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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 9201. |
A particle starts moving from rest in a from rest in a straight line. Its acceleration vs time `(a - t)` graph is shown in figure. The speed of particle is maximum at. A. `t_(1)`B. `t_(2)`C. `t_(1)`D. `t_(4)` |
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Answer» Correct Answer - D Since acceleration is always `+ve` so, velocity always increases. |
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| 9202. |
Graph shows the acceleration of a `3kg` particles as an applied force moes it from rest along `x` axis. The total work done by the force on the particle by the time the particle reaches `x=6m` , is equal to A. `20J`B. `30J`C. `40 J`D. `60 J` |
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Answer» Correct Answer - D Acceleration as shown in the graph can be converted into force by multiplying with `m=3kg`. Therefore area under the curve `(F-x ` curve`)` is `[(1)/(2)xx2xx12]+[4xx12]=60J` |
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| 9203. |
A body moes in a circular path of radius 5m with a centripetal acceleration of 10 m/s its tangent speed is |
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Answer» Given, ac = 10 m/s2 R = 5m As we know ac (centipetal acceleration) ac = ω2R ω2 = ac/R ω2 = 10/5 ω2 = 2 ω = 1.414 Now tanget speed is v = rω v = 5 x 1.414 v = 7.05 |
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| 9204. |
A body moves in a circular path of radius 5m with a centripetal acceleration of 10 m/s its tangent speed is |
| Answer» Is answer of this question is 5√2m/s | |
| 9205. |
The velocity of a projectile equals its initial velocity added to: Answers a. a constant vertical velocity |
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Answer» Answer: a constantly increasing downward velocity Projectiles may be launched in two ways: i) from the ground, upwards at an angle and ii) from a height, horizontally. When launched from ground, upwards, the vertical velocity first decreases, comes to zero, then increases till it hits the ground. In type ii) projectile, the vertical motion is one of constant downward acceleration.The horizontal component of motion remains constant throughout, in both the cases. The motion referred to in this problem is one of constant increase. therefore, it is a case of type ii) projectile discussed above. Therefore, the velocity of a projectile equals its initial velocity added to a constantly increasing downward velocity. |
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| 9206. |
I was ________ tired that I had to rest. A) so much B) so C) enough D) too |
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Answer» Correct option is B) so B. "So" , i was so tired makes sense.
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| 9207. |
A uniform solid cone of mass m, base radius ‘R’ and height 2R, has a smooth groove along its slant height as shown in figure. The cone is rotating with angular speed `omega`, about the axis of symmetry. If a particle of mass ‘m’ is released from apex of cone, to slide along the groove, then angular speed of cone when particle reaches to the base of cone is A. `(3 omega)/13`B. `(4 omega)/13`C. `(5 omega)/13`D. `( 9 omega)/13` |
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Answer» Initially `I_(1)=3/10 mR^(2) & omega_(1)=omega` Finally `I_(2) =13/10 mR^(2)& omega_(2)=omega_("new")` Using conservation of anular momentum `I_(1)omega_(1)=I_(2)omega_(2)` `omega_(2)=omega_("new")=(3omega)/13` |
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| 9208. |
Conisder a neutral conducting sphere. A poistive point charge is placed outisde the sphere. The net charge on the sphere is thenA. negative and distrubuted uniformly over the surface of the sphereB. negative and appears only at the point on the sphere closest to the point chargeC. negative and distributed non-uniformly over the entire surface of the sphereD. zero |
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Answer» Correct Answer - D Charge will be induced in the conducting sphere, but net charge on it will be zero. |
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| 9209. |
A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in the figure. The electric field inisde the emptied space is A. zero everywhereB. non-zero and uniformC. non-uniformD. zero only at its center |
