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- Question
A cylinderical pressure vessel of volume 6 ?m3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to
Options- A. 5 mm
- B. 6 mm
- C. 8 mm
- D. 10 mm
- Correct Answer
- 10 mm
- 1. Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by
Options- A. making the volume of thermometer bulb as large as conveniently possible.
- B. reducing the volume of the capillary to a minimum.
- C. reducing the volume of the receiving element to a minimum.
- D. all 'a', 'b' & 'c'. Discuss
- 2. In water chemical treatment plant, use of chloramines ensures
Options- A. disinfection.
- B. taste & odour control.
- C. weed control in reservoirs.
- D. removal of permanent hardness. Discuss
- 3. The characteristic equation for the control system with a closed loop transfer function G1/1 + G2 is given by 1 + G2 = 0. The characteristic equation for the control system
Options- A. depends only upon the open loop transfer function.
- B. determines its stability.
- C. is the same for set point or load changes.
- D. all 'a', 'b' & 'c' Discuss
- 4. Hard water
Options- A. does not affect the lather formation by soap.
- B. is not unfit for drinking purpose.
- C. pollutes the water stream.
- D. all (a), (b) and (c). Discuss
- 5. The commonest form of iron & manganese found in ground water as pollutant is in the form of their
Options- A. carbonates
- B. bi-carbonates
- C. chlorides
- D. sulphides Discuss
- 6. Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?
Options- A. Nickel
- B. Brass
- C. Chromel
- D. Invar Discuss
- 7. Rate of a gaseous phase reaction is given by,
. The unit of rate constant is
Options- A. (atm)-1
- B. (hr)-1
- C. (atm)-1.(hr)-1
- D. atm.(hr)-1 Discuss
- 8. Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2 ⇌ 2NH3.
Options- A. increases
- B. decreases
- C. remains unchanged
- D. unpredictable from the data Discuss
- 9. Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
Options- A. 120
- B. 140
- C. 170
- D. 200 Discuss
- 10. A catalyst
Options- A. initiates a reaction.
- B. lowers the activation energy of reacting molecules.
- C. is capable of reacting with any one of the reactants.
- D. can not be recovered chemically unchanged at the end of a chemical reaction. Discuss
More questions
Correct Answer: all 'a', 'b' & 'c'.
Correct Answer: disinfection.
Correct Answer: all 'a', 'b' & 'c'
Correct Answer: is not unfit for drinking purpose.
Correct Answer: bi-carbonates
Correct Answer: Brass
Correct Answer: (atm)-1.(hr)-1
Correct Answer: increases
Correct Answer: 170
Correct Answer: lowers the activation energy of reacting molecules.
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