MESL 3 Flashcards
1
Q
Gauss-Seidel iterative method can be used for solving a set of _______.
a. Linear algebraic equations only
b. Both linear and non-linear algebraic equations
c. Both linear and non-linear differential equations
d. Non- linear differential equation only
A
Linear algebraic equations only
2
Q
Is kind of force acting on an object which is defined as the vector sum of all force acting on the object.
a. Net force
b. Gross force
c. Total force
d. Contact force
A
Net force
3
Q
For a given function, it is found that f(t) = f(-t). What type of symmetry does f(t) have?
a. rotational symmetry
b. quarter-wave symmetry
c. odd symmetry
d. even symmetry
A
Even symmetry
4
Q
All the diagonal elements of skew-symmetric matrix are ________.
a. real
b. pure imaginary
c. zero
d. None of these
A
Zero
5
Q
A polygon with 10 sides is said to be ________.
a. decahedron
b. dodecagon
c. dodecahedron
d. decagon
A
Decagon
6
Q
A line that meets a plane but is not perpendicular to it in relation to the plane _______.
a. Oblique
b. collinear
c. Coplanar
d. Parallel
A
Oblique
7
Q
How do you call the distance of a point from the y-axis?
a. coordinates
b. ordinate
c. polar distance
d. Abscissa
A
Abscissa
8
Q
Which of the following is not a central conic?
a. hyperbola
b. parabola
c. ellipse
d. oblique
A
Parabola
9
Q
A type of bond which does not have security except a promise to pay by issuing corporation.
a. collateral trust bond
b. debenture
c. registered bond
d. coupon bond
A
Debenture
10
Q
A type of bond issued jointly by two or more corporations.
a. collateral trust bond
b. registered bond
c. joint bond
d. debenture bond
A
Joint bond
11
Q
If the security of the bond is a mortgage on certain specified asset of a corporation, this bond is classified as ________.
a. mortgage bond
b. registered bond
c. preferred bond
d. all of these
A
Mortgage bond
12
Q
A possible or chance events which when they occur will involve a large amount of expenditures.
a. Contingencies
b. Contract
c. Exaggerated
d. Lease
A
Contingencies
13
Q
A body falling from a height of 20 m rebounds from hard floor. If it loses 25% energy in the impact, then coefficient of restitution is _______.
a. 0.86
b. 0.52
c. 0.43
d. 0.18
A
0.86
14
Q
Which of the following best describes a scientific law?
a. It implies experimentation results.
b. It summarizes observed acts.
c. It describes and describes physical results.
d. It implies experimentation results.
A
It summarizes observed acts
15
Q
All forms of matter are composed of the same building blocks called _______.
a. Atom
b. Ions
c. Protons
d. Elements
A
Atoms
16
Q
Which of the following is NOT a characteristic of non-metals?
a. Non-metals are oxidizing agents.
b. Non-metals has negative oxidation number
c. Non-metals form positive ions.
d. Non-metals have high electron affinities
A
Non-metals form positive ions
17
Q
An acid can react with a base to produce a _______.
a. Oxide
b. Hydroxide
c. Hydrogen
d. Salt
A
Salt
18
Q
The product of force and the time during which it acts is known as ________.
a. work
b. impulse
c. impact
d. momentum
A
impulse
19
Q
In physics, work is defined in terms of the force acting through a distance. The rate at which the work is done is called ________.
a. energy
b. momentum
c. power
d. force
A
power
20
Q
A wire is suspended vertically from ceiling by attaching a weight of 100 N to the lower end. The weight stretches the wire by 2mm. The clastic potential energy stored in the wire is ________.
a. 0.1 J
b. 0.2 J
c. 2 J
d. 20 J
A
0.1 J
21
Q
If the colliding object has a mass less than that of the stationary target, after impact the ________.
a. the colliding object continues its motion in the same direction with reduced speed
b. the lighter object bounces off the heavier one
c. colliding object stops
d. the colliding object continues its motion in the same direction with the same speed
A
the lighter object bounces off the heavier one
22
Q
With one fixed end and other free end, a column of length ‘L’ buckles at load Pl. Another column of same length and same cross-section fixed at both ends bucklers at load P2. The ratio of P2/P1 is ________.
