Rajasthan Technical Education Second Year Paper 2016 – Mechanical Operations

Rajasthan Technical Education Second Year Paper 2016 – Mechanical Operations

Which of the following is a pressure filter ?
(a) Sand filter
(b) Leaf filter
(c) Rotary drum filter
(d) Plate and frame filter

Diatomaceous earth is a/an
(a) Filter medium
(b) Filter aid
(c) Explosives
(d) Catalyst

Which conveyor is used for the short distance transportation of grain, gravel, sand, ash, asphalt ?
(a) Ribon conveyor
(b) Bucket elevator
(c) Screw conveyor
(d) Flight conveyor

The value of angle of nip is generally about
(a) 32 degree
(b) 16 degree
(c) 64 degree
(d) 52 degree

The main size reduction operation in ultrafine grinder is
(a) Cutting
(b) Impact
(c) Compression
(d) Attrition

Balls for ball mills are never made of
(a) Alloy steel
(b) Cast iron
(c) Lead
(d) Cast steel

Screening capacity is NOT a function of
(a) Screening surface
(b) It’s opening size
(c) Atmospheric humidity
(d) Screening mechanism

Length/diameter ratio of a ball mill is
(a) 1.5
(b) >1
(c) 1
(d) <1

If the capcity of a screen is increased, it’s effectiveness
(a) does not effect
(b) decreases
(c) increases
(d) None of these

In continous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the
(a) Square root of velocity
(b) Square of viscosity
(c) Filtration time only
(d) Washing time only

The capacity of a pneumatic conveying system depends upon the
(a) Bulk density of materials
(b) Pressure of the conveying air
(c) Diameter of the conveying line
(d) All of above

Range of compressibility coefficient of the commercial compressible cake obtained in filtration operation is
(a) 0.01 to 0.1
(b) 0.1 to 0.3
(c) 0.2 to 0.8
(d) 0.2 to 0.4