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Answer» Correct Answer - B Inside the cavity, field at any point is uniform and non-zero. |
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| 9210. |
A circular table with smooth horizontal surface is rotating at an angular speed `omega` about its axis. A groove is made on the surface along a radius and a small particle is gently placed inside the groove at a distance l from the centre. Find the speed of the particle with respect to the table as its distance from the centre becomes L.A. `v=omegal`B. `v=omega(l-a)`C. `v=(omega(l+a))/(2)`D. `v=omegasqrt(l^(2)-a^(2))` |
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Answer» `a=omega^(2)xor(vdv)/(dx)=omega^(2)x` `int_(0)^(v) vdv =int_(a)^(t)omega^(2)xdx` `v=omegasqrt(l^(2)-a^(2))` |
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| 9211. |
‘The air we breathe is made up of lots of other things besides oxygen’. Identify the broad composition of dry air.Or ‘Clouds are an important part of Earth's weather’. Explain the statement. |
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Answer» Air is a mechanical mixture of a variety of gases. The main constituents of this mixture are nitrogen and oxygen, accounting for almost 99% of the whole, with roughly three parts of nitrogen to one part of oxygen. There are small amounts or traces of other gases. The percentage of composition of dry air by volume is in the proportions as under: - Nitrogen - 78.09 % Oxygen - 20.95 % Argon - 0.93 % Carbon dioxide - 0.03 % OR The clouds may be defined as a visible aggregate of minute particles of water in the free air. Ice or clouds both are formed by the cooling of masses of damp air, generated by upward motion and its accompanying expansion with a fall of pressure. |
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| 9212. |
At `t = 0`, the positions and velocities of two particles are as shown in the figure. They are kept on a smooth surface and being mutually attracted by gravitational force. Find the position of centre of mass at `t = 2s`. .A. `X=5m`B. `X=7m`C. `X=3m`D. `X=2m` |
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Answer» Correct Answer - B As no external force is acting on the system. The velocity of centre of the mass will be constant. `v_(CM)=(1x5-1xx3)/(1+1)=1m//s` Displacement of the centre of mass `/_x_(CM)=1xx2=2m` Hence, position of the centre of mass `=5+2=7m` |
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| 9213. |
Explain the term atmosphere. List the layers of the atmosphere. |
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Answer» The invisible and odorless gas which we breathe, which sustains life and produces an infinite variety of phenomena is what we call air. The envelope of air surrounding the earth and extending to great heights is the atmosphere where vast physical processes occur, giving rise to the ever-changing weather phenomena. Different layers of atmosphere are: (a) Troposphere (b) Stratosphere (c) Mesosphere (d) Thermosphere |
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| 9214. |
In the figure, what is the magnetic field at the point `O`? A. `(mu_(0)l)/(4pir)`B. `(mu_(0)l)/(4r)+(mu_(0)l)/(2pir)`C. `(mu_(0)l)/(4r)+(mu_(0)l)/(4pir)`D. `(mu_(0)l)/(4r)-(mu_(0)l)/(4pir)` |
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Answer» Correct Answer - c Magnetic field due to stright wire above O is zero i.e `B_(1)=0(since,theta=0^(@))` The magnetic field due to semi circular part `B_(2)=(mu_(0)nI)/(2r)=(mu_(0)(1//2)I)/(2r)=(mu_(0)I)/(4r)` The magnetic field due to lower straight portion `B_(3)=(1)/(2)(mu_(0)I)/(2pir)(upward)` Net magnetic field `B=B_(1)+B_(2)+B_(3)` `=0+(mu_(0)I)/(4r)+(mu_(0)I)/(4pir)(upwards)` |
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| 9215. |
Explain two types of cover. Distinguish each type briefly.Or(a) Briefly summarize the concept of section.(b) List any three field signals that can be used at night. |