a. 4
b. 8
c. 16
d. 18
A
16
23
Q
The Poisson’ s ratio of a material which has Young’ s modular of 120 GPa and shear modulus of 50 GPa is ________.
a. 0.2
b. 0.4
c. 0.5
d. 0.8
A
0.2
24
Q
The deformation of a bar under its own weight as compared to that when subjected to a direct axial load equal to its own weight will be ________.
a. one fourth
b. half
c. double
d. the same
A
half
25
In the case of biaxial state of normal stresses, the maximum shear stress is equal to ________.
a. half the difference of normal stresses
b. half the sum of normal stresses
c. the sum of the normal stresses
d. the difference of normal stresses
the difference of normal stresses
26
What is the ratio of average shear stress to the maximum shear stress in a beam with a square cross section?
a. 1/4
b. 1
c. 2/3
d. 1/3
2/3
27
The phase gap between displacement and disturbing force, in case of resonance is ________.
a. 30°
b. 60°
c. 90°
d. 180°
90°
28
Castellated beams are used for ________.
a. Loads net passing through the shear center
b. Section subjected to alternate compressive and shear stress
c. Resisting bending moment only
d. Light construction
Light construction
29
Only throttling calorimeter is used for measuring ________.
a. dryness fraction of only high pressure steam
b. dryness fraction of only low pressure steam
c. very high dryness fraction up to 0.98
d. very low dryness fraction up to 0.7
very high dryness fraction up to 0.98
30
If a process can be stopped at any stage and reverse so that the system and surroundings are exactly restored to their initial states, it is known as _______.
a. isothermal process
b. frictionless process
c. adiabatic process
d. ideal process
ideal process
31
An important characteristics of fluid property involved in the phenomenon of cavitation.
a. temperature
b. surface tension
c. vapor pressure
d. viscosity
vapor pressure
32
What is the correct sequence in ascending order of the magnitude of the given parameters?
a. momentum thickness, boundary layer thickness, displacement thickness
b. momentum thickness, displacement thickness, boundary layer thickness
c. boundary layer thickness, momentum thickness, displacement thickness
d. displacement thickness, boundary layer thickness, momentum thickness
momentum thickness, displacement thickness, boundary layer thickness
33
Which of these statements is/are correct?
1. Piezometer is used to measure small variation of pressure above or below ambient pressure
2. Thixotropic fluid exhibits decrease in viscosity with time.
a. Only 1
b. only 2
c. Neither 1 nor 2
d. Both 1 and 2
Both 1 and 2
34
In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness would ________.
a. increase gradually
b. tend to decrease
c. remain constant
d. increase rapidly
tend to decrease
35
Irrotational flow occurs when ________.
a. there is no net rotation of the fluid element about its mass center
b. fluid element does not undergo any change in size or shape
c. flow takes place in a duct of uniform cross-section at constant mass flow rate
d. streamlines are curved
there is no net rotation of the fluid element about its mass center
36
What is the ratio of the number of moles of one component of a solution to the total number of moles of all the components?
a. Formality
b. Mole fraction
c. Molarity
d. Molality
Mole fraction
37
Theoretical discharge through a trapezoidal notch or weir is given by ________.
a. Discharge through rectangular notch + Discharge through rectangular notch
b. Discharge through rectangular notch + Discharge through triangular notch
c. Discharge through rectangular notch -Discharge through triangular notch
d. Discharge through rectangular notch - Discharge through rectangular notch
Discharge through rectangular notch + Discharge through triangular notch
38
Which of the following ratios describes Reynolds number?
a. drag forces/buoyant forces
b. viscous forces/drag forces
c. buoyant forces/inertial forces
d. inertial forces/viscous forces
inertial forces/viscous forces
39
In a floating body, what do you call the distance between the center of gravity and the metacenter?
a. metacentric head
b. metacentric height
c. submerged height
d. buoyancy head
metacentric height
40
As the pressure increases, the heat of vaporization per pound of water _______.
a. decreases
b. increases
c. first increases then decreases
d. remains constant
decreases
41
Let X be a random variable following normal distribution with mean +1 and variance 4. Let Y be another normal variable with -1 and variance unknown. If P (X ≤ -1) = P (X ≥ 2), the standard deviation of Y is ________.
