CENTRAL INSTITUTE OF PLASTICS ENGINEERING & TECHNOLOGY
Question Bank Solutions
3 MARK --- QUESTION
4/5 MARK ----QUESTION
COURSE: DPMT
SEMESTER: I
SUBJECT: ENGINEERING PHYSICS
1 MARK—QUESTION (MCQ)
-------
1. Identify the pair whose dimensions are equal.
a) Torque and work
b) Stress and energy
c) Force and stress
d) Force and work
Answer: (A) Torque and work
2. The dimensional formula for pressure is
a) MLT-1 b) ML-1T-2 c) ML-1T-2 d) ML-1T-1
Answer: (C) ML-1T-2
3. Out of the following quantities one that is not a vector is
a) Velocity b) Mass c) Acceleration d) Force
Answer: b) Mass
4. Fundamental quantity is a quantity which cannot be expressed in terms of any other physical
quantity. Say True (or) False
Answer: True
5. Velocity is an example of derived quantities. Say True (or) False
Answer: True
6. The relation between linear and angular acceleration is
b) c) d) None of these
Answer: b)
7. Weight is ------------ quantity
a) Scalar b) Vector c) both scalar and vector d) none of these
Answer: b) Vector
8. Mass is a vector quantity. Say true or false
Answer: False
9. SI unit of surface tension is
a) Nm b) N/m2 c) N/m d) None of these
Answer: c) N/m
10. Potential energy is otherwise called as
a) Stored energy b)energy of motion c) both a and b d) none of these
Answer: a) Stored energy
11. The integral of a force with respect to time is defined as
a) Power b) Impulse c) Inductance d)Capacitance
Answer: b) Impulse
12. Stress has the same unit as that of
a) Pressure b) Strain c) Work d)Power
Answer: a) Pressure
13. In Newton’s second law the acceleration is directly proportional to the net--------- and inversely proportional to the --------
a) Force, mass b) Mass, work c) Current, Velocity d) None of these
Answer: a) Force, mass
14. A quantity which has both magnitude and direction
a) Scalar b) Vector c) both A and B d) None of these
Answer: b) Vector
15. CGS system stands for
a) Centre, gram, second b) Centimeter, gravity, second c) Centimeter, gram, second d) None of these
Answer: c) Centimeter, gram, second
16. SI unit of Current is
a) Celsius b) Ampere c) Degree d) Ohms
Answer: b) Ampere
17. There are -----------fundamental quantities
a) 5 b) 6 c)7 d) 8
Answer: c) 7
18. The magnitude of kinetic energy is
a) E=mV2/2 b) E=mV/2 c) E=mc2/2d d) E=mgh
Answer: a) E = mV2/2
19. Supplementary unit of solid angle is
a) Radian b) angle c) degree d) Steradian
Answer: d) Steradian
20. Rocket works under the principle of
a) Law of conservation of momentum b) Law of conservation of energy c) Newton’s third law d)
Boyle’s law
Answer: c) Newton’s Third law
21. -------------- is the physical property of a material that returns to its original shape after the stress
is removed
a) Plasticity b)Opacity c) Elasticity d) None of these
Answer: c) Elasticity
22. The relative amount of deformation is called -----------
Answer: Strain
23. Stress that acts to shorten an object is called
a) Compression stress b) Tension stress c) Shear stress d) Tensile stress
Answer: a) Compression
24. Tensile stress acts to -------------- an object
a) Shorten b) Taller c) Deform d) Lengthen
Answer: d) Lengthen
25. Shear stress acts --------------- to a surface
a) Perpendicular b) Parallel c) within d) None of these
Answer: b) Parallel
26. Stress is measured in terms of the load or the force per ………….
a) Unit length b) Unit time c) Unit area d) Unit mass
Answer: c) Unit area
27. The SI Unit of Stress is-------------
a) Nm2
b) N/m2
c) N/m d) all of these
Answer: b) N/m2
28. The SI Unit of Strain is ------------
a) M b) ms c) unit less d) m3
Answer: c) unit less
29. ------------------------- and ------------------------ strain are the longitudinal strain which shorten and lengthen the object.