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Answer» There are two types of cover. They are:- (a) Cover from view. (b) Cover from fire. Cover from View - A person is concealed only from view and not from fire. Example - A person behind a bush or moving in tall grass. Cover from Fire - This means that the concealed person is protected both from view and fire of weapon. Example – A person moving in a nullah or on the other side of a high ground. OR (a) A Section is the smallest sub unit of an Infantry Battalion and is capable of undertaking independent task. It consists of ten persons who are organized in Rifle group and Support Group. (b) Some of the field signals that can be used at night are:- (i) Pre decided signals on a walkie talkie. (ii) Clicks by fingers or by tounge. (iii) Whistle by the mouth. (iv) Use of colour light. (v) Use of blacked out torch. (vi) Firing of weapon. |
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| 9216. |
Distance can be over-estimated or under-estimatedIdentify three situations each for the following:(a) When distance is over-estimated.(b) When distance is under-estimated. |
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Answer» (a) Distance is overestimated when:- (i) Light is bad. (ii) The sun is shining in the observer’s eye. (iii) The object is small in relation to its surroundings. (iv) Looking through a valley of narrow lane e.g. Street. (v) Lying down. (b) Distance is underestimated when:- (i) The light is bright or the sun is shining from behind the observer. (ii) The object is large in relation to its surrounding. (iii) There is some dead ground between observer and the object. (iv) Looking uphill. |
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| 9217. |
A certain charge Q is divided into two parts q and `Q-q`, wheich are then separated by a cetain distance. What must q be in terms of Q to maximum the electrostatic repulsion between the two charges?A. Q=2qB. Q=3qC. Q=4qD. Q=4q+c |
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Answer» Correct Answer - a The electrostacitc force of repulsion between the charge and (Q-q) at separation r is given by `F=(1)/(4piepsilon_(0))(qQ-q)/(r^(2))=(1)/(4piepsilon_(0)).(Q-2q)/(r^(2))=0` as `(1)/(4piepsilon_(0)r^(2)) is constant, therefore,Q -2q=0 or Q=2q` |
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| 9218. |
The plane face of a plano convex lens is silvered.If `mu`be the refrative index and R, the radius of curvature of curved suraface, then system will behave like a concave mirror of curvatureA. `muR`B. `R^(2)//mu`C. `R//(mu-1)`D. `(mu+1)//(mu-1)R` |
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Answer» Correct Answer - c when an object is placed in fron of such a lens the rays frst of all refracted from the convex surface, then refract from the polished plane surface and again refracts from conved surface.If `F_(1) and F_(m)` be the focal lengths of lens (conved surface) and mirror (plane poplished surface) respectively then effective focal length f is given by `(1)/(f)=(1)/(F_(1))+(1)/(f_(m))+(1)/(F_(1))=(2)/(F_(m))=(2)/(f_(1)) (therefore F_(m))=R/2=oo)` `(1)/(f_(1))=(mu-1)((1)/(R))` `therefore (1)/(f)=(2(mu-1))/(r)or F=(R)/(2(mu-1))orR=2F=(R)(mu-1)` |
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| 9219. |
Which of the following is not Kolkata-Hoogly industrial region?(A) Haldia (B) Jamshedpur(C) Titagarh (D) Naihati |
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Answer» Jamshedpur is not Kolkata-Hoogly industrial region. |
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| 9220. |
A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. When coming out on the opposite parallel face, the red and green ray emerge formA. two points propagating in two different non-parallel directionsB. two points propagating in two different parallel directionsC. one point propagating in two different directionsD. one point propagating in the same direction. |
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Answer» Correct Answer - b We kknow that in any medium except vacuum or air the velocities of different colours are different.Therefore, both red and green colours are refracted at different angles of refraction so, after emerging from glass slab through opposite paralle faces, they apperar at two different points and move in two diffeent parallel direction. |
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| 9221. |
Who is the author of the book "A better India: A Better World"?1. Kiran Bedi2. NR Narayana Murthy3. Sudha Maurthy4. Shashi Tharoor |
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Answer» Correct Answer - Option 2 : NR Narayana Murthy The correct answer is NR Narayana Murthy.
