Discussion
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- Question
The relative humidity is defined as
Options- A. the mass of water vapour present in 1 m3 of dry air
- B. the mass of water vapour present in 1 kg of dry air
- C. the ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure.
- D. the ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure
- Correct Answer
- the ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure
- 1. The neutral axis of a beam is subjected to __________ stress.
Options- A. zero
- B. maximum tensile
- C. minimum tensile
- D. maximum compressive Discuss
- 2. The law of the machine is(where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)
Options- A. P = mW - C
- B. P = m/W + C
- C. P = mW + C
- D. P = C - mW Discuss
- 3. A long delay period in compression ignition engines gives a more rapid rise in pressure which causes knocking.
Options- A. Yes
- B. No Discuss
- 4. A reinforced cement concrete beam is considered to be made of
Options- A. homogeneous material
- B. hetrogeneous material
- C. composite material
- D. isotropic material Discuss
- 5. The function of a crosshead is to guide motion of the __________ and to prevent it from bending.
Options- A. piston rod
- B. connecting rod
- C. eccentric rod
- D. valve rod Discuss
- 6. A diesel engine is __________ as compared to petrol engine, both running at rated load.
Options- A. equally efficient
- B. less efficient
- C. more efficient Discuss
- 7. The temperature rise, between the condenser outlet and expansion valve in ammonia vapour compression system, should be as low as possible.
Options- A. Yes
- B. No Discuss
- 8. Dielectric is used in
Options- A. electro-chemical machining
- B. ultra-sonic machining
- C. electro-discharge machining
- D. laser machining Discuss
- 9. Two beams, one of circular cross-section and the other of square cross-section, have equal areas of cross-sections. When these beams are subjected to bending,
Options- A. both beams are equally economical
- B. square beam is more economical
- C. circular beam is more economical
- D. none of these Discuss
- 10. A fission chain reaction in uranium can be developed
Options- A. by increasing the contents of U235
- B. by slowing down fast neutrons so that U235 fission continues by slow neutron
- C. both (a) and (b)
- D. none of these Discuss
More questions
Correct Answer: zero
Correct Answer: P = mW + C
Correct Answer: Yes
Correct Answer: hetrogeneous material
Correct Answer: piston rod
Correct Answer: more efficient
Correct Answer: Yes
Correct Answer: electro-discharge machining
Correct Answer: square beam is more economical
Correct Answer: both (a) and (b)
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