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- Question
A closed system is one in which heat and work crosses the boundary of the system but the mass of the working substance does not crosses the boundary of the system.
Options- A. Yes
- B. No
- Correct Answer
- Yes
- 1. The abrasive recommended for grinding materials of high tensile strength is
Options- A. silicon carbide
- B. aluminium oxide
- C. sand stone
- D. diamond Discuss
- 2. The unit of Young's modulus is same as that of stress.
Options- A. True
- B. False Discuss
- 3. Glazing in grinding wheels can be decreased by
Options- A. using a harder wheel or by increasing the wheel speed
- B. using a softer wheel or by decreasing the wheel speed
- C. using a harder wheel or by decreasing the wheel speed
- D. using a softer wheel or by increasing the wheel speed Discuss
- 4. Threading is an operation of
Options- A. smoothing and squaring the surface around a hole
- B. sizing and finishing a small diameter hole
- C. producing a hole by removing metal along the circumference of a hollow cutting tool
- D. cutting helical grooves on the external cylindrical surface Discuss
- 5. Admirality gun metal contains
Options- A. 60% copper, 35% zinc and 5% manganese
- B. 76% copper, 20% silicon and 4% zinc
- C. 82% copper, 12% zinc and 6% manganese
- D. 88% copper, 10% tin and 2% zinc Discuss
- 6. A thin cylindrical shell of diameter (d), length (l) and thickness (t)is subjected to an internal pressure (p). The hoop stress in the shell is
Options- A. pd/t
- B. pd/2t
- C. pd/4t
- D. pd/6t Discuss
- 7. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum shear stress will be
Options- A. 400 MPa
- B. 500 MPa
- C. 900 MPa
- D. 1400 MPa Discuss
- 8. The path taken by intake air is
Options- A. carburettor (or throttle body) - air cleaner - intake manifold - intake ports - cylinders
- B. air cleaner - carburettor (or throttle body) -intake ports - intake manifold - cylinders
- C. air cleaner - intake manifold - carburettor (or throttle body) - intake ports - cylinders
- D. air cleaner - carburettor (or throttle body) - intake manifold - intake ports - cylinders Discuss
- 9. The angular velocity (in rad / s) of a body rotating at N revolutions per minute is
Options- A. ?N/60
- B. ?N/180
- C. 2?N/60
- D. 2?N/180 Discuss
- 10. Cut-off governing as compared to throttle governing is
Options- A. less efficient and less economical
- B. less efficient and more economical
- C. more efficient and less economical
- D. more efficient and more economical Discuss
More questions
Correct Answer: aluminium oxide
Correct Answer: True
Correct Answer: using a softer wheel or by decreasing the wheel speed
Correct Answer: cutting helical grooves on the external cylindrical surface
Correct Answer: 88% copper, 10% tin and 2% zinc
Correct Answer: pd/2t
Correct Answer: 500 MPa
Correct Answer: air cleaner - carburettor (or throttle body) - intake manifold - intake ports - cylinders
Correct Answer: 2?N/60
Correct Answer: more efficient and more economical
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