During the tensile test on a glass rod, the nature of stress section curve is
A.Straight line
B.Vertical line
C.Horizontal line
D.Sudden break
E.Same as that for mild steel
A.Straight line
B.Vertical line
C.Horizontal line
D.Sudden break
E.Same as that for mild steel
A.10 m/min
B.20 m/min
C.30 m/min
D.40 m/min
E.50 m/min
A.increase the efficiency
B.decrease the efficiency
C.increase or decrease the efficiency
D.None of the above
A.The price of a commodity and the quantity demanded
B.The income of consumer and the quantity demanded
C.The relationship betweent he price of one commodity and the price of a substitute
D.The price of two commodities
E.All of the above
A.Diamagnetic field
B.Paramagnetic field
C.Ferromagnetic field
D.All of the above
E.None of the above
A.Facing sand
B.Floor sand
C.Dry-sand
A.Skip hoists
B.Bucket elevators
C.Winches
D.Escalators
A.Bevel gears
B.Helical gears
C.Spur gears
D.Herringbone gears
E.Worm gears
A.ML2T
B.ML3T-2
C.ML5T-2
D.ML6T-2
A.is a compound of iron and carbon
B.is characterized by an orthorhombic crystal structure
C.has the approximate chemical formula Fe3C
D.all of these answers