2. In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is

(A) More

(B) Less

(C) Equal

(D) Much more

Answer: Option C

3. The rolling process cannot be used to produce

(A) Plates

(B) Rods

(C) Tubes

(D) Wires

Answer: Option C

4. At the point of boundary layer separation in fluid flow, the

(A) Shear stress is maximum

(B) Velocity gradient is flat

(C) Density variation is maximum

(D) Shear stress is zero

Answer: Option A

5. In "Imperial Smelting Process" for extraction of zinc, zinc vapor thus produced is quenched in the external condenser by the use of the following:

(A) Jet of water at high pressure

(B) Blast of air

(C) Mixture of water and air

(D) Rain of molten lead

Answer: Option D

6. _________ flux is used for the extraction of metal from its self fluxing ores.

(A) No

(B) Acid

(C) Basic

(D) Neutral

Answer: Option A

7. The most suitable material of construction for a sewer to carry sewage under high pressure is

(A) Asbestos cement

(B) Steel

(C) Cement concrete

(D) Stoneware

Answer: Option B

8. Uniform ramming of sand in green sand moulding process leads to

(A) Reduced chance of gas porosity

(B) Greater dimensional stability of the casting

(C) Uniform flow of molten metal into the mould cavity

(D) Less sand expansion type of casting defect

Answer: Option B

9. Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about

(A) 1

(B) 10

(C) 25

(D) 50

Answer: Option B

10. Which of the following is not a dielectric material?

(A) Cotton, silk and paper

(B) Asbestos, glass, porcelain and mica

(C) Rubber and polymeric resins

(D) All refractory materials

Answer: Option C

11. During decarburizing of a plain carbon steel, the thickness of ferrite layer growth is proportional to

(A) Time

(B) Square root of time

(C) Square of time

(D) Cube of time

Answer: Option B

12. Particle nature of cathode rays is proved due to the fact that they

(A) Travel in a straight line

(B) Get deflected by magnetic electric field

(C) Produce fluorescence

(D) Heat the exposed material

Answer: Option B

13. Property responsible for the talcum powder to cling to the skin is the

(A) Capillary action

(B) Adhesion

(C) Cohesion

(D) Surface tension

Answer: Option B

14. Which of the following is prone to cup and cone fracture?

(A) Cast iron

(B) Soft brass

(C) Round specimen of ductile metal

(D) Flat tensile specimen of ductile metal

Answer: Option C

15. Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost

(A) Only

(B) Plus variable cost

(C) Plus overhead cost

(D) Plus selling expenses

Answer: Option B

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01. Answer: Option A
02. Answer: Option C
03. Answer: Option C
04. Answer: Option A
05. Answer: Option D
06. Answer: Option A
07. Answer: Option B
08. Answer: Option B
09. Answer: Option B
10. Answer: Option C
11. Answer: Option B
12. Answer: Option B
13. Answer: Option B
14. Answer: Option C
15. Answer: Option B

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