Engineering Answers

1. SLOPE TAPING. A measurement is made along a line that is inclined by a vertical angle of

15°25’ as measured using a hand level and clinometer. The slope measurement is 756.52m. What

is the corresponding horizontal distance?

2. CORRECTION OF TAPE LENGTH. The correct distance between points E and F is 213.50m. If a 100m tape that is 0.025m too long is used to measure EF, what will be the measured distance?

3. CORRECTION OF TAPE LENGTH. The sides of a square lot having an area of 2.25 hectares

were measured using 100m tape that was 0.04m too short. Compute the error in the area.

A cafeteria can seat a maximum of 50 persons. Customers arrive in a Poisson stream at the rate of 10

per hour and are served (one at a time) at the rate of 12 per hour.

(a) What is the probability that an arriving customer will not eat in the cafeteria because it is full?

(b) Suppose that 3 customers (with random arrival times) would like to be seated together. What is

the probability that their wish can be fulfilled? (Assume that arrangements can be made to seat

them together as long as 3 seats are available).

calculate the quantity of air supplied per kg of fuel burnt in the combustion chamber of the boiler when the required draught of 1.85 cm of water is produced by a chimney of 32 m height. The temperature of the flue gases and ambient air recorder are 370°C and 30°C respectively.

What is the basic advantage of using interrupt-initiated data transfer over transfer under

program control without an interrupt?

Why are the read and write control lines in a DMA controller bidirectional? Under what

condition and for what purpose are they used as inputs? Under what condition and for what

purpose are they used as outputs?

What is the difference between isolated I/O and memory-mapped I/O? What are the

advantages and disadvantages of each?

Explain various addressing modes available in computer organization with neat example.

Convert the following arithmetic expressions from infix to reverse Polish notation.

a. A * B + C * D + E * F

b . A * B + A * (B * D + C * E)

c. A + B * [C * D + E * (F + G)]

d. A * [B + C * (D + E)] / f * (G + H)

If the force is given by F=2x-y+z)i+ x+y-z^2)j +3x-2y+4z)k find the work done by a moving particle around a closed path C in the xy plane. If the circle has centre at the origin and radius 3 . Is this work done path independent??

Convert the following arithmetic expressions from infix to reverse Polish notation.

a. A * B + C * D + E * F

b . A * B + A * (B * D + C * E)

c. A + B * [C * D + E * (F + G)]

d. A * [B + C * (D + E)] / f * (G + H)