Engineering Answers

The baggage truck A has a mass of 800 kg and is used to pull each of the 300-kg cars. If the tractive force F on the truck is = 480 N, determine:

a) The initial acceleration of the truck.

b) Forces in coupling B and C.

c) What is the acceleration of the truck if the coupling at C suddenly fails?

The car wheels are free to roll. Neglect the mass of the wheels.

answer asap.

10. In a curved prestressed bridge, how should the guided bearings in piers of the curved region be oriented with respect to the fixed bearing in abutment?

6. Sometimes the side of concrete bridges is observed to turn black in colour. What is the reason for this phenomenon?

The free end ofa cantilever is supported by a 10 mm diametre steel wire. Determine the force in wire and maximum bending moment in the beam when the cantilever is subjected to a uniformly distributed load of intensity 40 kN/m over its entire length (Figure 11.25). Given, flexural rigidity of beam = 1 x 10" Nmm®*, Young's Modulus of the steel wire = 2 « 10° Nimm*.  

Redefine each piecewise function into the Heaviside function and find its Laplace transform.

𝑓(𝑡) ቄ

1, 0 ≤ 𝑡 < 5;

𝑒

−(𝑡−2), 𝑡 ≥ 5.

4. Convert the following azimuths to equivalent bearings.

a. AZIMs of Line CD = 270°00’

b. AZIMn of Line DE = 228°15’

c. AZIMs of Line EF = 135°00’

5. A field is in the form of a regular pentagon. If the true bearing of side AB is N 30°30’E, determine the true azimuth from south of the following sides of the field: AB, BC, and CD. Assume that the corners of the field are labeled in a clockwise direction.

a. Determine the interior Angles.

b. Determine the true bearing and true azimuth of Side AB.

c. Determine the true bearing and true azimuth of Side BC.

d. Determine the true bearing and true azimuth of Side CD.

1. Compute the angles EOF and GOH from the following set of lines whose magnetic bearings

are given:

a. OE, S 15°14’ E and OF, S 36°00’ W

b. OG, N 70°15’ W and OH, S 52°05’ W

2. Compute the angle EPF from the following set of lines whose azimuths are given. AZIMn of Line PE = 219°02’ ; AZIMs of Line PF = 154°16’

3. Convert the following bearings to equivalent azimuths.

a. AB, S 50°10’ E

b. CD, S 45°50’ W

c. EF, N 66°30’ W

When doing a PLC project, there are 5 steps that are typically followed. Please list and describe these steps in your own words.

Using the PLC comparison table compare PLC’s from 2 different manufactures in term of support for IEC- 61131, communication protocols and redundancy. Try to explain what the advantage and disadvantage of the support would mean to you as an end consumer

A 120Vrms 60Hz source supplies four loads connected in parallel as shown

below

Load 1: 150 kVA, at 0.8 pf leading

Load 2: 100 kVA, at unity pf

Load 3: 200 kVA, at 0.6pf lagging

Load 4: 80kW and 95kVAR (inductive)

Find

a) Power Factor

b) Calculate the value of capacitance/inductance connected in parallel

that will raise the power factor to unity