Question 1 : By dividing volumetric thermal resistance by required thermal resistance we will obtain ___________
1. Power dissipation of heat sink
2. Volume of heat sink
3. Maximum temperature of heat sink
4. Volume of surrounding air
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Question 2 : Cavities embedded in heat source is also known as ___________
1. Low sink
2. Sink hole
3. On-sink
4. Inverted sink
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Question 3 : De-rating factor is usually expressed in ___________
1. W/°C
2. °C/W
3. W/s
4. kW/K
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Question 4 : Which substance is used to maintain electrical insulation between a heat sink and transistor?
1. plastic
2. fiber
3. ceramic
4. mica
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Question 5 : Heat sinks are usually provided with black anodized finish to ___________
1. Enhance heat dissipation by radiation
2. Enhance heat dissipation by convection
3. Prevent electrical connection
4. Remove dust accumulation
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Question 6 : Heat sinks are provided with peripheral fins to ___________
1. Provide good appearance
2. Increase heat absorption
3. Increase surface area of heat dissipation
4. Provide material stability
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Question 7 : Heat dissipation from heat sink take place primarily by ___________
1. Conduction
2. Convection
3. Radiation
4. All of the mentioned
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Question 8 : What is a heat spreader?
1. An older version of a heat sink
2. Another name for heat sink
3. Device to transfer heat from device to the sink
4. A connector for coolant to flow
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Question 9 : The performance of heat sink does not depend upon ___________
1. Choice of material
2. Protrusion design
3. Surface treatment
4. none of the mentioned
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Question 10 : Which of the following heat sink is used for low power application?
1. Stamped heat sink
2. Machining heat sink
3. Aluminum heat sink
4. Bolded-Fin heat sink
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