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- Question
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is
Options- A. 50
- B. 100
- C. 150
- D. 200
- Correct Answer
- 100
- 1. Slow speed of the spindle is necessary in
Options- A. thread cutting
- B. turning a work of larger diameter
- C. turning a hard or tough material
- D. all of these Discuss
- 2. A zinc diffusion process is called
Options- A. galvanising
- B. anodising
- C. parkerising
- D. sherardizing Discuss
- 3. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is
Options- A. 0.25 kW
- B. 0.75 kW
- C. 1.75 kW
- D. 3.75 kW Discuss
- 4. A simple turbo-jet engine is basically a gas turbine engine equipped with a propulsive nozzle and diffuser.
Options- A. Agree
- B. Disagree Discuss
- 5. A basic hole is one whose
Options- A. lower deviation is zero
- B. upper deviation is zero
- C. lower and upper deviations are zero
- D. none of these Discuss
- 6. The cutting fluid mostly used for machining steel is
Options- A. water
- B. soluble oil
- C. dry
- D. heavy oils Discuss
- 7. Which of the following iron exist between 910° C and 1403° C?
Options- A. ?-iron
- B. ?-iron
- C. ?-iron
- D. ?-iron Discuss
- 8. The loss of pressure head in case of laminar flow is proportional to
Options- A. velocity
- B. (velocity)2
- C. (velocity)3
- D. (velocity)4 Discuss
- 9. The refrigerant carbon dioxide is not widely used because of its __________ power require ments per tonne of refrigeration and high operating pressures.
Options- A. low
- B. high Discuss
- 10. Shrinkage allowance is made by adding to external dimensions and subtracting from internal dimensions.
Options- A. Agree
- B. Disagree Discuss
More questions
Correct Answer: all of these
Correct Answer: sherardizing
Correct Answer: 1.75 kW
Correct Answer: Agree
Correct Answer: lower deviation is zero
Correct Answer: soluble oil
Correct Answer: ?-iron
Correct Answer: velocity
Correct Answer: high
Correct Answer: Agree
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