If you are appearing the IREL Diploma Trainee Exam 2021 for the discipline Chemical Engineering and searching IREL Diploma Trainee Chemical Previous Year Paper/Sample Paper along with IREL Diploma Trainee Syllabus 2021, then you are right place. Here, we are providing IREL Diploma Trainee Model Question Paper for your practice. IREL Diploma Trainee Chemical Engineering exam will be conducted on 05th Dec 2021.
Vikram Sarabhai Space Centre Technical Assistant Chemical Paper 2015
1 Multistage centrifugal pumps are generally used for
(a) high head
(b) low head but high discharge
(c) highly viscous liquid
(d) slurries of high solid concentration
2 A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is
(a) 1 hp
(b) 10/55 hp
(c) 5.5 hp
(d) 1/55 hp
3 In case of a super-cooled solution, which is on the verge of crystallization, the free energy of the solution as compared to that of the soild is
(a) more
(b) less
(c) same
(d) more or less depends on the nature of solution
4 Which of the fluid forces are not considered in the Reynold’s equation of flow ?
(a) viscous forces
(b) turbulent forces
(c) pressure forces
(d) compressibility forces
5 For a particle settling in water at its terminal settiling velocity, which of the following is true?
(a) Buoyancy = weight + drag
(b) weight = buoyancy + drag
(c) Drag = buoyancy + weight
(d) Drag = weight
6 Consider a duct of square cross sectin of side ‘b’. The hydraulic radius is given by
(a) b/8
(b) b/4
(c) b/2
(d) b
7 The widely used Dittus-Boelter equation is valid provided
(a) 2100 <Re< 10,000 and the properties of the fluid are evaluated at the average film temperature
(b) Re < 2100 and the properties of the fluid are evaluated at the bulk temperature
(c) 10000 < Re < 1,20,000 and the fluid properties are evaluated at the bulk temperature
(d) None of the above
8 Viscosity of gases
(a) increase very rapidly with increase in temperature
(b) increase slowly with increase in temperature
(c) decrease slowly with increase in temperature
(d) remain unaffected with increase in temperature
9 Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr.m.centigrade respectively are joined together. the temperature outside of A and C are 30 and 100 degree centigrade respectively. The interface between B and C will be at the temperature of
(a) 40 degree centigrade
(b) 95 degree centigrade
(c) 70 degree centigrade
(d) 50 degree centigrade
10 One kilogram of water at zero degree centigrade is changed to superheated steam of one atm pressure and 300 degre centigrade. The major heat consumption in the process will be to
(a) heat the water from 0 to 100 degree centigrade
(b) evaporate the water
(c) to superheat the steam
(d) data insufficient, can’t be predicted
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