Saved Bookmarks
This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
State Laws of :(a) Triads (b) Octaves |
|
Answer» (a) Triads : Dobereiner stated that when elements with similar properties are taken three at a time and arranged in the ascending order of their atomic weight, the atomic weights of the middle element is the average of the atomic weight of the first and third elements. (b) Octaves : The law of octaves states that when elements are arranged in the ascending order of their atomic weights, they fall into a pattern in which their properties repeat at regular intervals. Every 8th element starting from a given element resembles in its properties to that of the starting element. |
|
| 2. |
If we keep some iron nails and some steel nails in the layer of earth, what will happen after one month ? |
|
Answer» (1) The iron nails will get rust. (2) The steel nails will not get rust. (3) Because steel is an alloy, it does not rust. |
|
| 3. |
Suggest a test to find the hardness of water and explain the procedure. |
|
Answer» Hardness of water can be tested with the help of a good quality soap. Procedure : (1) Take 50 ml of water from different sources i.e., tap water, well water, lake water, pond water, river water etc. in different test tubes and lable them as A, B, C, D etc. (2) Add 1 gm of good quality soap to each test tube. (3) Close the each test tube with rubber corks. (4) Shake test tube A for 15 seconds and keep it undisturbed for 30 seconds. Measure the height of the foam formed. Note the height of foam in our notebook. (5) Repeat the process for each test tube and record your observation in your notebook. (6) The water which gives less foam is considered as hard water. |
|
| 4. |
Atomic number of an element is 17. (a) What is the position of the element in the periodic table ? (b) How many valence electrons are there in the element ? |
|
Answer» (a) It was placed at 3rd period and 17th group in the periodic table. (b) There are '7' valence electrons in the given element. |
|
| 5. |
The chord `A B`of the parabola `y^2=4a x`cuts the axis of the parabola at `Cdot`If `A-=(a t1 2,2a t_1),B-=(a t2 2,2a t_2)`, and `A C : A B1:3,`then prove that `t_2+2t_1=0`.A. `t_(2)=2t_(1)`B. `t_(2) +2t_(1) =0`C. `t_(1)+2t_(2)=0`D. None of these |
|
Answer» Correct Answer - B `A("at"_(1)^(2), 2"at"_(1)) " and " B("at"_(2)^(2), 2"at"_(2))` are such that `AC : AB 1:3` `:. C((2"at"_(1)^(2)+"at"_(2)^(2))/(3),(4"at"_(1)+2"at"_(2))/(3))` Point C lines on x- axis then `(4"at"_(1)+2"at"_(2))/(3) =0` `rArr t_(2) +2t_(1)=0` |
|
| 6. |
A 1.5 kW (kilo-watt) laser beam of wavelength 6400 Å is used to levitate a thin aluminium disk of same area as the cross section of the beam. The laser light is reflected by the aluminium disk without any absorption. The mass of the foil is close to -A. `10^(-9) kg`B. `10^(-3) kg`C. `10^(-4) kg`D. `10^(-6) kg` |
|
Answer» Correct Answer - D `F = (2P)/(C)` `mg = (2xx 1.5 xx 10^(3))/(3 xx 10^(8))` `m = 10^(-6) kg` |
|
| 7. |
The solution of the DE ` (dy )/(dx) + sqrt ((1 -y ^(2))/( 1- x ^(2))) = 0 ` isA. `"sin"^(-1)x."sin"^(-1)y=C`B. `"sin"^(-1)x=C"sin"^(-1)y`C. `"sin"^(-1)x-"sin"^(-1)y=C`D. `"sin"^(-1)x+"sin"^(-1)y=C` |
|
Answer» Correct Answer - D We have `(dy)/(dx) +sqrt(1-y^(2))/(sqrt(1-x^(2))) = 0` `(dy)/(dx) =-sqrt(1-y^(2))/(1-x^(2))` `int (dy)/(sqrt(1-y^(2)))=-int (dx)/(sqrt(1-x^(2)))` `"sin"^(-1) "("xsqrt(1-y^(2))+ysqrt(1-x^(2))")"=C` `xsqrt(1-y^(2))+ysqrt(1-x^(2))=C` |
|
| 8. |
If coses `0=(x^(2)-Y^(2))/(x^(2)+Y^(2))` is true iff-A. `x= y pm 0`B. `x lty`C. `x gt y`D. none of these |
|
Answer» Correct Answer - D `"cosec"0 ge 1 "here" x^(2)-y^(2) le x^(2) +Y^(2)`(always) `"cosec"0 le -1` solution possible iff `x=0 " "......(i)` `& y=0 " "......(ii)` |
|
| 9. |
