Being Curious: Q & A Forum

Across the HV side of a single phase 200 V / 400 V, 50 Hz transformer, an
impedance of 32 + j24Ω is connected, with LV side supplied with rated voltage &
frequency. The supply current and the impedance seen by the supply are
respectively

A large strong tank contain oil having a density of 917 kg/m³. The tank is 3.66 m tall and is vented (open) to the atmosphere of 1atm abs at the top. The tank is filled with oil to a depth of 3.05m and also contains 0.61m of water in the bottom of the tank. Calculate the pressure in Pa and psi a 3.05m from the top of the tank and at the bottom. Also calculate the gage pressure at the tank bottom.

What is the probability of getting a sum as 3 if a dice is thrown?

An infinite slab 300mm thick heated from one side. The temperature distribution inside the slab is given by T = 120−100x+24x 2 +40x 3 −30x 4 Where, T is in °C and x is in meters. Considering an area of 3m2 , calculate : (i) The heat entering and leaving the slab in unit time (ii) The heat energy stored in unit time (iii) The rate of temperature change at the both sides of the slab (iv) The point where the rate of cooling or heating is maximum The properties for concrete are k = 1.20W/mK, α = 1.77×10−3m2 /h.

The temperature distribution across a large concrete slab 500mm thick heated from one side as measured by thermocouples approximates to the following relation :

T= 120 - 100x + 24x²+ 40x³— 30 x⁴ (Where T is in °C and x is in meters)

Considering an area of 4m², thermal diffusivity 1.77x10^-3 m²/h, the max rate of change of temperature in the slab is

The forces in members a,b,c in the Truss shown are 

6 boys and 6 girls go to an exhibition and the cost of a ticket is Rs 10. Each girl has a ten rupee note while each boy has twenty rupee note they stand in a queve at the counter and the cashier does not have any money in the beginning , then the number of ways of arranging the boys and girls ,so that no one waits for a change is

A bar chart of four activities indicating their scheduled start and finish " end-of-day" values and the resource requirement per day are given below. What will be the maximum and the minimum resource - need on any of the days?

The rates of rainfall for successive 30 minutes period of a 3-hour storm are : 1.6, 3.6. 5.0, 2.8, 2.2 and 1cm/hr. The corresponding surface runoff  is estimated to be 3.6 cm. The \(\phi\) - index and w - index are respectively :

Consider the following statements :

1.Mathematically speaking,the time taken for 100% consolidation is infinite.

2.The time factor for a particular average degree of consolidtion depends upon the distribution of initial excess hydrostatic pressure.

3.Secondary consolidation obeys Terzaghi's one-dimensional theory of consolidation.

Which of these statements are correct ?