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UPSC Recruitment Paper 2017 : Deputy Controller of Explosives (Chemical Engineering & Chemistry)

UPSC

UPSC Recruitment Paper 2017 : Deputy Controller of Explosives

(Chemical Engineering & Chemistry)

1. The condition of stable equilibrium for a floating body is:
(a) The metacentre M coincides with the centre of gravity G
(b) The metacentre M is below the centre of gravity G
(c) The metacentre M is above the centre of gravity G
(d) The centre of buoyancy B is above the centre of gravity G

2. For a submerged curved surface, the vertical component of the hydrostatic force is:
(a) Mass of the liquid supported by the curved surface
(b) Weight of the liquid supported by the curved surface
(c) The force on the projected area of the curved surface on vertical plane
(d) Centriod of the liquid displaced by the body

3. The least radius of gyration of a ship is 8 m and metacentric height is 70 cm. Then the time period of oscillation of the ship is nea rly:
(a) 19.2 s
(b) 17.4 s
(c) 15.6 s
(d) 13.8 s

4. The flow of water leaving the impeller in a centrifugal pump casing is:
(a) Forced vortex flow
(b) Free vortex flow
(c) Centrifugal flow
(d) Centripetal force

5. A mouthpiece is a short length of pipe fitted to a tank containing flui d.Which one of the following mouthpiece s is having a maximum coefficient of discharge?
(a) External mouthpiece
(b) Convergent-divergent mouthpiece
(c) Internal mouthpiece
(d) Cylindrical mouthpiece

6. Hydraulic Gradient Line (HGL) is the sum of:
(a) Pressure head and kinetic head
(b) Kinetic head and datum head
(c) Pressure head, kinetic head and datum head
(d) Pressure head and datum head

7. Three pipes of length 800 mm, 500 mm and 400 mm and a diameter of 500 mm,400 mm and 300 mm respectively are connected in series. These pipes are to be replaced by a single pipe of length 1700 mm, and then the diameter of the single pipe should be nearly: 
(a) 324 mm
(b) 344 mm
(c) 372 mm
(d) 412 mm
8. A smooth plate of length 4 mm and width 1.5 mm is moving with a velocity of 4 m/s in stationary air. If the kinematic viscosity of air is 1.5 × 10−5 m2/s, the thickness of the boundary layer at the trailing edge of the plate will be: 
(a) 83.4 mm
(b) 86.3 mm
(c) 89.2 mm
(d) 92.1 mm

9.  How many number of pumps are required to take out the water, from a deep well under a total head of 89 mm, assuming that all pumps are identical and are running at 800 rpm, the specific speed of each pump is  25, while rated capacity of each pump is 0.16 m3/s                                                                
(a) 3
(b) 4
(c) 5
(d) 7

10. The thermal conductivity (k) of insulators:
(a) Increases with increase in temperature
(b) Always increases with increase in the density of the material
(c) Decreases with increase in temperature
(d) Decreases due to convection phenomenon in insulators

Click Here to Download Full Paper PDF

Printed Study Material for UPSC Exams

Courtesy : UPSC

UPSC Recruitment Paper 2017 : Foreman (Chemical) in Directorate General of Aeronautical Quality Assurance (Aptitude Test)

UPSC

UPSC Recruitment Paper 2017 : Foreman (Chemical) in Directorate General of Aeronautical Quality Assurance

(Aptitude Test)

1. Cordite, an explosive material is prepared from:
(a) 93% Nitro-glycerine and 7% Gun-cotton
(b) Cool mixture of HNO3 and H2SO4
(c) Gelatinized combination of Nitro-glycerine and Nitro-cellulose
(d) 79% Potassium Chloride and 21% Nitro-benzol

2. Consider the following materials:
1. Sand
2. Granite
3. Clay Brick
4. Steel
What is the correct sequence in the  increasing order of their bulk density?

 (a) 1, 3, 2 and 4
(b) 3, 1, 2 and 4
(c) 1, 3, 4 and 2
(d) 3, 4, 1 and 2

3. The equation: λ = h/m.v =h/p describes:
where: λ is the wavelength of the particle, h is the Plank’s constant and p is the momentum of the particle
(a) Sommerfeld’s relative atomic model
(b) Bohr’s Quantum atomic model
(c) Thomson’s Plum pudding atomic model
(d) De-Broglie’s atomic model

4. Which one of the following is not a  neutral refractory material?
(a) Carbon
(b) Bauxite
(c) Chromite
(d) Dolomite

5. Flint glass is also called as:
(a) Soda-lime glass
(b) Potash- lime glass
(c) Potash- lead glass
(d) Borosilicate glass

6. The yield of concrete per bag of cement for a concrete mix of 1: 2: 4 proportions is nearly:
(a) 0.18 m3
(b) 0.16 m3
(c) 0.14 m3
(d) 0.12 m3

7. Which one of the following minerals is  not found in the sedimentary rocks?
 (a) Calcite
(b) Gypsum
(c) Magnesite
(d) Feldspar

8. Which one of the following oils is the commonly used as vehicle of a paint?
 (a) Nut oil
(b) Linseed oil
(c) Poppy oil
(d) Tung oil

9. Which one of the following is an example for a biodegradable plastic?
(a) Polybutadienehydroxide
(b) Chlorofluorocarbon
(c) Polyhydroxyalkanoate
(d) Melamine formaldehyde

10. Bitumen completely dissolves in which one of the following solvents?
(a) Water
(b) Carbon monoxide
(c) Carbon dioxide
(d) Carbon bisulphide

Click Here to Download Full Paper PDF

Printed Study Material for UPSC Exams

Courtesy : UPSC

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