Engineering Answers

In a crank and slotted lever quick return mechanism, as shown in Fig. 5.37, the driving crank length is 75 mm. The distance between the fixed centres is 200 mm and the length of the slotted lever is 500 mm. Find the ratio of the times taken on the cutting and idle strokes. Determine the effective stroke also. [Ans. 1.67 ; 380 mm] 3.

Two shunt generator operations in parallel problems

1.    You ran and made 2 laps around a 400m track. What were your average speed and average velocity if you ran for 200 seconds? 

1.    A man drops a ball off a cliff. If it is travelling 40m/s just before it hits the ground, how tall is the cliff? (a=9.81m/s^2).

f(x)=sinπx for (0<x<1)

An electron has a rest mass of 9.11×10^(-28) g. What is its mass in kg when moving with a speed of 0.95c_0? Express the answer in 4 significant figures

Differentiate derivative of transforms and transforms of derivatives

Figure below shows a composite shape on a positive x-y coordinate system (solve the question by using the given x-y coordinate system).

Given a=128 mm.

Determine the total area of the composite shape (answer in mm², with single decimal place).

A single cylinder two stroke diesel engine of 125mm bure and 152 mm stroke with Comprenion ratio r = 15 at 1800 rpm. is ronning • arbea, Actos / -Air flow / hour = 245 kg;

Air Inlet tempertun = 300°K; Exhaust pression = 1.0275 bal

Determine (1) The Sav • Scavenging ratio

(ii) The Scavenging efficiency 1111/ Trapping Efficiency.

A three-process cycle of an ideal gas, for which Cp = 1.064 and C₁ = 0.804 kJ/kgm.K, is initiated by an isentropic compression 1-2 from 103.4 kPa, 27°C to 608.1 kPa. A constant volume process 2-3 and a polytropic 3-1 with n = 1.2 complete the cycle. Circulation is a steady rate of 0.905 kgm/s, compute (a)QA, (b) WNET, (c) e, and (d) pm.