                                d) none of these

Q10) A beam has 3 no.s of supports is known as
a) cantilever beam
b) continuous beam
c) overhanging beam
d) simply supported beam


PROBLEM SET - 2:

Q1) The maximum value of frictional force that comes into play when a body tends to move on a surface called:
a) sliding friction,                                   b) limiting friction,
c) milling friction,                                   d) none of these.

2) The ratio of static friction to dynamic friction is:
a) less than 1,                                      b) equal to 1,
c) greater than 1,                                 d) none of these.

3) The angle of friction is equal to the:
a) ratio of frictional force to the normal reaction.
b) angle of inclined plane when a body tends to slide down.
c) angle of an inclined plane when a body is sliding.
d) none of these.

Q.4) A particle is moving along a circle with constant speed. The acceleration of the particle is:
a. along the circumference                      b. along the tangent
c. along the radius                                 d. zero

Q.5) The area moment of inertia of a quarter circle of radius (r) about the centroidal
axes is
a. (0.055r2)                                        b. (0.11r2)/3
c. (πr2)/4                                           d. π.r2

Q.6) The centroid of a semi circular area of radius r is
a. (r, 3r/4π )                                      b. ( r, 2r/π)
c. (r/π, r)                                           d. (r, r/2π)

Q.7) In the truss analysis, if the no. of linkages is 12 and the no. of joints is 7, then
a. perfect truss                            b. redundant truss
c. deficient truss                          d. indeterminate truss

Q.8) When shear force is zero at a point in a beam, bending moment at a certain point is,
a. zero                                                 b. maximum
c. minimum                                          d. increasing

Q.9) The mass moment of inertia of a solid sphere of mass M and radius R about an diameter of the sphere will be
a. (1/5).M.R2              b. (2/5).M.R4           c. (2/5).M.R2       d. (1/5).M.R4

Q.10) In a simply supported beam of length L, a concentrated load W acts at the mid span, the maximum bending moment would be
a. W.L/4                                                   b. W.L2
c. W.L/2                                                   d. 0

PROBLEM SET - 3

Q1) A couple can be balanced by
a) a direct Force                                    b) a moment
c) a torque                                            d) an equal and opposite couple.

Q2) Opening a Cold drinks bottle, one has to apply
a) a moment                                            b) a torque
c) parallel forces                                      d) a couple

Q3) A truss is said to be plane truss if
a) all the members lies in one plane
b) any two members lies in one plane
c) all the members are perpendicular to one plane
d) none of these

Q4) The ratio of frictional force normal reaction is called
a) angle of repose
b) angle of friction
c) limiting friction
d) coefficient of friction

Q5) Yielding means
a) elastic deformation
b) plastic deformation
c) fatigue failure
d) shear failure

Q6) The force required to move a body up an inclined plane will be least when the angle of inclination is:
a) equal to friction angle,
b) greater than friction angle,
c) less than friction angle,
d) none of these.

Q7) In a cantilever beam loaded with a point load at the free end, has maximum bending moment,

(i) free end,                                            (ii) fixed end,
(iii) at the mid span,                                (iv) none of the above.

Q8) An idealized truss can only be loaded at
a) only at the mid point of the linkages
b) only at the joints
c) both at the mid points and joints
d) none of the above

Q9) UTM can be used to find
a) Modulus of Elasticity
b) compressive breaking strength
c) ultimate tensile strength
d) all of the above

||| the question paper is made by subhankar karmakar, 2011 |||

Q10) Bulk Modulus is defined as the ratio between
(i) linear stress and strain,                 (ii) shear stress and strain,
(iii) volumetric stress and strain,        (iv) none of the above.

PROBLEM SET - 4:

Q.1 Answer the following questions as per the instructions 2x20=20

Choose the correct answer of the following Questions:

(i) The magnitudes of the force of friction between two bodies, one lying above the another depends upon the roughness of the
(a) Upper body                               (b) Lower body
(c) Both the body                           (d) The body having more roughness

(ii) The moment of inertia of a circular section of diameter D about its centroidal axis is given by the expression
(a) π(D)4/16
(b) π(D)4/32
(c) π(D)4/64
(d) π(D)4/4

Fill in the blanks in the following questions:

(iii) The distance of the centroid of an equilateral triangle with each side (a) is …………. From any of the three sides.

