Discussion
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- Question
In a pressure enthalpy chart, the space between the saturated liquid line and saturated vapour line, represents sub-cooled liquid region.
Options- A. True
- B. False
- Correct Answer
- False
- 1. Jigs are used
Options- A. for holding and guiding the tool in drilling, reaming or tapping operations
- B. for holding the work in milling, grinding, planing or turning operations
- C. to check the accuracy of workpiece
- D. none of the above Discuss
- 2. During sensible cooling of air __________ decreases.
Options- A. wet bulb temperature
- B. relative humidity
- C. dry bulb temperature
- D. specific humidity Discuss
- 3. The saw milling is an operation of
Options- A. producing grooves around the periphery of a cylindrical or conical workpiece
- B. producing narrow slots or grooves on a workpiece
- C. reproduction of an outline of a template on a workpiece
- D. machining several surfaces of a workpiece simultaneously Discuss
- 4. The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called
Options- A. compressor efficiency
- B. volumetric efficiency
- C. isothermal efficiency
- D. mechanical efficiency Discuss
- 5. Side rake angle of a single point cutting tool is the angle
Options- A. by which the face of the tool is inclined towards back
- B. by which the face of the tool is inclined sideways
- C. between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool
- D. between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base Discuss
- 6. While designing the refrigeration system of an aircraft, the prime consideration is that the
Options- A. system has high C.O.P.
- B. power per TR is low
- C. mass of refrigerant circulated in the system is low
- D. mass of the refrigeration equipment is low Discuss
- 7. The material in which the atoms are arranged chaotically, is called
Options- A. amorphous material
- B. mesomorphous material
- C. crystalline material
- D. none of these Discuss
- 8. Theoretically, a four stroke cycle engine should develop __________ power as that of a two stroke cycle engine.
Options- A. half
- B. same
- C. double
- D. four times Discuss
- 9. In a two stroke engine, the working cycle is completed in two revolutions of the crankshaft.
Options- A. Correct
- B. Incorrect Discuss
- 10. Which of the following statement is wrong?
Options- A. In compression ignition engines, detonation occurs near the beginning of combustion.
- B. Since the fuel, in compression ignition engines, is injected at the end of compression stroke, therefore, there will be no pre-ignition.
- C. To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.
- D. In compression ignition engines, because of hetrogeneous mixture, the rate of pressure rise is comparatively lower. Discuss
More questions
Correct Answer: for holding and guiding the tool in drilling, reaming or tapping operations
Correct Answer: dry bulb temperature
Correct Answer: producing narrow slots or grooves on a workpiece
Correct Answer: mechanical efficiency
Correct Answer: by which the face of the tool is inclined sideways
Correct Answer: mass of the refrigeration equipment is low
Correct Answer: amorphous material
Correct Answer: half
Correct Answer: Incorrect
Correct Answer: To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.
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