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- Question
What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?
Options- A. 6.5 cms
- B. 6.5 mm
- C. Equal to tube I.D
- D. Equal to tube O.D
- Correct Answer
- 6.5 mm
- 1. Liquid flow rate in an open channel can not be measured by a/an
Options- A. orifice meter
- B. cipolletti weir
- C. rectangular weir
- D. V-notch Discuss
- 2. Thermocole (expanded polystyrene) is not used for
Options- A. low temperature thermal insulation as in refrigerator and air conditioners.
- B. accoustic control and ceiling for building.
- C. high temperature thermal insulation in furnaces.
- D. packing of delicate electronic gadgets. Discuss
- 3. The rate controlling step in the manufacture of silicone rubber is the
Options- A. polymer termination step.
- B. condensation of siloxane to silicone.
- C. initial hydrolysis of silicone monomer.
- D. none of these. Discuss
- 4. In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?
Options- A. PTFE
- B. Buna-S
- C. PMMA
- D. Polycaprolactum Discuss
- 5. Linde gas liquefaction process employs cooling
Options- A. by throttling
- B. by expansion in an engine
- C. at constant pressure
- D. none of these Discuss
- 6. The pressure (kg/cm2 ) and temperature (°C) maintained in electrical desalters for crude oil are respectively
Options- A. 10 and 120
- B. 1 and 200
- C. 50 and 250
- D. 10 and 300 Discuss
- 7. Pick out the wrong statement
Options- A. Proportional controller is normally used for level control in industrial applications.
- B. CSTR can be considered as a distributed parameter system.
- C. Distributed parameter approach gives partial differential equation.
- D. Non-linear behaviour is exemplified by an on-off controller. Discuss
- 8. Molecular weight of polymers are in the range of
Options- A. 10 to 103
- B. 102-107
- C. 107-109
- D. 109-1011 Discuss
- 9. Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.
Options- A. 50
- B. 75
- C. 90
- D. 99 Discuss
- 10. Naphtha in a fertiliser plant is used as a source of
Options- A. fuel
- B. H2
- C. N2
- D. O2 Discuss
More questions
Correct Answer: orifice meter
Correct Answer: high temperature thermal insulation in furnaces.
Correct Answer: initial hydrolysis of silicone monomer.
Correct Answer: Buna-S
Correct Answer: by throttling
Correct Answer: 10 and 120
Correct Answer: CSTR can be considered as a distributed parameter system.
Correct Answer: 102-107
Correct Answer: 90
Correct Answer: H2
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