The ratio of `11^(th)` term from the beginning and `11^(th)` term the end in the expansion of `(2x-(1)/(x^(2)))^(25) " is " -`A. `x^(15)`B. `-2^(5) x^(15)`C. `2^(15)x^(5)`D. `2^(5)x^(-15)` |
|
Answer» Correct Answer - B `T_(11"staring") =25 C_(10) 2^(15)((1)/(x^(5)))` `T_(11"ending") = T_(16("starting"))` `=-.^(25)C_(15)2^(10)((1)/(x^(20)))` `"then" (T_(11("starting")))/(T_(11("ending")))=-2^(5) x^(15)` |
|
| 10. |
Let the equation of a curve passing through the point (0,1) be given b `y=intx^2e^(x^3)dx`. If the equation of the curve is written in the form `x=f(y)`, then f(y) isA. `sqrt(log_(e)(3y-2))`B. `(log_(e)(3y-2))^(1//3)`C. `(log_(e)(2-3y))^(1//3)`D. None of these |
|
Answer» Correct Answer - B `y=int x^(2)e^(x^(2)) dx x^(3) =t` `x^(2) dx = 1/3 dt` ltbtgt `y=1/3 e^(x^(3)) +c` passes through (0,1) `1=1/3 +c rArr c= 2/3` from (1), we have `y=1/3 e^(x^(3)) +2/3` `rArr e^(x^(3)) =3y -2 rArr x^(3) =e n_(e)(3y-2)` `rArr x = (en_(e)(3y -2))^(1//3)` |
|
| 11. |
The equation `sin^-1x-cos^-1x=cos^-1(sqrt3/2)` hasA. No solutionB. Unique solutionC. Infinite solutionD. None of these |
|
Answer» Correct Answer - B `"sin"^(-1)x-"cos"^(-1) x="cos"^(-1)((sqrt(3))/(2))` `rArr (pi)/(2) -"cos"^(-1)x-"cos"^(-1)x="cos"^(-1)((sqrt(3))/(2))` `rArr (pi)/(2)-(pi)/(6) =2 "cos"^(-1) x` `rArr"cos"^(-1) x=(pi)/(6)` `rArrx=(sqrt(3))/(2)` |
|
| 12. |
If `|z_1 + z_2| = |z_1| + |z_2|` is possible if :A. `z_(2)=1`B. `z_(2)=(1)/(z_(1))`C. `"arg"(z_(1)) ="arg"(z_(2))`D. `|z_(1)|=|z_(2)|` |
|
Answer» Correct Answer - C `|z_(1)+z_(2)|^(2)=(|z_(1)|+|z_(2)|)^(2)` `|z_(1)|^(2)+|z_(2)|^(2)+2|z_(1)||z_(2)|"cos"(0_(1)-0_(2))=|z_(1)|^(2)+|z_(2)|^(2)+2|z_(1)||z_(2)|` `"cos" (0_(1)-0_(2)) =1` `"Arg"(z_(1)) ="Arg"(z_(2))` |
|
| 13. |
A body of mass 5 kg is suspended by a spring balance on an inclined plane as shown in figure. The spring balance measure A. 50NB. 25 NC. 500ND. 10N |
|
Answer» Correct Answer - B |
|
| 14. |
A piece of ics slides down a `45^(@)` incline in twice the time it takes to slide down a frictionless `45^(@)` incline . What is the coefficient of friction between the ice and the incline ? .A. `(3)/(7cot theta)`B. `(4)/(7cot theta)`C. `(3)/(4cot theta)`D. `(7)/(9cot theta)` |
|
Answer» Correct Answer - C |
|
| 15. |
A wooden wedge of mass M and inclination anlgle`(alpha)` rest on a smooth floor. A block of mass m is kept on wedge.A force F is applied on the wedge as shown in the figure such that block remains stationary with respect to wedge So, magnitude of froce F is A. (M+m)g tan `alpha`B. g tan `alpha`C. mg cos `alpha`D. (M+m)g cosec `alpha` |
|
Answer» Correct Answer - A |
|
| 16. |
Constructing Root Locus |
|
Answer» Constructing Root Locus: • Locate the OL poles & zeros in the plot • Find the branches on the real axis • Find angle of asymptotes & centroid • Φ a= ±180º(2q+1) / (n‐m) • σa = (Σ poles – Σ zeroes) / (n‐m) • Find BA and BI points • Find Angle Of departure (AOD) and Angle Of Arrival (AOA) • AOD = 180º‐ (sum of angles of vectors to the complex pole from all other poles) + (Sum of angles of vectors to the complex pole from all zero) • AOA = 180º‐ (sum of angles of vectors to the complex zero from all other zeros) + (sum of angles of vectors to the complex zero from poles) • Find the point of intersection of RL with the imaginary axis. |
|
| 17. |
Driver of a truck gets his steel petrol tank filled with `75 L` of petrol at `10^(@)C`. If a `alpha_("steel")` is `12 xx 10^(-6)//.^(@)C` and `gamma_("pet")` is `9.5 xx 10^(-4)//.^(@)C` the overflow of petrol at `30^(2)C` is -A. `7.31 L`B. `1.37 L`C. `13.7 L`D. `1.73 L` |
|
Answer» Correct Answer - B `gamma_("steel") = 3alpha_("steel")` `=3 xx 12 xx 10^(-6)//.^(@)C` `= 36 xx 10^(-6)//.^(@)C` `gamma_(ob) = gamma_("Pet") - gamma_("steel")` `= 950 xx 10^(-6) -36 xx 10^(-6)` `= 912 xx 10^(-6)//.^(@)C` Overflow petrol `DeltaV = V_(1gammaob) Deltat` `= 75 xx 912 xx 10^(-6) xx 20` `= 1.500 xx 912 xx 10^(-6) = 1.37 L` |
