
soal heat exchanger
Authored by era yulianti
Science
12th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Sejenis gas beracun berada dalam ruang tertutup berbentuk tabung dengan penampang melintang 80 cm2. jika terjadi perubahan suhu sebesar 77 C dan koefisien konveksi gas 80 W/mK, maka laju perpindahan kalor dalam gas beracun tersebut adalah....
49 W/m
64 W/m
192 W/m
224 W/m
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Batang logam dengan panjang 2 meter, memiliki luas penampang 20 cm2 dan perbedaan suhu kedua ujungnya 50 C, jika koefisien konduksi termalnya 0,2 kal/msC. tentukan jumlah kalor yang dirambatkan persatuan waktu !
0,01 kal/s
0,02 kal/s
0,03 kal/s
0,04 kal/s
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Suatu fluida dengan koefisien konveksi termal 0,01 kal/ms0C memiliki luas penampang aliran 20 cm2. Jika fluida tersebut mengalir dari dinding yang bersuhu 100C ke dinding lainnya yang bersuhu 20 C, kedua dinding sejajar. Brapakah keluarnya kalor yang dirambatkan !
16 x 10-4 kal.m/s
17 x 10-4 kal.m/s
18 x 10-4 kal.m/s
19 x 10-4 kal.m/s
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Sebuah lampu pijar menggunakan kawat wolfram dengan luas 10-6 dan emisivitas 0,5. bila bola lampu tersebut berpijar pada suhu 1000 K selama 5 sekon ( tetapan boltzman = 5,67 x 10-8 W/m2 K4 ). Hitunglah jumlah energi radiasi yang dipancarkan ....
14,175 x 10-2 W/s
14,175 x 10-3 W/s
14,175 x 10-4 W/s
14,175 x 10-5 W/s
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Faktor-faktor yang tidak memengaruhi laju perpindahan kalor secara konduksi pada sebuah logam adalah ….
konduktivitas termal
perbedaan suhu
emisivitas
luas penampang
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Type dari heat exchanger yang berfungsi untuk mengembunkan uap atau campuran uap dan menggunakan air sebagai media pendingin adalah....
Cooler
Condenser
Chiller
Reboiler
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Alat penukar kalor yang digunakan untuk mendinginkan fluida cair, gas dengan menggunakan media pendingin air atau udara disebut …
Kondensor
Chiller
Cooler
Reboiler
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