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pipe 261-280

Authored by 洪立翰 洪立翰

Social Studies

9th Grade

Used 9+ times

pipe 261-280
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1 卡等於多少焦耳?

0.24

4.2

10

1000

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1 BTU的熱量等於多少卡?

4.2

252

460

746

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

電動機名牌所註明之電流係指

滿載電流

空載電流

半載電流

80%滿載電流

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

電動機名牌上標示之馬力數係指其

效率

損失

輸出功率

輸入功率

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

冷氣機若運轉之負載不變,假設供電電壓比額定電壓低時,其負載電流?

降低

升高

先減後增

先增後減

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

電路供應工業用紅外線燈電熱裝置者,其對地電壓應不超過多少伏為原則?

110

150

220

380

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

電源頻率由60赫(Hz)變成50赫(Hz)時,下列哪一器具之阻抗值較不受影響?

白熾燈

變壓器

感應電動機

日光燈

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