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: Mechanical Engineering Mcqs
The included angle of a lathe centre is generally
A.15?
B.22
C.30?
D.45?
E.60?
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
Which of the following is a parallel activity?
A.Wall construction and carpentary work of doors
B.digging of foundation and construction of a well
C.completion of flooring and plastering of walls
D.completing first floor and starting second floor construction
The surface speed of grinding wheel in case of centreless grinding is
A.15 – 75 M/min
B.100 – 500 M/min
C.500 – 800 M/min
D.1000 – 1500 M/min
E.1500 – 1800 M/min
In a glass metal seal the two components must match with respect to their
A.Hardness
B.Thermal expansion
C.Ductility
D.Fatigue strength