|
| 18. |
A pendulum clock is 5 sec. Slow at a temperature `30^(@)C` and `10` sec. fast at a temperature of `15^(@)C`, At what temperature does it give the correct time-A. `18^(@)C`B. `20^(@)C`C. `25^(@)C`D. None of these |
|
Answer» Correct Answer - C Let correct time at `theta^(@)C` & `15^(@) lt theta lt 30^(@)` apply `Deltat = 1/2 alpha Deltatheta.t` for slow: `5 = 1/2 alpha xx (30^(@) - theta).t "….."(1)` for fast : `10 = 1/2 alpha xx (theta - 15)t "……"(2)` By `(1)(2) : theta = 25^(@)C` |
|
| 19. |
A body cools from `60^(@)C` to `50^(@)C` in 10 minutes when kept in air at `30^(@)C` . In the next 10 minut es its temperature will beA. Below `40^(@)C`B. `40^(@)C`C. Above `40^(@)C`D. Cannot be predicted |
|
Answer» Correct Answer - C `(60-50)/(10) = K [(60 + 50)/(2) - 30] "….."(1)` `(50 - theta)/(10) = K[(50+theta)/(2) - 30] "…."(2)` By `(2)//(1)` `(50-theta)/(10) = (theta - 10)/(50) = theta = 43.3^(@)C` |
|
| 20. |
An ideal heat engine has an efficiency `eta`. The cofficient of performance of the engine when driven backward will beA. `1-(1//eta)`B. `eta//(1-eta)`C. `(1//eta)-1`D. `1//(1-eta)` |
|
Answer» Correct Answer - C `eta =1-(T_(2))/(T_(1))` `omega = (T_(2))/(T_(1) - T_(2))=(T_(2)//T_(1))/(1-(T_(2)//T_(1)))= ((1-eta))/(eta) = 1/eta - 1` |
|
| 21. |
Carbon , silicon and germanium have four valence elcectrons each . These are characterised by valence and conduction bands separated by energy band - gap respectively equal to ` (E_g)_(c) (E_g)_(si) ` and ` (E_g)_(Ge) `. Which of the following statements ture ?A. `(E_(g))_(Si) lt (E_(g))_(Ge) lt E_(g))_(C )`B. `(E_(g))_(C ) lt (E_(g))_(Ge) gt E_(g))_(Si)`C. `(E_(g))_(C ) gt (E_(g))_(Si) gt E_(g))_(Ge )`D. `(E_(g))_(D ) = (E_(g))_(Ge) = E_(g))_(Si)` |
|
Answer» Correct Answer - C (c ) Here, carbon has the highest resistivity and germanium has the lowest resistivity. `:.` Carbon has lowest conductivity and germanium has highest conductivity. So, carbon has highest band gas energy and germanium has lowest band gap energy. |
|
| 22. |
The wire shown in figure carries a current of `32 A`. If `r = 3.14 cm`, the magnetic field at point `P` will be A. `1.6 xx 10^(-4) T`B. `3.2 xx 10^(-4) T`C. `4.8 xx 10^(-4) T`D. `6.4 xx 10^(-4) T` |
|
Answer» Correct Answer - C (c ) Magnetic field due to a complete circular wire loop carrying a currrent `I` at the centre is `(mu_(0) I)/(2 r)`. Here, the straight portions of the wire do not contribute because the point `P` is along them. The field at `P` is due to `(3)/(4)th ` fo the loop of radius `r`. Thus `B = (3)/(4) ((mu_(0) I)/(2 r))` `= (3)/(4) xx (4 pi xx 10^(-7) xx 32)/(2 xx 3.14 xx 10^(-7)) = 4.8 xx 10^(-4) T` |
|
| 23. |
A closed gas cylinder is divided into two parts by a piston held tight. The pressure and volume of gas in two parts respectively are( p, 5v) and (10p ,v). If now the piston is left free and the system undergoes isothermal process , then the volume of the gas in two parts respectively are. |
|
Answer» Since the temperature is constant (isothermal process), we can apply Boyle’s law. The piston will move towards the lower pressure side until the pressures on the two sides are the same. If this common pressure is P’, we have P×5V + 10P×V = P’×6V, since the total volume is 6 V. From this, P’ = (15/6) P. Now, applying Boyle’s law to the gas on the two sides separarely, we have P×5V = (15/6) P×V1 and 10P×V = (15/6) P×V2 where V1 and V2 are the volumes of the gas in the two parts respectively. From the above equations, we obtain V1 = 2V and V2 = 4V. |
|
| 24. |
HOW MANY SIGNIFICANT FIGURES ARE THERE IN \(5*2^4 \) |
|
Answer» 5*16=80 80 has 1 significant digit5 × 2⁴ = 5 × 16 = 80 = 8.0 × 10¹ Since there are 2 significant figures in 8.0 (i.e. 8 and 0), the total number of significant figures is 2. Therefore, number of significant figures in 5 × 2⁴ is '2'. |
