Which of the following refrigerant has the lowest freezing point? Mark as favorite Copy Link R-11 R-12 R-22 Ammonia Check Answer
The natural convection air cooled condensers are used in? Mark as favorite Copy Link domestic refrigerators water coolers room air conditioners all of these Check Answer
In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the? Mark as favorite Copy Link Reynold's number Grashoff's number Reynold's number, Grashoff's number Prandtl number, Grashoff's number Check Answer
The minimum temperature to which water can be cooled in a cooling tower is? Mark as favorite Copy Link dew point temperature of air wet bulb temperature of air dry bulb temperature of air ambient air temperature Check Answer
Radiation is the process of heat transfer in which heat flows from ……….. in a straight line, without affecting the intervening medium? Mark as favorite Copy Link cold body to hot body hot body to cold body smaller body to larger body larger body to smaller body Check Answer
The heat transfer takes place according to? Mark as favorite Copy Link Zeroth law of thermodynamics First law of thermodynamics Second law of thermodynamics Kirchhoff's law Check Answer
Which of the following statement is correct for ammonia as a refrigerant? Mark as favorite Copy Link It is toxic to mucous membranes it requires large displacement per TR compared to fluoro carbons It reacts with copper and its alloys all of these Check Answer
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be? Mark as favorite Copy Link lack of cooling water water temperature being high dirty condenser surface all of these Check Answer
The pressure at the outlet of a refrigerant compressor is called? Mark as favorite Copy Link suction pressure discharge pressure critical pressure back pressure Check Answer
In larger industrial and commercial reciprocating compression systems, refrigerent widely used is? Mark as favorite Copy Link ammonia carbon dioxide sulphur dioxide R-12 Check Answer