Some famous books and their authors:
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| 9222. |
Which among the following cannot be a foundation type?(a) Mud concrete with brick aggregate or kankar(b) Weak cement concrete of 1:8:16 with brick ballast(c) Rammed kankar or rammed brick ballast well compacted adding water, during ramming(d) Aggregates and Portland cement |
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Answer» Correct option is (d) Aggregates and Portland cement To explain: A foundation (or, more commonly, base) is the element of an architectural structure which connects it to the ground, and transfers loads from the structure to the ground. Foundations are generally considered either shallow or deep.[1] Foundation engineering is the application of soil mechanics and rock mechanics (Geotechnical engineering) in the design of foundation elements of structures. |
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| 9223. |
_____________ curves are curves which, when viewed from the side, are concave upwards. This includes vertical curves at valley bottoms, but it also includes locations where an uphill grade becomes steeper, or a downhill grade becomes less steep.(a) Sag horizontal(b) Hog horizontal(c) Sag vertical(d) Hog vertical |
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Answer» Right answer is (c) Sag vertical Explanation: The most important design criterion for these curves is headlight sight distance. When a driver is driving on a sag curve at night, the sight distance is limited by the higher grade in front of the vehicle. This distance must be long enough that the driver can see any obstruction on the road and stop the vehicle within the headlight sight distance. The headlight sight distance (S) is determined by the angle of the headlight and angle of the tangent slope at the end of the curve. |
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| 9224. |
______________ is the most high risk activity in the construction sector.(a) Shuttering(b) Demolition(c) Pointing(d) Plastering |
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Answer» Right choice is (b) Demolition Explanation: The essence of safe demolition lies in efficient risk control, environmental management and careful planning. The CDM Regulations have provided a platform from which the industry exhibits best practice, demanding written plans of work for demolition even where a project is not notifiable. |
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| 9225. |
A collection of points in a plane which are at a constant distance from a fixed point is called a _______.1. Ellipse2. Circle3. Parabola4. Hyperbola |
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Answer» Correct Answer - Option 2 : Circle The correct answer is Circle.
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| 9226. |
The distance shown by red line represents ______________(a) separation(b) parallel way(c) height(d) gauge |
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Answer» Right option is (d) gauge To elaborate: During the early days of rail, there was considerable variation in the gauge used by different systems. Today, 54.8% of the world’s railways use a gauge of 1,435 mm (4 ft 8 (frac{1}{2}) in), known as standard or international gauge. Gauges wider than standard gauge are called broad gauge; narrower, narrow gauge. Some stretches of track are dual gauge, with three (or sometimes four) parallel rails in place of the usual two, to allow trains of two different gauges to use the same track. |
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| 9227. |
90% of urban water supply and sanitation services are currently in the ______________(a) industry(b) agriculture(c) government(d) public sector |
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Answer» Right choice is (d) public sector To elaborate: They are owned by the state or local authorities, or also by collectives or cooperatives. They run without an aim for profit but are based on the ethos of providing a common good considered to be of public interest. In most middle and low-income countries, these publicly owned and managed water providers can be inefficient as a result of political interference, leading to over-staffing and low labour productivity. |
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| 9228. |
Percussion instruments are ______.1. Tabla, Dholak, & Drums 2. Sitar, veena ,violin 3. Cymbals, ghatam, not4. Jaltarang, ektara, kartal |
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Answer» Correct Answer - Option 1 : Tabla, Dholak, & Drums The correct answer is Tabla, Dholak, & Drums.
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| 9229. |
Symbol shown below represents ______________ type of road signal.(a) disabled people(b) crossing area(c) men at work(d) garbage area |
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Answer» The correct option is (c) men at work To explain: Men At Work Sign is MUTCD compliant for safety protocol and compliance on roadways and in parking lots. A Men At Work Sign is a useful device to help display official regulations and provide mandatory information to drivers and pedestrians on both public and private roadways and parking areas. |
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| 9230. |
The diameter of longitudinal bars of a column should never be less than _________(a) 6 mm(b) 8 mm(c) 10 mm(d) 12 mm |
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Answer» Right choice is (d) 12 mm To explain: Due to buckling we don’t use diameter of longitudinal bars of a column less than 12 mm diameter. |
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| 9231. |
Figure shown below represents ____________(a) flat roof(b) clerestory roof(c) shed roof(d) gable roof |
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Answer» The correct answer is (c) shed roof For explanation: A mono-pitched roof, often referred to as a pent roof, shed roof, lean-to roof, and/or skillion roof, is a single-sloped roof surface, often not attached to another roof surface. This is in contrast to a dual-pitched roof, also known as a gabled roof, which is pitched in two different directions. |
