The purpose of sometimes adding exothermic materials to sand is
A.To heat the sand
B.To heat the core
C.To dry the mould
D.To produce directional solidification by the generation of heat
E.To produce chilled surfaces
Category: Production Engineering Mcqs
Inside and outside diameters of a thin tube are to be measured. Only one of the following tools is to be selected. Which one would you choose?
A.Inside caliper
B.Outside caliper
C.Trammel
D.Odd-leg caliper
E.Vernier caliper
Continuous chips may be formed while machining
A.Brittle materials
B.Hard material
C.Tough material
D.Ductile material
E.Non-ferrous material
Weld spatter defect in welding is generally the result of
A.Using too high welding current
B.Using too low welding current
C.Low voltage
D.High voltage
E.None of the above
Which one of the following methods cannot be used for producing external threads?
A.One lathe
B.By dies
C.By tap
D.By rolling
In a centre lathe gear box for changing spindle speeds the provision for speeds is made in
A.Arithmetical progression
B.Geometrical progression
C.Square progression
D.Cubical progression
E.Random members
Point angle of drill is usually more while drilling
A.Mild steel
B.Marble
C.Slate
D.Soft cast iron
E.Hard alloys
Out of the following materials which one will have lowest temperature of freezing?
A.Lead
B.Zinc
C.Gold
D.Copper
E.Tungsten
Steam condenser tubes are generally made of
A.Admiralty alloy
B.Babbit metal
C.Brass
D.Bronze
E.Bell metal
Porosity of a welded joint may be caused by
A.Poor base metal
B.Low welding current
C.High welding current
D.Wrong size of electrode
E.None of the above