(iv) Poisson’s ratio is defined as the ratio between ……………. and…………………………

(v) If two forces of equal magnitudes P having an angle 2Ө between them, then their resultant force will be equal to ________

Match the following columns for the following two parts:

(vi) Match the column I to an entry from the column II:

COLUMN I----                            ---COLUMN II

(i) BMD of an UDL                      (a) stored strain energy per unit volume
(ii)Resilience is                            (b) brittle materials
(iii) Bulk Modulus                        (c) parabolic in nature
(iv) YieldPoint                             (d) volumetric stress and strain
                                                  (e) Ductile materials
                                                  (f) Shear stress

(vii) Match the Following columns:

COLUMN I  ------------------       COLUMN II

(i) Square of side b                                              (p) π b4 / 64

(ii) Equilateral Triangle of side b                           (q) b4 / 12

(iii) Circle of diameter b                                       (r) b4/ 36

(iv) Isosceles right angle triangle of base b            (s) b4/(32√3)

Column II gives the value of Moment of Inertia Ixx about a centroidal axis.

Choose correct answer for the following parts:

(viii) Statement 1:
In stress strain graph of a ductile material, yield point starts at the end of the elastic limit.
Statement 2:
At yielding point, the deformation becomes plastic by nature.

(i) Statement 1 is true, Statement 2 is true.
(ii) Statement 1 is true, Statement 2 is true and they are unrelated with each other
(iii) Statement 1 is true, statement 2 is false.
(iv) Statement 1 is false, Statement 2 is false.

(ix) Statement 1:
It is easier to pull a body on a rough surface than to push the body on the same surface.
Statement 2:
Frictional force always depends upon the magnitude of the normal force.
(i)Statement 1 is true, Statement 2 is true.
(ii)Statement 1 is true, Statement 2 is true and they are unrelated with each other
(iii) Statement 1 is true, statement 2 is false.
(iv) Statement 1 is false, Statement 2 is false.

Choose the correct word/s.
(x) Two equal and opposite force acting at different points of a rigid body
is termed as (Bending Moment/ Torque/ Couple).

PROBLEM SET - 5

Q.1) The example of Statically indeterminate structures are,

a. continuous beam,
b. cantilever beam,
c. over-hanging beam,
d. both cantilever and fixed beam.

Q.2) A redundant truss is defined by the truss satisfying the equation,
a. m = 2j - 3,
b. m < 2j + 3,
c. m > 2j - 3,
d. m > 2j + 3

Q.3) The property of a material to withstand a sudden impact or shock is called,
a. hardness                                           b. ductility,
c. toughness,                                        d. elasticity  of the material

Q.4) The ratio of the stress generated by a dynamic loading to the stress developed by the gradually applying the same load is
a) 1           b) 2               c) 3                    d) none of the above

Q.5) The ratio between the volumetric stress to the volumetric strain is called as
a. young's modulus
b. modulus of elasticity
c. rigidity modulus,
d. bulk modulus

Q.6) In a Cantilever beam, the maximum bending moment is induced at
a. at the free end
b. at the fixed end
c. at the mid span of the beam
d. none of the above

Q.7) The forces which meet at a point are called
a. collinear forces
b. concurrent forces
c. coplanar forces
d. parallel forces

Q.8) The coefficients of friction depends upon
a. nature of the surface
b. shape of the surface
c. area of the contact surface
d. weight of the body

Q.9) The variation of shear force due to a triangular load on simply supported beam is
a. uniform                                                       b. linear
c. parabolic                                                     d. cubic

Q.10) A body is on the point of sliding down an inclined plane under its own weight. If the inclination of the plane is 30 degree, then the coefficient of friction between the planes will be
a. (1/3)        b. 3            c. 1            d. 0

PROBLEM SET - 6:

Q.1) Moment of Inertia of a body means
a) The resistance of the body against any movement or the tendency of movement of the body
b) The resistance of the body against any rotation of the body about a certain point
c) The force multiplied by the distance of the force from the body
d) None of these

Q.2) A truss is a
a) load bearing structure
b) framed mechanical structure
c) structure made of linkages and joints
d) all of the above

Q.3) The type of joints that can resist a moment is called as
a. roller joint                                            b. pin joint
c. hinged joint                                          d. fixed joint

Q.4) The slope of the normal stress-strain graph is equal to the
a. modulus of rigidity
b. bulk modulus
c. modulus of elasticity
d. stiffness constant.