|
| 25. |
What is the angle between direction of motion of the coil (say, in generators) and the magnetic field, when induced current is found to be the highest? |
|
Answer» The induced current is found to be highest when the direction of motion of the coil is at right angles to the magnetic field. The induced current is proportional to the time rate of change in magnetic flux. |
|
| 26. |
Who conducts audit to determine energy efficiency in building/home? |
|
Answer» Energy auditor |
|
| 27. |
What is the difference between Verbal and Non- Verbal Communication? |
|
Answer» In Verbal Communication, there is a communication through sounds (talking to each other) and it depends on volume, pronunciation, interpretation, etc. Whereas in Non-Verbal Communication, communication is done through Gestures, body language, signals and written text. |
|
| 28. |
Predict the sign of ‘f’ for convex mirror and concave mirror |
|
Answer» Focal length of concave mirror is always negative because its position is in the left side (front) of the mirror . Focal lenght of convex mirror is always positive because its position is on the right side (behind) the mirror . By cartesian sign convention the distance is measured from the pole i.e. pole is the origin . (i) Distance from pole to left side of the mirror is negative . (ii) Distance from pole to the right of the mirror is positive . 'f’ is positive for convex mirror and negative for concave mirror. |
|
| 29. |
The main focus here is to improve basic sentence composition skills. One can review the types of sentences and the functions of their component parts from.a. Simple sentence b. Compound sentence c. Complex sentence d. All of the above |
|
Answer» Correct answer is a. All of the above |
|
| 30. |
Self-motivation is important because a. It increases individual’s energy and activity. b. It directs an individual towards specific goals. c. It results in initiation and persistence of specific activities. d. All of the Above |
|
Answer» Correct answer is d. All of the Above |
|
| 31. |
Pressure inside two soap bubbles are 1.01 and 1.02 atmosphere, respectively. The ratio of their volumes is (1) 2 : 1 (2) 0.8 : 1 (3) 4 : 1 (4) 8 : 1 |
|
Answer» (4) 8 : 1 P1 = P0 + 4T/r1 P2 = P0 + 4T/r2 r1 / r2 = 2 ⇒ V1 / V2 = 8 : 1 |
|
| 32. |
Let a, b, c ∈R be all non-zero and satisfy a3 + b3 + c3 = 2. If the matrixsatisfies ATA = I, then a value of abc can be :(1) \(\frac{2}{3}\)(2) \(\frac{1}{3}\)(3) 3(4) \(\frac{1}{3}\) |
|
Answer» Answer is (4) \(\frac{1}{3}\) ATA = I ⇒ a2 + b2 + c2 = 1 and ab + bc + ca = 0 Now, (a + b + c) 2 = 1 ⇒a + b + c = ± 1 So, a3 + b3 + c3 – 3abc = (a + b + c)(a2 + b2 + c2 – ab – bc – ca) = ± 1 (1 – 0) = ± 1 ⇒ 3 abc = 2 ± 1 = 3, 1 ⇒ abc = 1,\(\frac{1}{3}\) |
|
| 33. |
Which of the following unacceptable actions of an engineer is clearly a conflict of interest in professional practice?1. Accepting a part time remunerative work from a supplier2. Making public statements that are not based on firm knowledge and conviction3. Permitting for their names to be used in commercial advertisements published by contractors4. Failing to correct or report a situation that may endanger the public. |
|
Answer» Correct Answer - Option 1 : Accepting a part time remunerative work from a supplier The correct answer is Accepting a part time remunerative work from a supplier
|
|
| 34. |
Amount of solar energy received on the earth’s surface per unit area per unit time is defined a solar constant. Dimension of solar constant is (1) ML2T–2 (2) MLT–2 (3) M2L0T–1 (4) ML0T–3 |
|
Answer» (4) ML0T–3 solar constant = E/AT = M1L2T-2 / L2T = M1T–3 |
|
| 35. |
Write the Characteristics of Entrepreneurship. |
|