a. 1
b. 2
c. 3
d. 4
3
42
According to the law of equilibrium, two forces are said to be in an equilibrium only if they are ________.
a. collinear in action
b. equal in magnitude and opposite in direction
c. opposite in direction
d. both (a) and (b)
both (a) and (b)
43
When two rows are interchanged in position, the value of the determinant will ________.
a. Become zero
b. Become infinite value
c. Be multiplied by -1
d. Remain unchanged
Be multiplied by -1
44
If A and B are square matrices of equal degree, then which one is correct among the following?
a. A + B = A – B
b. AB = BA
c. A + B = B + A
d. A – B = B – A
A + B = B + A
45
The matrix obtained from a given matrix by changing rows into columns is called ________.
a. skew-symmetric matrix
b. symmetric matrix
c. orthogonal matrix
d. None of these
None of these
46
To find the angle of a triangle, given only the lengths of the sides, what is the best and appropriate law to use?
a. law of tangents
b. law of cotangents
c. law of cosines
d. law of sines
law of cosines
47
What is the best statement for elastic collision?
a. the initial kinetic energy is equal to the final kinetic energy
b. the initial kinetic energy is greater than to the final kinetic energy
c. the final kinetic energy is less than the initial kinetic energy
d. the kinetic energy remains constant
the initial kinetic energy is equal to the final kinetic energy
48
The point of concurrency of the perpendicular bisector of the sides of the triangle is called _______.
a. Centroid
b. Circumference
c. Orthocenter
d. Circumcenter
Circumcenter
49
Any combination of symbols and numbers related by the fundamental operation of algebra is called a/an ________.
a. Algebraic sum
b. Algebraic expression
c. Algebraic equation
d. Equation
Algebraic expression
50
If P is a square matrix, then the matrix P+P is ________.
a. horizontal
b. skew-symmetric
c. symmetric
d. diagonal
horizontal
51
The logarithm of the negative number is ________.
a. irrational
b. notional
c. rational
d. Imaginary
Imaginary
52
The conic equation x^2 + y^2 + Dx + Ey + F = 0 represents ________.
a. circle
b. Parabola
c. hyperbola
d. ellipse
hyperbola
53
A parabola has an eccentricity ________.
a. Equal to 1
b. Less than 1
c. Brake even
d. Greater than 1
Equal to 1
54
A conic characterized by locus of a moving point in a plane so that the difference of its distance from two fixed point (foci) is constant.
a. parabola
b. circle
c. hyperbola
d. ellipse
hyperbola
55
A conic section sharing a common focus. For example, an ellipse and a hyperbola having same foci.
a. Confocal
b. Central conics
c. Median conics
d. Quartic conics
Confocal
56
The plane curve traced out by a fixed point on the circle as the circle rolls along a line.
a. Cycloid
b. Hypocycloid
c. Epicycloids
d. Lemniscates
Cycloid
57
A plane curved traced by a fixed point on a circle as is rolls along inside of a fixed circle.
a. Lemniscates
b. Cycloid
c. Hypocycloid
d. Epicycloids
Hypocycloid
58
The process of repaying the net investment that has been put into a project. This includes net salvage, interest and principal repayment.
a. Return of investment
b. Investment cost
c. Over-all cost
d. Capital Recovery
Capital Recovery
59
Expressed as a percentage per time (% per year), it is an increase in the amount of money required to purchase the same amount of goods or services over time.
a. Inflation
b. Depletion
c. Expansion
d. Reduction
Reduction
60
The term used to express the series of uniform payments occurring at equal interval of time is called ________.
a. Penalty
b. Depreciation
c. Annuity
d. Perpetuity
Annuity
61
What is an estimate of asset' s net market value at the end of its estimated life?
a. Book value
b. Cash flow
c. Salvage value
d. Depreciation
Salvage value
62
Which of the following law states that "When free competition exist the price of a product will be that value where supply is equal to the demand"?
a. law of supply
b. Law of diminishing return
c. law of demand
d. law of supply and demand
law of supply and demand
63
What is the common unit used to indicate the mass of a particle?
a. Atomic mass unit (amu)
b. Charge unit
c. imperial unit
d. SI unit
Atomic mass unit (amu)
64
What is the unit for the charge of a particle?
