Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. Water is used as a in air conditioning units.
a. absorbent
b. refrigerant
c. absorbent and refrigerant
d. none of the mentioned
Q. Room air conditioners and packaged units are examples of
a. direct expansion systems
b. indirect expansion systems
c. chilled water systems
d. indirect contraction systems
Q. Which of the following is not a component of packaged air conditioners?
a. compressor
b. condenser
c. chiller
d. evaporator
Q. In which component of the chilled water system, the return air and the fresh air mixture is filtered?
a. fan coil unit
b. ducting grill
c. compressor
d. evaporator
Q. Which of the following qualities is not possessed by the filters in the air conditioning system?
a. they should be capable of removing dust particles from the incoming air
b. they should afford easy cleaning
c. they should offer low frictional resistance to the airflow
d. they should offer high frictional resistance to the airflow
Q. Which of the following statements about electric precipitators is false?
a. they are used to remove dust by providing a strong electric field
b. their initial installation cost is high
c. their operational cost is low
d. dust particles get attached to the positive electrode
Q. The process of extraction of the certain required amount of water from air is known as
a. heating
b. cooling
c. humidification
d. dehumidification
Q. Which of the following is capable of absorbing excess moisture from the air?
a. silica gel
b. charcoal
c. salts of calcium or ammonia
d. activated alumina
Q. Open cooling system is also called as
a. parallel system
b. once through system
c. air based system
d. non-reversible system
Q. Which of the following is the simplest method of cooling the condenser water?
a. spray cooling pond
b. cooling tower
c. indirect air cooling
d. hyperbolic cooling tower
Q. In which type of cooling system are nozzles arranged on different elevation?
a. single deck system
b. double deck system
c. natural flow system
d. direct flow system
Q. What are used in the direct flow system to transverse the pond before uniting at intake?
a. separators
b. filters
c. baffle walls
d. porous pipes