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IC Engine Practice Test: Measurements and Testing/Performance Parameters and Characteristics
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Measurements and Testing/Performance Parameters and Characteristics topics include: Measurment and testing, engine power and efficiencies, engine performance and characteristics.
Engine performance parameters are power, torque and specific fuel consumption. Brake torque is normally measured with a dynamometer – engine is mounted on a test bed and the shaft is connected to the dynamometer rotor.

Engine performance is often characterized by the engine operating behavior in the speed–load domain, for example, the behavior of emissions, fuel consumption, noise, mechanical and thermal loading.  

IC Engine Practice Test: Measurements and Testing/Performance Parameters and Characteristics
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25 Questions

1. The power developed by an engine at the output shaft is called ____________
2. ____________ is the method of governing used in petrol engine.
3. The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called ______________
4. The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.
5. For which of the following engines a prony brake is used to measure brake power?
6. ____________ is the ability of a measuring device to reproduce output readings when the same measurand value is applied to it repeatedly under the same environmental conditions and in the same direction.
7. ____________ is the magnitude of discernible or detectable output changes as the measurand is continuously varied over the range.
8. ____________ is the algebraic difference between the maximum and minimum limits of the range.
9. The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called ______________
10. ____________ is used to check the state of charge of a battery.
11. What are the basic measurement and testing parameters?
12. The density of the fuel is dependent on temperature which can vary a wide range from ___________
13. What does scavenging air mean?
14. The frictional power (F.P) is given by ____________
15. The brake power of a diesel engine, keeping other parameters constant, can be increased by ______________
16. The degree of reproducibility among several independent measurements of the same true value under reference conditions is?
17. Automobile gears are generally made of ______________
18. A 4-cylinder four stroke petrol engine develops 14.7 KW at 1000 r.p.m. The mean effective pressure is 5.5 bar. Calculate the bore and stroke of the engine, if the length of stroke is 1.5 times the bore.
19. A single cylinder, four stroke cycle oil engine is fitted with a rope brake. The diameter of the brake wheel is 600 mm and the rope diameter is 26 mm. The dead load on the brake is 200 N and the spring balance reads 30 N. If the engine runs at 450 r.p.m., what will be the brake power of the engine?
20. What are the basic measurement and testing parameters?
21. Hunting occurs due to which of the following?
22. The hypothetical pressure which is thought to be acting on the piston throughout the power stroke is called ____________
23. The ratio of the heat equivalent to one kW hour to the heat in fuel per B.P. hour is termed as brake thermal efficiency.
24. ____________ is a measure of the probability that a measuring device will continue to perform within specified limits of error over a specified length of time under specified conditions.
25. What are the types of absorption dynamo meters?

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