Answer» 1. Ability to take up risks 2. Believe in hard work and discipline. 3. Financial literacy and money management skills 4. Effective planning and execution.( ½*4=2) |
|
| 36. |
For writing an article in the newspaper which pricing technique will be used by you for making payment? A) Cost plus pricing B) Penetration C) Skimming D) Hour based pricing |
|
Answer» Correct option: D) Hour based pricing |
|
| 37. |
Write the keyboard shortcut for the following : a. Bold – b. Italic - |
|
Answer» a. Bold –Ctrl + B b. Italic -Ctrl + I |
|
| 38. |
What type of risk can one afford to take? |
|
Answer» Simply put, risk tolerance is the level of risk an investor is willing to take. But being able to accurately gauge your appetite for risk can be tricky. Risk can mean opportunity, excitement or a shot at big gains—a "you have to be in it to win it" mindset. But risk is also about tolerating the potential for losses, the ability to withstand market swings and the inability to predict what’s ahead. |
|
| 39. |
Where do buyers look for your product? Which element of marketing mix is related with this statement? A) Product B) Price C) Place D) Promotion |
|
Answer» Correct option: C) Place |
|
| 40. |
To find out the need of the product and the one who can afford it the salesman need to create a —— of prospective customers A) Database B) ProspectC) Capability to pay D) None of these. |
|
Answer» Correct option: A) Database |
|
| 41. |
Why did Anil employ Hari as a cook, although he could not afford to pay him? |
|
Answer» Anil was a kind-hearted man and when Hari showed interest to work for him, Anil could not turn him away as he felt sorry for him. Even though Anil could not afford to pay him he wanted to provide Hari with food and shelter in exchange for Hari cooking for him. |
|
| 42. |
He said he couldn’t _____ to retire from work and live only on his pension. A) accept B) afford C) compensate D) depend E) risk |
|
Answer» Correct option is B) afford |
|
| 43. |
Identify which of the following is a temporary file. a. Project.docx b. Mathsite.tmp c. Both (a) and (b) d. Neither (a) nor (b) |
|
Answer» Correct option: b. Mathsite.tmp |
|
| 44. |
Which out of these is the positive impact of entrepreneurship on society: A) Fosters creativity B) Discouraging welfare of society C) Accentuates problems of society D) Low efficiency |
|
Answer» Correct option: A) Fosters creativity |
|
| 45. |
The various factors causing Ecological Imbalance are______ a. Industrialization b. Urbanization c. Both of the Above |
|
Answer» Both A and B are correct a. Industrialization b. Urbanization |
|
| 46. |
The various factors causing ecological imbalance are _____ . (a) Industrialization. (b) Urbanization. (c) Both of the above. |
|
Answer» Both A and B are correct : (a) Industrialization. (b) Urbanization. |
|
| 47. |
List down any four factors causing ecological imbalance. |
|
Answer» a. Destruction of forests b. Industrialization c. Urbanization d. Large scale use of pesticides e. Overgrazing |
|
| 48. |
___entrepreneurship is the process, where women organize all the factors of production, undertake risks, and provide employment to others. |
|
Answer» Women entrepreneurship is the process, where women organize all the factors of production, undertake risks, and provide employment to others. |
|
| 49. |
__Section is used in long member of chassis. |
|
Answer» Channel section is used in long member of chassis. |
|
| 50. |
State any two risks that are covered under general insurance. |
|
Answer» Some of the risks that are covered under General Insurance are as follows: • Damage to property due to fire, theft etc. • Injury to a person due to Accident. • Legal liabilities arising out of claims made by third parties. • Losses arising dues to credits given by parties |
|