54) The main purpose of an air conditioner filter is to keep the A) Fan blades c
ID: 2073675 • Letter: 5
Question
54) The main purpose of an air conditioner filter is to keep the A) Fan blades clean B) Ducts clean C) Motor clean D) Coils clean SS) Convection, conduction and radiation are terms normally related with A) Movement of:air B) Transfer of. heat C) Diffusion of light D) Movement of .gases 56) When throttling is required, the proper valve to install is a A) Globe valve B) Gate valve c) Check valve D) Plug valve 57) Traps are used in steam heating systems to: A) Reduce the steam pressure B) Collect dirt C) Separate minerals from the water D) Separate air and water from steanExplanation / Answer
C54)- option - B.
Filters help to keep dust from building up in your ducts. They are essential in air conditioning equipment to provide clean, fresh air without any dust and particulate particles. They help us protecting inside air conditioning unit parts such as fan, condenser, evaporator.
55) option-B
Conduction, convection and radiation are the terms related to heat energy transfer by virtue of temperature difference.
conduction refers to the transfer of heat within solid body or between two solid bodies due to free electron motion or atomic vibrations.
Convection involves fluid motion. Transfer of heat from the solid body to the fluid medium.
Radiation does not require any medium to propagate heat. Heat transfer happens in the form of electromagnetic waves.
56)Option - A.
When throttling is required globe valve is used. Globe valves are used to start, stop and throttle the flow.
The gate valve is just a sliding valve which is used to regulate the flow in straight pipes.
The check valve closes to prevent the backward flow of fluid in the pipe.
Plug valves are used to control the flow.
57) option -D
Steam traps are used to separate condensate and non-condensate gases. Condensate is sent to feed pump for circulation.
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