Q.5) The shear stress in a circular shaft under torsion varies
a. linearly                                                  b. parabolically
c. hyperbolically                                        d. uniformly

Q.6) If for a material poissons ratio is 0.2 and modulus of elasticity is 200 GPa, then the value of modulus of rigidity would be
a) 100.33 GPa                                          b) 93.33 GPa
c) 83.33 GPa                                            d) 100 GPa

Q.7) If the section modulus of a beam decreases, then bending stress will
a. decrease                                   b. increase
c. remain same                             d. bending stress is independent of section modulus

Q.8) Which one of the following statements is correct?
a. Energy and work are scalars
b. Force and work are vectors
c. Energy, momentum and velocity are vectors
d. Force, momentum and velocity are scalars

Q.9) Stress may be defined as:
a. load per unit area
b. external force per unit area
c. internal resistance per unit area
d. same as pressure

Q.10) Hooke's law is valid up to the
a. yield point                                           b. elastic limit
c. proportional limit                                 d. ultimate point.

PROBLEM SET - 7:

Q.1) The first law of motion provides the definition of
a. momentum                                         b. force
c. energy                                               d. acceleration

Q.2) A man in a lift will weigh more when the lift is
a. accelerated upwards
b. accelerated downwards
c. descends freely
d. lift going up is slowing down

Q.3) The motion of a bicycle wheel is
a. linear                                                   b. rotary
c. translatory                                           d. rotary as well as translatory

Q.4) A particle is moving along a circle with constant speed. The acceleration of the particle is :
a. along the circumference
b. along the tangent
c. along the radius
d. zero

Q.5) The mass moment of inertia of a thin disc of mass (m) and radius (r) about the centroidal axes is
a. (m.r2)/2                                                  b. (m.r2)/3
c. (m.r2)/4                                                  d. m.r2

Q.6) The centroid of a semi circular arc of radius r is
a. (3r)/π                                                     b. 2r/π
c. r/π                                                        d. r/(2π)

Q.7) In the method of sections for trusses, the section must be passed so as to cut not more than
a. two members
b. three members
c. four members
d. five members

Q.8) When bending moment at a certain point is maximum, shear force is
a. zero b. maximum
c. minimum d. increasing

Q.9) The mass moment of inertia of a solid sphere of mass M and radius R about an diameter of the sphere will be
a. (1/5).M.R2
b. (2/5).M.R4
c. (2/5).M.R2
d. (1/5).M.R4

Q.10) In a cantilever beam of length L, a concentrated load W acts at the free end, the bending moment at the free end would be
a. W.L                              b. W.L2
c. (W.L)/2                         d. 0

Multiple Choice type Question:

TOPIC : FRICTION

1) The maximum value of frictional force that comes into play when a body tends to move on a surface called :
a) sliding friction,
b) limiting friction,
c) milling friction,
d) none of these.

2) The ratio of static friction to dynamic friction is :
a) less than 1,
b) equal to 1,
c) greater than 1,
d) none of these.

3) The angle of friction is equal to the :
a) ratio of frictional force to the normal reaction.
b) angle of inclined plane when a body tends to slide down.
c) angle of an inclined plane when a body is sliding.
d) none of these.

4) The coefficient of friction depends upon :
a) area of contact,
b) shape of the body,
c) nature of contact surfaces,
d) none of these.

5) Kinetic friction is :
a) limiting friction,
b) friction when a body is moving,
c) friction when a body is stationary,
d) none of these.

©subhankar_karmakar

PROBLEM SET - 8

Q1) The enclosed area in the shear force diagram for a beam is the magnitude of
a) shear force
b) bending moment
c) applied load
d) bending stress.

Q2) If a particle is moving in a circular path at constant velocity on a plane, then the direction of the angular velocity will be
a) along the tangent to the circular path
b) along the radial direction
c) normal to the plane
d) none of this.

There will be 2 statements, which may be right or may be wrong, read those sentences and then choose the right choice

Q3) statement 1: Two forces act on a particle are collinear forces.
statement 2: The ratio of longitudinal strain and lateral strain is the value of poisson's ratio.

a) both of them are true
b) statement 1 is true, but statement 2 is false
c) statemen 2 is true while stateme 1 is false
d) both of them are false.