a. SI unit
b. Charge unit
c. imperial unit
d. Atomic mass unit
Charge unit
65
The human body is composed of how many percent oxygen?
a. 55%
b. 50%
c. 65%
d. 60%
65%
66
The procedure for separating a liquid from a mixture by vaporizing the liquid and condensing the vapor is called _______.
a. Maturization
b. Purification
c. Evaporation
d. Distillation
Distillation
67
What will happen to the momentum of a body if the velocity doubled in value?
a. will also doubled
b. will tripled
c. stays the same
d. will decrease by haft
will also doubled
68
For perfectly elastic collision, the coefficient of restitution (e) is equal to ________.
a. certain constant
b. 1
c. negative value
d. 0
1
69
A cantilever beam turned in place and subjected to lateral loads will develop ________ at any section.
a. Bending moment and sharing force
b. Bending moment, twisting moment and shar force
c. Bending moment and shearing force
d. Bending moment and twisting force
Bending moment and twisting force
70
There are two points P and Q on a planar rigid body, what is the best statement for the relative velocity between the two points?
a. should always be along PQ
b. can be oriented along any direction
c. should always be perpendicular to PQ
d. should be along QP when the body undergoes pure translation
can be oriented along any direction
71
Two beams, one having square cross-section and another circular cross-section are subjected to the same amount of bending moment. If the cross-sectional are as well as the material of both the beams are the same, what is the best statement to describe this?
a. as the material is same both the beams will experience same deformation
b. minimum bending stresses developed in both the beams are the same
c. the square beam experiences more bending stress than the circular one
d. the circular beam experiences more bending stress than the circular one
the circular beam experiences more bending stress than the circular one
72
A steel rod of length l and diameter d, fixed at both ends is uniformly heated to a temperature rise of delta T (ΔT). The Young' s modulus is E and the coefficient of linear expansion is α. The thermal stress in the rod is equal _______.
a. EαΔT
b. αΔTl
c. αΔT
d. EαΔTl
EαΔT
73
The basic assumption of the plane section normal to the new axis before bending, remaining plane and normal to neutral axis after bending leads to _______.
a. uniform strain over the beam cross-section
b. linearly varying strain
c. linearly hold strain
d. uniform stress under the cross- section
uniform strain over the beam cross-section
74
A certain body in motion is subjected to coriolis acceleration, which of the following best describe the situation?
a. in plane translation with variable velocity
b. in plane motion which is a resultant of plane reconstruction and rotation
c. restrained to rotate while sliding over another body
d. in plane rotation with variable velocity
restrained to rotate while sliding over another body
75
The main cause of the irreversibility in a system is called ________.
a. unrestricted expansion
b. heat transfer with a finite temperature difference
c. mechanical and fluid friction
d. All of the above
All of the above
76
If all the variables of a stream are independent of time it is said to be in _______.
a. steady flow
b. open flow
c. closed flow
d. unsteady flow
steady flow
77
The state of substance whose evaporation from its liquid state is complete is known as _______.
a. vapor
b. steam
c. perfect gas
d. air
perfect gas
78
In SI units, the value of the universal gas constant is _______.
a. 8314 J/moIe/K
b. 831.4 J/mole/K
c. 0.8314 J/moIe/K
d. 83.14 J/mole/K
8314 J/moIe/K
79
The ideal gas constant (R) is equal to the _______.
a. Cp x Cv
b. Cp – Cv
c. Cp + Cv
d. Cp / Cv
Cp – Cv
80
When is Bernoulli' s equation applicable between any to points in a flow field?
a. The flow is steady, compressible and irrotational
b. The flow is unsteady, incompressible and irrotational
c. The flow is steady, incompressible and irrotational
d. The flow is unsteady, incompressible and rotational
The flow is steady, incompressible and irrotational
81
A beaker of water is falling freely under the influence of gravity. Point B is on the surface and point C is vertically below B near the bottom of the beaker. If PB is the pressure at point B and PC the pressure of point C, then, which one of the following
a. PB = CP
b. PB > PC
c. PB = PC
d. PB < PC
PB = PC
82
Which of the following statements is correct?
