Test Quiz Mechanical Engineering - Set 21


1. 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.
True
False

2. The entropy of the universe is continually on the increase.
Correct
Incorrect

3. The angle which the normal reaction makes with the resultant reaction is called angle of friction.
Disagree
Agree

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

5. An ignition coil in the spark ignition engines supplies ________ voltage to the spark plug.
High
Low

6. The moment of inertia of a square of side a about its base is a4/3
False
True

7. Both the Ericsson and Joule's cycle have two constant pressure processes.
True
False

8. The maximum displacement of a body, from its mean position is called amplitude.
True
False

9. The ideal efficiency of simple gas turbine cycle depends upon pressure ratio.
Yes
No

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

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

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.
True
False

13. The path of the projectile is a parabola.
True
False

14. The friction experienced by a body, when at rest, is known as static friction.
Yes
No

15. Gas turbine cycle consists of
2 isentropic and 2 constant volumes
2 isentropic and 2 constant pressures

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

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.
More than
Less than

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.
Lower
Higher

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

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

     Score =

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