Aux 1 Unit 7 Q7

1 / 10

What is the primary function of a refrigerated air dryer in a pneumatic control system?

B) To cool the compressed air, causing moisture to condense and be removed from the system

C) To filter out solid particles from the compressed air

A) To increase the pressure of the compressed air

D) To heat the compressed air to evaporate moisture

2 / 10

What is a potential advantage of using a refrigerated air dryer in a pneumatic system?

D) It also filters out solid particles from the air

C) It requires no energy to operate

B) It provides consistent drying performance with minimal maintenance

A) It increases the air pressure, making the system more efficient

3 / 10

What is a potential advantage of using a desiccant air dryer in a pneumatic system?

D) It also acts as a noise reducer in the system

B) It increases the air temperature, improving system performance

C) It requires no desiccant replacement over time

A) It is highly effective at removing moisture, achieving very low dew points

4 / 10

How does a refrigerated air dryer achieve moisture removal in compressed air?

A) By using a heat source to evaporate water from the air

D) By compressing the air further to reduce its volume

B) By lowering the air temperature to the dew point, where moisture condenses into liquid form

C) By filtering the air through a desiccant material

5 / 10

Which desiccant material is commonly used in desiccant air dryers for moisture removal?

A) Activated carbon

D) Iron filings

B) Silica gel or activated alumina

C) Calcium carbonate

6 / 10

What is the primary function of a desiccant air dryer in a pneumatic control system?

D) To heat the air to evaporate moisture

B) To use a desiccant material that absorbs moisture from the air, leaving it dry

C) To filter out solid particles from the compressed air

A) To increase the pressure of the compressed air

7 / 10

Which method of drying compressed air is typically more energy-efficient and requires less maintenance?

D) Neither method is energy-efficient

B) Desiccant air dryer

A) Refrigerated air dryer

C) Both methods are equally energy-efficient

8 / 10

What is a common application where a desiccant air dryer would be preferred over a refrigerated air dryer?

D) Cooling systems in HVAC applications

C) Air supply for inflating tires

A) General manufacturing with low sensitivity to moisture

B) Pneumatic control systems in freezing conditions where even small amounts of moisture can cause issues

9 / 10

Which method of drying compressed air is more suitable for applications requiring extremely low moisture levels?

B) Desiccant air dryer

C) Both methods are equally suitable

D) Neither method is suitable for low moisture levels

A) Refrigerated air dryer

10 / 10

Which of the following is a drawback of using a desiccant air dryer in a pneumatic system?

B) The desiccant material needs to be replaced or regenerated regularly, which can increase maintenance costs.

A) It is less effective at removing moisture than a refrigerated dryer.

C) It consumes more energy than a refrigerated dryer.

D) It cannot be used in systems that operate at high pressure.

Your score is