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| 9232. |
Figure shown below represents a symbol ‘A’, it signifies?(a) Septic tank(b) Soak pit(c) Gutter(d) Water storing tank |
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Answer» The correct option is (a) Septic tank Easiest explanation: A septic tank collects and treats wastewater at a property that is not connected to the mains sewer system. Installed underground, a septic tank makes use of natural processes to treat the sewage it stores. Usually made up of two chambers or compartments, the tank receives wastewater from an inlet pipe. Wastewater enters the first chamber and separates over time, with solids settling at the bottom, oils and greases forming a layer of scum at the top, and a layer of relatively clear water remaining in the middle. |
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| 9233. |
Percussion drilling is unsuitable in _______(a) unconsolidated sand(b) unconsolidated gravel(c) consolidated rocks(d) quick sand |
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Answer» Correct answer is (d) quick sand Easy explanation: Percussion drilling is a manual drilling technique in which a heavy cutting or hammering bit attached to a rope or cable is lowered in the open hole or inside a temporary casing. The technique is often also referred to as ‘Cable tool’. Usually a tripod is used to support the tools. |
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| 9234. |
In this method, it is assumed that the property will lose its value by a constant percentage of its value at the beginning of every year. This method is called?(a) Sinking fund method(b) Constant percentage method(c) Straight line method(d) Quantity survey method |
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Answer» The correct choice is (c) Straight line method The best I can explain: In this method a fixed amount of the original cost is deducted every year so that at the end of the utility period only the scrap value is left. Annual depreciation D = Original cost-scrap value/life in year = C-S/n, Where C- original cost, S- scrap value, n-life of the property in years and D- annual depreciation. The book value after the number of years, say N years = original cost – N*D. |
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| 9235. |
What is the longitudinal slope called?(a) Kerb(b) Horizon(c) Grade(d) Lift |
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Answer» Right option is (c) Grade To explain I would say: The grade (also called slope, incline, gradient, mainfall, pitch or rise) of a physical feature, landform or constructed line refers to the tangent of the angle of that surface to the horizontal. It is a special case of the slope, where zero indicates horizontality. A larger number indicates higher or steeper degree of “tilt”. Often slope is calculated as a ratio of “rise” to “run”, or as a fraction (“rise over run”) in which run is the horizontal distance and rise is the vertical distance. |
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| 9236. |
In the following figure, Part 2 represents?(a) cut-out(b) generator(c) jet pump with pressure switch(d) power source |
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Answer» The correct choice is (c) jet pump with pressure switch The explanation is: A pump-jet, hydrojet, or water jet is a marine system that creates a jet of water for propulsion. The mechanical arrangement may be a ducted propeller (axial-flow pump), a centrifugal pump, or a mixed flow pump which is a combination of both centrifugal and axial designs. The design also incorporates an intake to provide water to the pump and a nozzle to direct the flow of water out of the pump. |
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| 9237. |
An _________ culvert is normally a low profile culvert. It allows them to be installed without disturbing the causeway as it will span over the entire drainage width.(a) box(b) rectangle(c) arch(d) circular |
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Answer» The correct choice is (c) arch For explanation: They are normally made of metal, stone masonry or RCC. They are installed easily, and you don’t need to use expensive water diversion structures to install it. Common shapes include semicircular arch, elliptical arch, and concrete box culverts. Another benefit of these type of structure is that the installation process will not take a lot of time, compared to traditional box culverts. |
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| 9238. |
A road junction where typically three or more roads are joined by a circular section of road is called _________(a) intersection(b) merging(c) circulation(d) roundabout |
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Answer» The correct answer is (d) roundabout The best I can explain: A roundabout, also called a traffic circle, road circle, rotary, rotunda or island, is a type of circular intersection or junction in which road traffic flows almost continuously in one direction around a central island. So-called “modern” roundabouts require entering traffic to give way to traffic already in the circle and optimally observe various design rules to increase safety. |
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| 9239. |
As the unevenness index increases there is no substantial increase in _____________(a) fuel consumption(b) wear and rear of tyres(c) vehicle maintenance cost(d) increase of speed |
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Answer» Correct choice is (d) increase of speed For explanation I would say: As there is an increase in the unevenness index, there is no substantial increase in speed, instead it decreases. Unevenness index is a measure of unevenness which is the cumulative measure of vertical undulations of the pavement surface recorded per unit horizontal length of the road. An unevenness index value less than 1500 mm/km is considered as good, a value less than 2500 mm.km is satisfactory up to speed of 100 kmph and values greater than 3200 mm/km is considered as uncomfortable even for 55 kmph. |
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| 9240. |
