Sand acquires a predetermined shape under pressure and retains the same when pressure is removed. This is due to the property of sand known as
A.Cohesiveness
B.Plasticity
C.Refractoriness
D.none of the above
Category: Engineeeing Mcqs
In case of a body transparent to thermal radiation
A.absorptivity = 1
B.reflectivity = 1
C.absorptivity = reflectivity = 0
D.transmissibility = 0
The included angle of a lathe centre is generally
A.15?
B.22
C.30?
D.45?
E.60?
The process of protection of iron by coating with zinc is called
A.tempering
B.galvanizing
C.nitriding
D.smelting
Thermosetting polymers are
A.Injection moulded
B.Extruded
C.Cast moulded
D.None of the above
Which of the following is used on moulds for magnesium castings to prevent metal mould reactions?
A.Boric sulphur
B.Molasses
C.Charcoal
D.all of the above
1 watt is the same as
A.103 ergs/s
B.1010 ergs/s
C.105 ergs/s
D.106 ergs/s
E.107 ergs/s
The critical temperature for Freon 12 is
A.Less than – 50?C
B.Around – 20?C
C.0?C
D.Around 50?C
E.Above 100?C
A body cools from 80?C to 70?C in 10 minutes. The time taken by the body for further cooling to 60?C will be
A.5 minutes
B.7 minutes
C.10 minutes
D.Less than 10 minutes
E.More than 10 minutes
