Test Quiz Mechanical Engineering - Set 21 - ObjectiveBooks

# Quiz Questions

01. A nozzle is said to be a convergent-divergent nozzle, when the cross-section of a nozzle first decreases from its entrance to throat and then increases from its throat to exit.

02. The entropy of the universe is continually on the increase.

03. The angle which the normal reaction makes with the resultant reaction is called angle of friction.

04. The spigot and socket joint is mostly used for pipes which are buried in the earth.

05. An ignition coil in the spark ignition engines supplies ________ voltage to the spark plug.

06. The moment of inertia of a square of side a about its base is a^4/ 3.

07. Both the Ericsson and Joule's cycle have two constant pressure processes.

08. The maximum displacement of a body, from its mean position is called amplitude.

09. The ideal efficiency of simple gas turbine cycle depends upon pressure ratio.

10. Vectors method for the resultant force is also called polygon law of forces.

11. Cold working requires much higher pressure that hot working.

12. The stage efficiency is the ratio of energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam.

13. The path of the projectile is a parabola.

14. The friction experienced by a body, when at rest, is known as static friction.

15. Gas turbine cycle consists of

16. The punch and die set up is ________ for punching and piercing operation.

17. According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end free is __________ the crippling load for a similar column hinged at both the ends.

18. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in ________ power per tonne of refrigeration.

19. The compressive strength of brittle materials is __________ its tensile strength.

20. Which of the following refrigerant has the lowest boiling point?

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