MCQ
2161. Which of the following is not the intensive property?
Pressure
Temperature
Density
Heat
2162. Extensive property of a system is one whose value-
Depends on the mass of the system like volume
Does not depend on the mass of the system, like temperature, pressure etc.
Is not dependent on the path followed but on the state
Is dependent on the path followed and not on the state
2163. In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is-
less than 2kg
more than or equal to 3.65kg
more than 10kg
there is no such consideration
2164. Specific heat of air at constant pressure is equal to-
0.17
0.21
0.24
1.0
2165. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condemer must be-
small
equal
high
anything
2166. Domestic refrigerator working on vapour compression cycle uses the following type of expansion device-
electrically operated throttling valve
manually operated valve
thermostatic valve
capillary tube
2167. Which of the following quantities is not the property of the system?
Pressure
Temperature
Specific volume
Heat
2168. Ammonia-absorption refrigeration cycle requires--
very litle work input
maximum work, input
nearly same work input as for vapour
compression cycle zero work input
2169. Absorption system normally uses the following refrigerant-
Freon-11
ammonia
Freon-22
CO
2170. Refrigeration in aeroplanes usually employs the following refrigerant-
Freon-11
Air
Freon-22
Ammonia
2171. Vapour compression refrigeration is some what like-.
Camot cycle
Rankine cycle
reversed Canet cycle
none of the above
2172. The relative coefficient of performance is-
actual COP/theoretical COP
theoretical COP/actual COP
actual COP x theoretical COP
1-actual COP x theoretical COP
2173. Which of the following is the extensive property of a themodynamic system?
Pressure
Volume
Temperature
Density
2174. Highest temperature refrigeration cycle should be encountered In near critical temperature of refrigerant--
above critical temperature
at critical temperature
much below critical temperature
none
2175. Heat and work are-
Point functions
System properties
Path functions
Intensive properties
2176. The higher temperature in compression cycle occurs at-
receiver
expansion valve
evaporator
compressor discharge
2177. Which of the following cycles uses air as the refrigerant?
Ericsson
Carmot
Stirling
Bell-coleman
2178. The ratio of two specific heats of air is equal to-
0.17
0.24
0.1
1.41
2179. The bank of tubes at the back of domestic refrigerator are-
condenser tubes
evaporator tubes
refrigerant cooling tubes
capillary tubes
2180. Presence of moisture in a refrigerant affects the working of--
compressor
condemer
evaporator
expansion valve