The weight of vehicles affects ____________(a) pavement thickness(b) ruling gradient(c) limiting gradient(d) pavement thickness, ruling gradient and limiting gradient |
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Answer» Correct answer is (d) pavement thickness, ruling gradient and limiting gradient For explanation I would say: Weight transfer and load transfer are two expressions used somewhat confusingly to describe two distinct effects: the change in load borne by different wheels of even perfectly rigid vehicles during acceleration, and the change in center of mass (CoM) location relative to the wheels because of suspension compliance or cargo shifting or sloshing. In the automobile industry, weight transfer customarily refers to the change in load borne by different wheels during acceleration. This is more properly referred to as load transfer, and that is the expression used in the motorcycle industry. |
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| 9241. |
Which one is not a type of Equalization tanks?(a) Flow through type(b) Intermittent flow type(c) Variable inflow/constant discharge type(d) Intercept type |
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Answer» Right choice is (d) Intercept type Best explanation: The simple flow through type equalization tank is mainly useful in assisting self neutralization or evening out of fluctuating concentrations, not for balancing of flows since a flow through type tank once filled, gives output equal to input. Flow balancing and self-neutralization are both achieved by using two tanks, intermittently one after another. One tank is allowed to fill up after which it is checked for pH (or any other parameter) and then allowed to empty out. The second tank goes through a similar routine. Intermittent flow type tanks are economic for small flows from industries. When flows are large an equalization tank of such a size may have to be provided that inflow can be variable while outflow is at a constant rate, generally by a pump.The capacity required is determined from a plot of the cumulative inflow and a plot of the constant rate outflow and measuring the gaps between the two plots. A factor of safety may be applied if desired. |
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| 9242. |
The area of a sloping surface of a protective embankment of mean height d, side slopes S: 1 and length L is _________(a) d x d x s(b) (d2 x (ds)2)1/2(c) L.D (1 + s2)1/2(d) 2 L.D (1 + s2)1/2 |
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Answer» Correct option is (c) L.D (1 + s2)1/2 Explanation: An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil, sand, clay, or rock. It has a semi-pervious waterproof natural covering for its surface and a dense, impervious core. This makes such a dam impervious to surface or seepage erosion. Such a dam is composed of fragmented independent material particles. The friction and interaction of particles binds the particles together into a stable mass rather than by the use of a cementing substance. |
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| 9243. |
The head of public works department of any Indian state, is ____________(a) Transport Minister(b) Chief Engineer(c) Superintending Engineer(d) Executive Engineer |
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Answer» Right answer is (b) Chief Engineer Explanation: A chief engineer is a senior engineer in an organization. Typically they are in charge of an engineering department, and duties vary considerably depending on the industry. In public works, such as for a city, county, military division, or federal program, the engineering department often has a chief engineer. This is typically shown as “Office of the Chief Engineer” in organizational charts. This person or group is separate from the other engineering offices, and functions to coordinate their activities from an engineering perspective. |
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| 9244. |
_____________ is used as a protective and decorative covering for interior or exterior walls and surfaces.(a) Plaster(b) Stone veneer(c) Paint(d) Putty |
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Answer» Correct answer is (b) Stone veneer To explain I would say: Stone veneer can be made from natural stone as well as manufactured stone. Natural stone veneer is made from real stone that is either collected, i.e. fieldstone, or quarried. The stone is cut to a consistent thickness and weight for use as a veneer. |
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| 9245. |
Traffic lights are red, yellow and ___. |
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Answer» Correct answer is green |
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| 9246. |
It was after dark when the two children were both ________ on the safety-crossing by a lorry. A) knocked down B) knocked out C) run across D) run out E) run in |
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Answer» Correct option is A) knocked down |
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| 9247. |
Find the words which are out of the logic list:A) niece B) sister C) sister in law D) brother |
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Answer» Correct option is D) brother |
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| 9248. |
Will you _______ my essay, please, to find out whether I made any mistakes? A) see through B) look through C) look up D) look into E) see to |
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Answer» Correct option is B) look through |
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| 9249. |
The rising _____ of living is as hard on country families as on city families. A) amount B) cost C) expense D) increase E) price |
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Answer» Correct option is B) cost |
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| 9250. |
Find the words which are out of the logic list:A) rain B) star C) cloud D) thunder |
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Answer» Correct option is B) star |
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