The hardness of steel depends on
A.Heating temperature before quenching
B.Amount of carbon it contains
C.The shape and distribution of carbides in iron
D.Percentage of alloying elements
E.Basic process from which it is produced
Category: Mechanical Engineering Mcqs
Commonly adopted material for rivets in
A.Mild steel
B.Cast iron
C.Wrought iron
D.Malleable iron
E.None of the above
For short-distance transmission, the methods of transmission that can be used is
A.Hydraulic
B.Pneumatic
C.Electric and electronic
D.Any of the above
E.None of the above
A point angle of 135 – 150? on twist drills is used for drilling
A.Mild steel
B.Cast iron
C.Bakelite
D.Plastics
E.Hard steels and nickel alloys
Mcleod gauge is used to measure
A.Pressure
B.Vacuum
C.Flow rate
D.Suspended matter
E.pH value
In a drilling machine having six spindle speeds if first five speeds are 458, 605, 800, 1055 and 1390 rpm, the next higher speed would be
A.1440 rpm
B.1500 rpm
C.1630 rpm
D.1760 rpm
E.1830 rpm
Laser is a device to produce
A.a beam of white light
B.a beam of coherent light
C.microwaves
D.gamma rays
The efficiency in case of worm gear drives is generally in the range
A.10-25 percent
B.25-40 percent
C.40 – 60 percent
D.50-70 percent
E.70-85 percent
In case of involute the angular velocity ratio is
A.Directly proportional to radius of base circle from which the involute was generated
B.Inversely proportional to radius of base circle from which the involute was generated
C.Directly proportional to the distance of the chord over which thread is unwound
D.Inversely proportional to the distance of the chord over which thread is wound
E.None of the above
Water and sediments in a diesel fuel oil must not exceed.
A.1%
B.0.50%
C.0.10%
D.0.05%
E.0.01%