a) Compression and tensile b) compression and shear c) any one of these d) None of these
Answer: a) Compression and tensile
30. Strain is defined as the ratio of change in length to the original -----------
a) Time b) Volume c) Mass d)Length
Answer: d) Length
31. In Hooke’s law k is the
a) Plank’s constant b) Gas Constant c) Spring Constant d) All of these
Answer: c) Spring Constant
32. The Dimensional formula for Rigidity Modulus is
a) ML-1T-2 b) M0L0T0
c) ML1T2
d) ML1T-2
Answer: (A) ML-1T-2
33. --------------------is a property of the surface of a liquid that allows it to resist an external force
a) Surface energy b) heat eergy c) Surface Tension d) None of these
Answer: c) Surface Tension
34. The unit of surface tension in CGS system is
a) Dyne/cm b) Nm c) Newton d) meter
Answer: a) Dyne/cm
35. The surface tension and surface energy density of liquid are identical say True of False
Answer: True
36. When the rain drop remains exactly spherical, the angle of contact is ------------degrees
a) 0 b) 180 c) 90 d) 45
Answer: b) 180
37. The attractive force that exists between molecules of same substance----------
a) Adhesive b) Cohesive c) Resistance d) None of these
Answer: b) Cohesive
38. High viscous liquid is -----------
a) Honey b) Water c) Petrol d) Diesel
Answer: a) Honey
39. In stoke’s law the viscous force is directly proportional to -----------
a) Radius of sphere b) Acceleration of sphere c) Force of liquid c) None of these
Answer: a) Radius of sphere
40. If the Reynold’s number is greater than 200, then the flow of liquid is ----
a) Turbulent Flow b) Streamline Flow c) Linear Flow d) None of these
Answer: a) Turbulent Flow
41. A Sponge retains water due to
a) Capillary action b) Surface Tension c) cohesion d) Viscosity
Answer: b) Surface Tension
42. The measure of the hotness or coldness of a body is called …………………….
Answer: Temperature
43. The freezing point of water is marked as 00 C in …………………….. scale
a) Kelvin b) Thermometer c) Fahrenheit d) Centigrade
Answer: d) Centigrade
44. 100 0 C is equal to ………..0F
a) 32 b) 160 c) 180 d) 200
Answer: c) 180
45. The fundamental intervals between the two points in Fahrenheit scale is divide into ………equal
parts
a) 100 b) 30 c) 180 d) None of these
Answer: c) 180
46. 70 0 C is equal to ……………….K
a) 300 b) 30 c) 203 d) 200
Answer: a) 300
47. 1 0 C is equal to ………………….0
F
a) 5/9 b) 9/2 c) 9/5 d) None of these
Answer: c) 9/5
48. SI unit of heat is Joule Say True or False
Answer: True
49. The unit of heat in CGS system …………
a) Calorie b) Joule c) Ampere d) Ohms
Answer: a) Calorie
50. In Newton’s law the rate of loss of heat of body is directly proportional to the ……………..
difference between the body and the surrounding.
a) Pressure b) Volume c) Mass d) Temperature
Answer: d) Temperature
51. The Newton’s law of cooling is applicable when the heat loss is mainly due to………………
a) Convection b) Conduction c) Radiation d) None of these
Answer: a) Convection
52. In Boyle’s law at constant………………………….., the pressure is inversely proportional to
volume
a) Current b) Temperature c) Volume d) Pressure
Answer: b) Temperature
53. Change of pressure in a syringe is an example of …………..
a) Boyle’s law b) Charles law c) Mayer’s law d) None of these
Answer: a) Boyle’s law
54. 980F is equal to ………………….0 C
a) 36 b) 36.67 c) 36.52 d) 36.76
Answer: b) 36.67
55. Charles’ law describes that at constant pressure, the ……………. of a given gas is directly
proportional to the absolute temperature.
