12

BAHAGIAN B

[ 40 markah ]

Jawab semua soalan di kertas jawapan yang disediakan.

21. Rajah 9 di bawah menunjukkan contoh enjin 4 Lejang secara

ringkas (grafik).

Rajah 9

a) Nyatakan dengan jelas proses Lejang Masukan.

[ 8 markah

]

b) Apakah istilah TTA dan TTB

[ 2 markah

]

KHB KEMAHIRAN HIDUP TEKNIKAL (76)

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Jawapan:

1 a) Lejang Masukan adalah lejang pertama dalam edaran enjin 4

lejang. ......................................................................................................

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1 b.

TTA : .........................................................................................................

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KHB KEMAHIRAN HIDUP TEKNIKAL (76)

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TTB

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22. Cara mengira penggunaan tenaga elektrik tempat kediaman

mengikut kilowatt jam ( kwj )

Kadar Tarif

Bagi 200 unit

pertama

RM 0.218 seunit

Bagi 200 unit

kedua

RM 0.289 seunit

Bagi 200 unit

ketiga

RM 0.312 seunit

Bagi baki unit

seterusnya

RM 0.510 seunit

a) Pada bulan ini, Encik Ahmad telah menggunakan elektrik

sebanyak 180 unit. Berapakah jumlah bayaran yang perlu

dijelaskan oleh Encik Ahmad ?

[ 2 markah ]

KHB KEMAHIRAN HIDUP TEKNIKAL (76)

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b) Puan Batrisya dan keluarganya seramai 8 orang tinggal di

sebuah banglo berhampiran bandar. Mereka menggunakan

tenaga elektrik secara berhemah. Bacaan meter kwj pada bulan

lepas ialah 07654. Pada bulan ini bacaan meter kwj meningkat

kepada 08176. Berapakah jumlah bayaran yang perlu dibayar

oleh Puan Batrisya ?

[ 4 markah ]

c) Bacaan meter kwj rumah kediaman seorang jutawan pada bulan

Jun ialah sebanyak 05911. Manakala bacaan meter kwj pada

bulan sebelumnya ialah 04588. Berapakah bayaran elektrik yang

beliau kena bayar ?

[ 4 markah ]

Jawapan :

2a. ............................................................................................................

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KHB KEMAHIRAN HIDUP TEKNIKAL (76)

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2b. ............................................................................................................

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23. Rajah 10 menunjukkan sebuah buzer berserta simbolnya.

KHB KEMAHIRAN HIDUP TEKNIKAL (76)

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RAJAH 10

Buzer adalah peralatan penggera yang menukar gelombang elektrik

kepada gelombang bunyi. Buzer banyak digunakan dalam litar

elektronik.

Berdasarkan pernyataan diatas,

a) Nyatakan dua perbezaan antara buzer elektromagnet dengan

buzer piezo.

[ 4

markah ]

b) Huraikan tiga perbezaan diantara komponen aktif dengan

komponen pasif.

[ 6

markah ]

KHB KEMAHIRAN HIDUP TEKNIKAL (76)

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Jawapan :

2a. Dua perbezaan buzer elektromagnet dan buzer dan buzer piezo.

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2b. Huraikan tiga perbezaan komponen aktif dan komponen pasif.

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KHB KEMAHIRAN HIDUP TEKNIKAL (76)

Rajah 11 (a) Rajah 11 (b)

19

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24. Rajah 11 (a) dan Rajah 4 (b) menunjukkan kaedah untuk

memaku pada bahan kerja.

Berdasarkan Rajah 11(a) dan Rajah 11(b),

a) (i) Pilih dan tentukan kaedah yang dapat menghasilkan cengkaman

yang kuat dan

kukuh.

[ 1

markah ]

KHB KEMAHIRAN HIDUP TEKNIKAL (76)

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b) (ii) Nyatakan kedua-dua jenis kaedah yang digunakan dan huraikan

cara memaku

menggunakan kaedah-kaedah tersebut.

[ 6

markah ]

c) Nyatakan tiga langkah keselamatan yang perlu diamalkan sewaktu

melakukan kerja itu di bengkel sekolah.

[ 3

markah ]

Jawapan :

4a. Pilih dan tentukan kaedah yang menghasilkan cengkaman yang kuat

dan kukuh.

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4b. Nyatakan kedua-dua jenis kaedah yang digunakan dan huraikan

cara memaku

menggunakan kaedah-kaedah tersebut.

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4c. Tiga langkah keselamatan yang perlu diamalkan sewaktu

melakukan kerja itu.

i. .......................................................................................................

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ii. .......................................................................................................

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iii. .......................................................................................................

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KHB KEMAHIRAN HIDUP TEKNIKAL (76)