In case of lifting magnets, for releasing the material lifted
A.hooks are used
B.direction of dc current is reversed
C.ac current is passed through the coil
Category: Materials Handling Mcqs
In case of pneumatic conveyors the minimum diameter of bend should be at least
A.two
B.three
C.six
D.ten
In case of skip hoists, the hoisting speed generally ranges from
A.1 to 5 m/s
B.6 to 15 m/s
C.20 to 30 m/s
D.30 to 50 m/s
A shovel having dipper capacity of one cubic metre working on good common earth will handle approximately
A.15 cubic metes/hour
B.45 cubic metres/hour
C.100 cubic metres/hour
D.175 cubic metres/hour
The method of speed control used on 25 kV, 50 Hz single phase traction is
A.tap changing control of transformer
B.reduced current method
C.series parallel operation of motors
D.Any of the above
In case of screw conveyors, cut flights are used for
A.grains
B.cereals
C.light materials
D.all of the above
In which case, the permissible incline in belt conveyor will be minimum?
A.Clay, dry fine
B.Dry silica sand
C.Powdered lime
D.Coal, slack
The handling capacity of a drag line having buckets of one cubic metre capacity is expected to be highest in case of
A.light moist clay
B.sand or gravel
C.clay, wet sticky
D.clay, hard tough
In case of a single girder overhead travelling crane, the section used is
A.a channel
B.I-beam
C.angle iron
D.Z-section
In case of pneumatic system, a receiver is
A.a device for cleaning air
B.a device for cooling air
C.a divice for storing atmospheric air
D.a device for storing compressed air
