Skema 3764 K1 Trial 2007

2 ENGINEERING TECHNOLOGY PAPER 1 MARKING SCHEME QUESTION NUMBER 1

DESCRIPTIONS

MARKS

A D B E C

1 1 1 1 1 5 2

10

2

10 2 3

(i) (ii) (iii) (iv)

For finishing work For general work/ quick filing For filing soft metals For quick filing of soft workpiece

1 1 1 1 4

2 1 3

4

1 1 1 3

5

A B C

1 1 1 2

6

Boring Taper turning Straight turning Facing

1 1 1 1

4 (accept if step 3) 2 3 (accept if step 4) 5

1 1 1 1

4 7

4 8

Between human and machine Between machines Between machine and human

1 1 1 3

9

D C B

1 1 1 3

3 10

A

1 1 1 1

B C 4 11

Z X Y

1 1 1

1 4 3 2

1 1 1 1

3 12

4 13

√

√ √ a) b) c) d)

14

1 1 1 1

√

4

Direct current generator A) magnetic field B) armature C) commutator

1 1 1 1 4

a) power stroke and exhaust stroke b) ii) gas combust and expand iii) propulsion power is produced

15

1 1 1 3

16

P S R T

1 1 1 1 4

17

P1=P2 F1/A1=F2/A2 20

1

F2 2

 D  =  4D  π   2  2 

2

π

F2=

80 2 2 × 4πD πD

=320 N

1 1 1 4

4 i) ii) iii)

18

TRIAK DIODE SCR

1 1 1 3

19

a) direct line starting circuit b) i) start press button ii) contactor c) becomes electromagnetic to pull the iron core and lever is called holding circuit

1 1 1 1 4 1

20 1 1 3 21

i) ii) iii)

get anod katod

1 1 1 3

1.545 m

1

23

√ √ X

1 1 1

24

limited tender pre-qualified tender open tender

1 1 1

25

P = HEAD PLATE Q = STUDS R = NOGGING

1 1 1

X √ √

1 1 1

A B C

1 1 1

22

1

3

3

3 26

3 27

3 28

X: compressive load Y: tensile load

1 1 2

29

X √ √ X Printed media:

1 1 1 1 4 Either two

30

5 Books, magazines, journals, articles, proceedings

2X1 2X1

Electronic media: Internet, film, diskettes, CD-ROMs, Video, Ebooks, E-learning

4