Recent questions without answers

For a completely submerged body with Centre of gravity ‘G’ and Centre of buoyancy ‘B’, the condition of stability will beG is located below BG is located above BG and B a...

In a power plant, water (density = $1000$ $kg$/$m^3$) is pumped from $80$ $kPa$ to $3$ $MPa$. The pump has an isentropic efficiency of $0.85$. Assuming that the temperatu...

Which one of the following is a CFC refrigerant?$R744$$R290$$R502$$R718$

The jobs arrive at a facility, for service, in a random manner. The probability distribution of number of arrivals of jobs in a fixed time interval isNormalPoissonErlangB...

In exponential smoothening method, which one of the following is true?$0 \leq \alpha \leq 1$ and high value of $\alpha$ is used for stable demand$0 \leq \alpha \leq 1$ a...

For machining a rectangular island represented by coordinates $P(0,0), Q(100,0), R(100,50)$ and $S(0,50)$ on a casting using CNC milling machine, an end mill with a diame...

Which one of the following instruments is widely used to check and calibrate geometric features of machine tools during their assembly?Ultrasonic probeCoordinate Measurin...

The major difficulty during welding of aluminum is due to itshigh tendency of oxidationhigh thermal conductivitylow melting pointlow density

The main cutting force acting on a tool during the turning (orthogonal cutting) operation of a metal is $400$ $N$. The turning was performed using $2$ $mm$ depth of cut a...

The process of reheating the martensitic steel to reduce its brittleness without any significant loss in its hardness isnormalisingannealingquenchingtempering

In solid-state welding, the contamination layers between the surfaces to be welded are removed byalcoholplastic deformationwater jetsand blasting

The integral $\oint_{c}^{ } (ydx-xdy)$ is evaluated along the circle $x^2+y^2=\frac{1}{4}$ traversed in counter clockwise direction. The integral is equal to$0$$\frac{-\p...

The exports and imports (in crores of $Rs$.) of a country from $2000$ to $2007$ are given in the following bar chart. If the trade deficit is defined as excess of imports...

You are given three coins: one has heads on both faces, the second has tails on both faces, and the third has a head on one face and a tail on the other. You choose a coi...

Given that the determinant of the matrix $\begin{bmatrix} 1 & 3 & 0\\ 2 & 6 & 4\\ -1 & 0 & 2 \end{bmatrix}$ is $-12$, the determinant of the matrix $\begin{bmatrix} 2 & 6...

$\displaystyle{} \lim_{x\rightarrow 0}\dfrac{x- \sin x}{1- \cos x}$ is$0$$1$$3$not defined

The argument of the complex number $\dfrac{1+\imath }{1-\imath }$ where $\imath =\sqrt{-1}$ ,isA. $-\pi$B. $\dfrac{-\pi }{2}$C. $\dfrac{\pi }{2}$ D. $\pi$

The matrix form of the linear syatem $\dfrac{dx}{dt}=3x-5y$ and $\dfrac{dy}{dt}=4x+8y$ is$\dfrac{d}{dt}\begin{Bmatrix} x\\y \end{Bmatrix}=\begin{bmatrix} 3 & -5\\ 4& 8 \e...

Which one of the following describes the relationship among the three vectors, $\hat{i}+\hat{j}+\hat{k}$ , $2\hat{i}+3\hat{j}+\hat{k}$ and $5\hat{i}+6\hat{j}+4\hat{k}$ ?T...

A circular rod of length $'L'$ and area of cross-section $‘A’$ has a modulus of elasticity $‘E'$ and coefficient of thermal expansion $‘\alpha’$. One end of the rod is fi...

A metallic rod of $500$ $mm$ length and $50$ $mm$ diameter, when subjected to a tensile force of $100$ $kN$ at the ends, experiences a n increase in its length by $0.5$ $...

Critical damping is thelargest amount of damping for which no oscillation occurs in free vibrationsmallest amount of damping for wh ich no oscillation occurs in free vibr...

A circular object of radius $r$ rolls without slipping o n a horizontal level floor with the center having Velocity $V$. The velocity at the point of contact between the ...

For the given statements:Mating spur gear teeth is an example of higher pairA revolute joint is an example of lower pairIndicate the correct answer. Both $I$ and $II$ are...

A rigid link $PQ$ is $2$ $m$ long and oriented at $20^\circ$ to the horizontal as shown in the figure. The magnitude and direction of velocity $V_Q$, and the direction of...

Choose the most appropriate phrase from the options given below to complete the following sentence.The aircraft _________ take off as soon as its flight plan was filed.is...

Read the statements: All women are entrepreneurs. Some women are doctors.Which of the following conclusions can be logically inferred from the above statements?Al...

The statistics of runs scored in a series by four batsmen are provided in the following table. Who is the most consistent batsman of these four?$$\begin{array}{|c|c|c|} ...

For submitting tax returns, all resident males with annual income below $Rs$ $10$ lakh should fill upForm $P$ and all resident females with income below $Rs$ $8$ lakh sho...

A train that is $280$ $meters$ long, traveling at a uniform speed, crosses a platform in $60$ seconds and passes a man standing on the platform in $20$ seconds. What is t...