Skip to main content

Mechanical Engineering Review Questions: Power Elements Part 2

Here’s the second part of the questions on Power Plant and Industrial Plant Engineering terminologies.

1. A reserve generating capacity that is in operation but not in service.
a. Hot reserve
b. Firm power
c. Prime power
d. Spinning reserve

2. Another term for Lower Heating Value (LHV).
a. Gross Calorific Value
b. Least Calorific Value
c. Net Calorific Value
d. Actual Calorific Value

3. In a refrigeration system, it controls the flow of refrigerant manually.
a. Float Valve
b. Capillary tube
c. Gate Valve
d. Expansion valve

4. The ratio of the dynamic depression head to the total head of a pump.
a. Cavitation factor
b. Load factor
c. Draw down
d. Static suction lift

5. A device used to determine the water level in the boiler.
a. Fusible plug
b. hydrometer
c. Bourdon gage
d. Gauge cock

6. A device in the fuel system that mixes gasoline with air.
a. Carburetor
b. Condenser
c. Injection pump
d. Piston

7. Comparing Diesel and Gasoline engines, which of the following is true?
a. Operating temperature of Gasoline Engines are higher
b. Additive lube oils should not be used in Gasoline engines
c. Soot production in Diesel engines are lesser
d. Operating temperature of Diesel Engines are higher

8. Which of the following is true in pH value?
a. pH value has no relationship with the Hydrogen-ion concentration
b. pH value of 5-6 are usually kept in boiler waters
c. pH 7 represents neutral value
d. pH value is not an important consideration in boiler operation

9. Reversible adiabatic expansion is at constant…
a. Temperature
b. Pressure
c. Entropy
d. Volume

10. The temperature at which vapor starts forming above the surface of liquid fuels.
a. Pour point
b. Flash point
c. Fire point
d. Kindling point

Answer will be posted after 2 days.


  1. hii cant find the answer of this questions. in your blog "Mechanical Engineering Review Questions: Power Elements Part 2"

  2. hello, can you provide an answer for this power element question part 2? thanks

  3. ang galing nman ng gumawa nito... thank you...


Post a Comment

Popular posts from this blog

PAST MECHANICAL BOARD EXAM QUESTION: Machine Design Set-1 (solutions and answers)

The following are the solutions and answers to MODIFIED PAST MECHANICAL BOARD EXAM QUESTION: Machine Design Set-1 posted on this blog last Saturday, November 14, 2009. Again, I want to stress out that most of the questions here are modified from its original form for the purpose of improving the question. Past Mechanical Engineering Board Exam Question Number 1 A 4 inches diameter short shaft carrying 2 pulleys close to the bearings transmits how much horsepower if the shaft makes 120 rpm. A.200HP               B. 199 HP C.198 HP               D. 202 HP P = (D3N )/38 -- for mula for short shafts from PSME code P = (4)3(120)/38 P= 202 HP Past Mechanical Engineering Board Exam Question Number 2 An instrument that measures the hardness of the work piece in terms of elasticity. a. Durometer b. Scleroscope c. Mohs's Scale d. Brinell Tester Source: Machinery’s Handbook


Here are the solutions to board problems given at Power Subject Set-1. If you do not understand anything, feel free to write a comment voicing out your concern. I'm still looking for better ways to present my solution. I still don't know how to present equations and mathematical symbols with blogger. Please bear with me. 1. An automobile tire is inflated to 32psig pressure at 50 degree F. After being driven, the temperature rises to 75 degree F. Determine the final gage pressure assuming the volume remains constant. (Electrical Engineering Board Exam Problem) Solution: Since volume is constant, use Charles’ Law on constant volume processes. P1/T1=P2/T2 Note: P and T should be absolute. (32+14.7)/ (50+460) =P2/ (75+460) P2=48.99 psia Converting back to gage pressure, P2g=48.99-14.7 P2g=34.29 psig 2. Four hundred cubic centimeters of gas at a pressure of 740 mmHg absolute and temperature of 18 degree C undergoes a process until the pressure and temperature be

BOARD EXAM TIP: Which Review Center?

First of all, I would like to apologize for a long time I haven't posted anything but introduction. The reason for that is I'm busy optimizing the design of this site. I'm hoping that the make over is good. Anyway, I would like to dedicate this article to those who are going to take/retake the board exam this coming October. My sincere wish that you bring out the best among yourselves and may the deserving ones pass the exam. Going back to the One-Million-Peso worth question: "Which review center should I enroll?" , I would like to answer that in the most unbiased way I can. Of course, I'm only human and I had also my preferences but I will try my best to hide it. To start with I will enumerate some of the prominent review centers that offer board exam reviews for mechanical engineering in the Philippines. 1. Alcorcon (Cebu & Manila) 2. Excel (Cebu & Manila) 3. Linx Engineering (Manila) 4. MERIT (Manila) 5. PRIME (Cebu) 6. RLB's