Discussion
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- Question
Which of the following bladings will give maximum pressure rise in a centrifugal compressor, assuming the same overall dimensions, blade inlet angle and rotational speeds?
Options- A. Forward curved blades
- B. Backward curved blades
- C. Radial blades
- D. all of these
- Correct Answer
- Forward curved blades
- 1. A grinding wheel is said to be of __________ if the abrasive grains can be easily dislodged.
Options- A. soft grade
- B. medium grade
- C. hard grade Discuss
- 2. During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.
Options- A. equal to
- B. equal and opposite to
- C. less than
- D. greater than Discuss
- 3. The force which acts along the radius of a circle and directed towards the centre of the circle is known as centripetal force.
Options- A. True
- B. False Discuss
- 4. Which one of the following material will require the largest size of riser for the same size of casting?
Options- A. Aluminium
- B. Cast iron
- C. Steel
- D. Copper Discuss
- 5. According to Euler's column theory, the crippling load of a column is given by p = ?2 EI/Cl2. In the Euler's formula, the value of C for a column with both ends fixed is 4.
Options- A. Agree
- B. Disagree Discuss
- 6. The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)
Options- A. V = 44.72 hd K
- B. V = 44.72 K hd
- C. V = 44.72 K hd
- D. V = 44.72 K hd Discuss
- 7. Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
Options- A. Babbit metal
- B. Monel metal
- C. Nichrome
- D. Phosphor bronze Discuss
- 8. The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the free end.
Options- A. zero
- B. wl/4
- C. wl/2
- D. wl Discuss
- 9. With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
Options- A. decrease
- B. increase
- C. remain unchanged
- D. depend upon the characteristics of liquid Discuss
- 10. The specific humidity during cooling and dehumidification
Options- A. remains constant
- B. increases
- C. decreases Discuss
More questions
Correct Answer: soft grade
Correct Answer: equal and opposite to
Correct Answer: True
Correct Answer: Steel
Correct Answer: Disagree
Correct Answer: V = 44.72 K hd
Correct Answer: Nichrome
Correct Answer: zero
Correct Answer: decrease
Correct Answer: decreases
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