a) Volume b) Pressure c) Temperature d) None of these
Answer: a) Volume
56. In water boiling the heat transfer takes place by
a) Conduction b) Convection c) Radiation d) all of these
Answer: b) Convection
57. In isothermal process of a gas………………………..is constant
a) Temperature b) Pressure c) Volume d) None of these
Answer: a) Temperature
58. The unit of specific heat capacity ………….
Answer: J/Kg/K
59. Mayer’s relation is
a) Cp-Cv= R b) Cv-Cp=R c) Cp+Cv = R d) Cv-R=Cp
Answer: a) Cp-Cv = R
60. Relation between pressure and kinetic energy is
a) P= 1/3 K.E b) P=2/3 K.E c) P=1/4 K.E d) K.E =2/3 P.E
Answer: b) P=2/3 K.E
61. Which of the following is the gas energy equation
a) dW= dQ+dE b) dQ=dE-W c) dQ=dE+W d) None of these
Answer c) dQ= dE+W
62. In Cp/Cv= γ when Cp is greater than Cv then γ is lesser than 1. Say True or False
Answer: False
63. Transmission of heat takes place due to
a) Absorption b) reflection c) dispersion d) conduction
Answer: d) conduction
64. In adiabatic process heat is
a) Taken inside b) Given outside c) Transferred d) not transferred from the system to surrounding
Answer: d) Not transferred from the system to surrounding
65. In isobaric process ……………..is kept constant
a) Pressure b) Temperature c) gas d) Volume
Answer: a) Pressure
66. ……………….is the branch of physics which deals with the study of light
a) Elasticity b) Kinetics c) Mechanics d) Optics
Answer: d) Optics
67. Convex and concave mirrors are termed as ………………….mirrors
a) Spherical b) Plane c) Curved d) none of these
Answer: c) curved
68. In Concave mirrors the surface are bulged…………………
Answer: Inward
69. A convex mirror is also called as diverging mirror say true or false
Answer: True
70. A refracting telescope uses two………………… lenses to magnify images in the sky
Answer: Convex
71. Convex mirrors are used in ATM Say True or False
Answer: True
72. The focal length of ……………….lens is positive as it is measured towards the right of the lens
a) Convex b) Concave c) Plane d)None of these
Answer: a) Convex
73. The magnifying power is defined as the ratio of the size of the image to the ………. of
the…………….
a) Object, image b) Image, object c) image , lens d) None of these
Answer: b)) Image, object
74. Critical angle is defined as an angle of incidence at angle of …………………is 900
a) Reflection b) Refraction c) diffraction d) none of these
Answer: b) Refraction
75. Total internal reflection occurs when the light approaches the interface with an angle of
incidence …………….than the critical angle
a) Greater b) Smaller c) Lesser d) equal
Answer: a) Greater
76. The velocity of light is equal to frequency say True or False
Answer: False
77. Magnifying lens in simple microscope is M= ……………….
Answer: 1+D/F
78. Acronym of LASER…………………………………………………….
Answer: Light Amplification by Stimulated Emission of Radiation
79. Monochromatic means………………………….
Answer: Single wavelength
80. High Intensity means highly scattered and dull say True or False
Answer: False
81. Laser emits ……………… in one direction
a)Phonon b) electrons c) Photon d) Neutron
Answer: c) Photon
82. The atoms gets …………………………from ground state to excited state
Answer: Adsorbed
83. Laser works under spontaneous emission of radiation say True or False
Answer: False
84. An emission of radiation where there is no external triggering is called……………………….
a) Spontaneous emission b) Stimulated emission c) Spontaneous adsorption d) None of these
Answer: a) Spontaneous emission
85. In laser action the phonons get multiplied. Say True or False
Answer: False
86. Power is positive for ……………………
a) Convex mirror b) Concave Lens c) Convex lens d) Concave mirror
Answer: c) Convex lens
87. For correcting short sight the lens used is …………………..
Answer: Concave
88. The principle of plane marirror is
a) Refraction b) Diffraction c) Emission d) Reflection
Answer: d) Reflection
89. An example of gas laser is……………….
a) Ruby Laser b) Gas Laser c) Liquid Laser d) Dye Laser
Answer: b) Gas Laser
90. Telescope is a device used to view …………………..
a) Microorganism b) Any distant object c) Far and near object d) Any small object
Answer: b) Any distant object
91. The image of an object formed by convex lens is……………..
a) Inverted and real b) Inverted and imaginary c) real image d) No image
Answer: a)Inverted and real
92. Which of these is mirror formula?
a) 1/u -1/v=1/f b) 1/v-1/u=1/f c) 1/u+1/v= 1/f d) 1/v=1/f+1/u
Answer: c) 1/u+1/v=1/f
93. The distance between two crests or troughs of a wave is called
a) Frequency b) Wavelength c) Velocity d) Periodic time
Answer: b) Wavelength
94. Laser action takes place in
a) Optical resonator b) Pumping source c) Active medium d) None of these
Answer: c) Active medium
95. Power of lens is defined as 1/f, here f stands for…………………
a) Frequency b) Focal length c) Force d) Focal point
Answer: b) Focal length
96. For total internal reflection light should travel from……………………medium
to…………….medium.
a) Denser, heavier b) Rarer, denser c) Denser, rarer d) None of these
Answer: c) Denser, rarer
97. The Principle of propagation of information in optical fibers is reflection. Say True or False
Answer: False
98. In Theory of gases molecules are considered perfectly ………………
a) Elastic b) In elastic c) Plastic d) None of these
Answer: a) Elastic
99. Laser is applied to treat cancer say True or False
Answer: True
100. The spherical shape of a rain drop is due to
a) Density of liquid b) Surface tension c) Atmospheric pressure d) Gravity
Answer: b) Surface tension
101. A liquid will not wet the surface of a solid, if the angle of contact is
a) 0 ⁰ b) 45 ⁰
c) 60 ⁰
d) > 90⁰
Answer: d) > 90⁰
.webp)
Thanks for the messages.