a. A perfect gas obeys the law pv = RT but no variable specific heat capacities
b. A perfect gas does not obey the law pv = RT
c. A perfect gas obeys the law pv = RT but have variable specific heat capacities
d. A perfect gas obeys the law PV = mRT and has constant specific heat
A perfect gas obeys the law PV = mRT and has constant specific heat
83
In fluid mechanics, flow separation is caused by _______.
a. a positive pressure gradient
b. reduction of pressure to local vapor pressure
c. increase of pressure to local vapor pressure
d. a negative pressure gradient
a positive pressure gradient
84
A cipolette weir means
a. a trapezoidal weir having a slope 4:1
b. a triangular weir of varying dimension
c. a trapezoidal weir having a slope 1:4
d. a rectangular weir of varying dimensions
a trapezoidal weir having a slope 1:4
85
Head loss due to friction for laminar flow through pipe is _______.
a. inversely proportional to average velocity
b. directly proportional to dynamic viscosity
c. inversely proportional to pipe length
d. indirectly proportional to dynamic viscosity
directly proportional to dynamic viscosity
86
Which of the following best describe Stokes theorem?
a. connects a line integral and a volume integral
b. connects gradient of a function and its surface integral
c. connects gradient of a function and its volume integral
d. connects a line integral and a surface integral
connects a line integral and a surface integral
87
Point of the derivatives, which do not exist (and so equals zero) are called _______.
a. maximum point
b. constant point
c. minimum point
d. stationary point
stationary point
88
A frequency curve which is composed of a series of rectangles constructed with the steps as the basis and the frequency as the height.
a. Histogram
b. Clustered column
c. Bar graph
d. frequency distributor
Histogram
89
What is your observation on an iron ball and a cotton ball of same mass release from a height h in air?
a. the cotton ball will reach the ground first
b. the cotton ball will reach the ground first
c. both balls reach the ground at the same time
d. both will not reach the ground
both balls reach the ground at the same time
90
Acceleration due to gravity is ________.
a. increasing with altitude
b. more at the equator of the earth than at poles
c. decreasing with altitude
d. same at all places
decreasing with altitude
91
The principle of conservation of momentum is value for ________.
a. heavy body collisions
b. mix body collisions
c. light body collisions
d. all types of collisions
all types of collisions
92
Four forces P, 2P,3P and 4P act along four sides of a square taken in order. The resultant force is _______.
a. 4P
b. 2 √2P
c. 2P
d. 2P√2
2 √2P
93
Two blocks A and B are resting on a frictionless surface connected by a spring. If they are held apart and the released by speed va and vb, then the sum of their momentums is _______.
a. zero
b. ma x va + mbvb
c. mava + mbvb
d. max va – mbvb
zero
94
If ka and kb are the kinetic energies of two blocks A and B connected by a spring and having mass ma and mb respectively, what is the relationship of mass and kinetic energy of two blocks?
a. ka + kb = 0
b. maka > mbkb
c. maka = mbkb
d. ka - kb = 0
maka = mbkb
95
What is the equivalent work in an isothermal quasi-equilibrium process involving an ideal gas?
a. P1V1 ln(V2/V1)
b. V1 (P2-P1)
c. P2 (V2-V1)
d. mRT V2/V1
P1V1 ln(V2/V1)
96
Which of the following is associated with a technique of solving a system of linear equations?
a. Hermite
b. Sarrus
c. Cartesian
d. Cramer
Cramer
97
It is impossible to construct a continuously operating engine that takes heat from a source and performs an exactly equivalent amount of work.
a. Zeroth Law of Thermodynamics
b. First Law of Thermodynamics
c. Second Law of Thermodynamics
d. Third Law of Thermodynamics
Second Law of Thermodynamics
98
What do you call a triangle having three unequal sides?
a. scalene
b. Isosceles
c. obtuse
d. Oblique
scalene
99
branch of mathematics which uses the properties of numbers by using symbols or letters to represent variables and unknown quantities and numbers in arithmetic operations which usually involves the use and rearranging of equations.
a. Trigonometry
b. Algebra
c. Geometry
d. Mechanics
Algebra
100
In Cartesian plane, what is a term also known as the x-coordinates?
a. Abscissa
b. radius vector
c. Ordinate
d. polar ordinate
Abscissa
