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Knec Surveying I And Workshop Technology I October/November 2014 Question Paper

Knec Surveying I And Workshop Technology I October/November 2014

Course:Diploma In Building Technology

Exam Year:2015

SURVEYING 1 AND TECHNOLOGY 1
October./November.2015
Time:3 hours
THE KENYA NATIONAL EXAMINATIONS COUNCIL
DIPLOMA IN BUILDING TECHNOLOGY
DIPLOMA IN CIVIL ENGINEERING
DIPLOMA IN ARCHITECTURE
SURVEYING AND WORKSHOP TECHNOLOGY I
3 Hours
INSTRUCTIONS TO CANDIDATES
Write your name and index number in the space provided above.
Sign and write the date of examination in the space provided above.
You should have a scientific calculator for this examination.
This paper consists of EIGHT questions in TWO sections: A and B.
Answer FIVE questions choosing TWO questions from section A,TWO questions from section B and ONE from either section in the space provided in this question paper.
All questions carry equal marks.
Maximum marks for each part of a question are as indicated.
Candidates should answer the questions in English.
A image

This paper consists of 16 printed pages.
Candidates should check the question paper to ascertain that all the
Pages are printed as indicated and that no questions are missing.
SECTION A: SURVEYING I
Answer at least TWO questions from this section.
1. (a) In order to find the rail levels of an existing railway,a point A was marked on the rail,
Then points a distances in multiples of 20m from A and the following readings were taken:

Backsight 3.39 on OBM 23.10
Intermediate date sights on A, A + 20 and A + 40, 2.8,2.51 and 2.22 respectively.
A + 60: Change point: foresight 1.88, backsight 2.61.

Intermediate sights on A + 80 and A +100,2.32 and 1.92 respectively; and finally a foresight of 1.54 on A +120, all being in metres. Tabulate and reduce the above readings on the collimation system and apply the suitable arithmetic check.

(12 marks)
(b) Define surveying.
(3 marks)
(c) Explain the following:
i. Topographical surveying;
ii. Cadastral surveying;
iii. Aerial surveying.
(6 marks)

2. (a) Explain the three main sources of error in leveling.
(12 marks)
(b) Reciprocal observation while leveling across a wide river gave the following readings on to stave held vertically at R and S from instruments stationed at P and Q:

Reading of staff at R from P = 1.332 m;
Reading of staff at S from P = 1.016m;
Reading of staff at R from Q =1.614m;
Reading of staff at S and Q =1.278 m.

R and P were close to each other on one bank with S and Q similarly situated on the other bank. If the reduced level of S is 10.376m AOD, what is the level or R?
(8 marks)
3. (a) Explain the following terms:
i. Survey station.
ii. Base line.
(3 marks)
(b) The following staff readings were observed at a road bridge over a railway for the purpose of measuring the clearance between the rails and the grinder on the side at which vertical distance between the girder and the rail.
(17 marks)

Table 1

BS	IS	FS	RL	Remarks
1.22			68.4	BM
0.54		11.45
	7.92			Rail a
	(-5.99)			Girder above a
	8.87			Rail b
	(-5.94)			Girder above b
	7.94			Rail c
	(-5.88)			Girder above c
	8.06			Rail d
	(-5.53)			Girder above d
		0.32
		2.15	68.40	OBM

4. (a) Explain
i. The term temporary adjustment as used in leveling;
ii. The temporary adjustment carried out to a dumpy level before its’ ready for use.
(15 marks)
(b) State any five uses of contours.

(5 marks)
SECTION B: WORKSHOP TECHNOLOGY I
Answer at least TWO questions from this section.
5. (a) Sketch and label the following hand tools;
i. Ball peen hammer;
ii. Rasps file;
iii. Hack saw.
(6 marks)
(b) With the aid of a labeled sketch explain the function of a pipe vice.
(6 marks)
(c) State any TWO advantages of centrifugal pump.
(2 marks)
(d) Explain the working principle of a centrifugal pump.
(6 marks)

6. (a) (i)Define the term machine tool;

(ii) List any TWO types of lathe machines.
(3 marks)
(b) With the aid of a sketch explain the working principle of a lathe machine.
(12 marks)
(c) Explain the term “feed” as applied to lathe operation.
(2 marks)
(d)State the function of a coolant in a lathe machine.
(3 marks)

7. (a) State the functions of the following fuel systems of a vehicle;
i. Carburetor;
ii. Oil filter.
(4 marks)

(b) State:
i. Any FIVE differences between petrol engines and diesel engines.
ii. FOUR functions of piston rings.
(14 marks)
(c) Differentiate between two stroke and four stroke engines.
(2 marks)

8. (a) State any safety measures in workshop.
(4 marks)
(b) Outline any four housekeeping procedures in a workshop.
(8 marks)

(c) State where the following types of fire extinguishers can be used;
i. Water type extinguisher;
ii. Carbon dioxide extinguisher.
(4 marks)

(d) Explain any four emergency procedures carried out during a fire break out in a workshop.
(4 marks)

Knec Surveying I And Workshop Technology I October/November 2014 Question Paper

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