Civil and Environmental Engineering Answers

A field is in the form of a regular pentagon. The direction of the bounding sides was surveyed with an assumed meridian of 5° to the right of the true north. As surveyed with an assumed meridian, the bearing of one side AB is N 33°20’ W.
Compute the true bearing of each side of the pentagon.
Compute the azimuth (from south) of each side of the pentagon.

A hollow circular shaft whose outside diameter is three times its inner diameter transmits 110 hp at 120 rev/
min. If the maximum allowable shearing stress is 50 MPa, find the required outside diameter of the shaft.
Ans. 89 mm

The position of a particle which moves along a straight line is defined by the relation x=t^3-6t^2-15t+40, where x is expressed in feet and t in second.A. determine the time at which the velocity will be zero B.the position and distance traveled by particle at that time C.the acceleration of the particle at that time D.the distance traveled by the particle from t=4s to t=6s.

What will be the require data to determine expansion and contraction of a material in a particular location?

Why the procurement strategy is so important in construction?

A nationwide survey of 20,000 students by the university revealed that almost 78% disapprove of smoking. If 15 of these seniors are selected at random and asked their opinions are selected at random and asked their opinions, what is the probability that more than 11 but less than 14 disapprove of smoking? *

A helicopter is moving horizontally at 90 km.p.h. at a height of 200 m towards a target on the ground,

which is intended to be shelled, Estimate the distance from the target , where the shell must be released in

order to hit the target.

Also find the velocity with which the shell hits the target and the direction of shell at the time of hitting

the target.

A rectangular plate 0f 7 ft by 3.5 ft at an angle 450 with the horizontal, and the 7 ft side is

horizontal. Calculate the magnitude of the force on one side of the plate and the depth of its centre

of its pressure when the top of edge is

(a) at free water surface

(b) 1.75 ft below the water surface.

A bearing with 70 mm shaft in a 70.5 mm sleeve 150 mm long, the uniformed clearance space

is filled with SAE 45 lubricating oil at 350C.

Calculate the rate at which heat is generated at the journal bearing when the bearing shaft

rotates at 250 rpm. Show the answer in kN-m/s, J/s and hp.