Civil and Environmental Engineering Answers

what is the significance and use of specific gravity and absorption

A ball is projected at such an angle that the horizontal range is three times

the maximum height. What is the angle of projection?

A. 27.130 C. 53.130

B. 35.870 D. 67.240

A tank is situated at top of a house. RL of ground was kept as 200 m while the RL of the

terrace was measured to be 206.5 m. The RL of top of tank was found to be 208 m. An orifice

is placed at the bottom of the tank (Cd = 0.65) having diameter of 40 mm. A pipe was fit to

the orifice having diameter of 40 mm and diameter of the pipe was suddenly increased to 100

mm. Bend of 90o was provided and a gate valve is provided to control the flow. Just before

the tap a bend of 90o was again provided and a sudden contraction was provided and pipe

diameter was reduced to 20 mm. Calculate the discharge coming out from the tap if the total

length of pipe is 120 m (10 m 40 mm pipe, 90 m 100 mm pipe and 20 m 20 mm pipe) and

pipe is made up of steel with f = 0.015 if

A man borrows Php100,000 at a rate of 6% compounded continuously for 5 years. How much must he pay annually if money is compounded continuously? 

An electronic device is available that will reduce this year’s labor costs by Php10,000. The equipment is expected to last for eight years. If labor costs increase at an average rate of 7% per year and the interest rate is 12% per year. a. What is the maximum amount that we could justify spending for the device? b. What is the uniform annual equivalent value of labor costs over the eight-year period?

A firm considering the installation of an automatic data processing unit to handle some of its accounting operations. Machines for that purpose may be purchased for Php200,000 or maybe leased for Php80,000 for the first year and Php10,000 less every year now and then until the end of the 4th year. If money is worth 15%, is it advisable to rent or buy the machine? 

The maintenance on a machine is expected to be Php15,500 at the end of the first year and it is expected to increase by Php3,500 each year for the following 7 years. What sum of money should be set aside now to pay the maintenance for the eight year period? Assume 6% interest.

If the body starts from rest at A and slides 200 ft down the 30°

incline, how far will it then move along the other incline? What

will be the velocity when it returns to B? Coeff fr= 0.20.A 100 lb 30° 3 B 200' 4 S

The block slides down an incline. It starts from rest and, after moving 6 ft, strikes a spring (k= 100 lb/in). Determine the maximum deformation of the spring. Coeff fr= 0.20. 600 lb 6' ww 3 4

A tank is situated at top of a house. RL of ground was kept as 200 m while the RL of the

terrace was measured to be 206.5 m. The RL of top of tank was found to be 208 m. An orifice

is placed at the bottom of the tank (Cd = 0.65) having diameter of 40 mm. A pipe was fit to

the orifice having diameter of 40 mm and diameter of the pipe was suddenly increased to 100

mm. Bend of 90o was provided and a gate valve is provided to control the flow. Just before

the tap a bend of 90o was again provided and a sudden contraction was provided and pipe

diameter was reduced to 20 mm. Calculate the discharge coming out from the tap if the total

length of pipe is 120 m (10 m 40 mm pipe, 90 m 100 mm pipe and 20 m 20 mm pipe) and

pipe is made up of steel with f = 0.015 if

a) Tank is full filled

b) Tank is half filled