Discussion
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- Question
In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
Options- A. exit nozzle, which is a constant volume process
- B. exit nozzle, which is essentially an isentropic process
- C. turbine blades, which is a constant volume process
- D. turbine blades, which is essentially an isentropic process
- Correct Answer
- turbine blades, which is essentially an isentropic process
- 1. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)
Options- A. VnT = C
- B. VTn = C
- C. Vn/T = C
- D. V/Tn = C Discuss
- 2. The casting method adopted for ornaments and toys of non-ferrous alloys, is
Options- A. permanent mould casting
- B. slush casting
- C. die casting
- D. centrifugal casting Discuss
- 3. The ratio of the cumulative heat drop to the isentropic heat drop is called reheat factor.
Options- A. Yes
- B. No Discuss
- 4. The hoop stress in a thin cylindrical shell is
Options- A. longitudinal stress
- B. compressive stress
- C. radial stress
- D. circumferential tensile stress Discuss
- 5. The scavenging efficiency of a four stroke cycle diesel engine is
Options- A. below 50%
- B. between 50 and 85%
- C. between 85 and 95%
- D. between 95 and 100% Discuss
- 6. In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into
Options- A. atmosphere
- B. vacuum
- C. discharge nozzle
- D. back to the compressor Discuss
- 7. The average value of diagram factor lies between
Options- A. 0.2 to 0.5
- B. 0.5 to 0.65
- C. 0.65 to 0.9
- D. 0.8 to 1.2 Discuss
- 8. If the section modulus of a beam is increased, the bending stress in the beam will
Options- A. not change
- B. increase
- C. decrease Discuss
- 9. The correct way to rectify an imbalanced wheel is to
Options- A. adjust the tyre pressure
- B. rotate the tyres
- C. adjust the damper spring tension
- D. attach appropriate weights to the wheel at appropriate positions Discuss
- 10. The force, by which the body is attracted, towards the centre of the earth, is called
Options- A. impulsive force
- B. mass
- C. weight
- D. momentum Discuss
More questions
Correct Answer: VTn = C
Correct Answer: slush casting
Correct Answer: Yes
Correct Answer: circumferential tensile stress
Correct Answer: between 95 and 100%
Correct Answer: discharge nozzle
Correct Answer: 0.65 to 0.9
Correct Answer: decrease
Correct Answer: attach appropriate weights to the wheel at appropriate positions
Correct Answer: weight
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