answers latest update
1. When the downward force at C2 is 100 lb and D2 = 2.5 inches, the upward force at C1 will
be ________lb if D1 = 4 inches.
A. 160
B. 256
C. 384
D. 240 - CORRECT ANSWER-A. 160
x/12.56 sq in = 100 lbs/7.85 sq in
x = (100lbs/7.85 sq in)12.56
x = 160 lbs
2. Add the following decimals and express the answer to three decimal places. 0.4789 + 3.125 +
9.656
A. 13.26
B. 13.3
C. 13.259
D. 13.2599 - CORRECT ANSWER-C. 13.259
3. What are common materials used as electrical conductors?
A. Silver, copper, aluminum
B. Copper, glass, lead
C. Mica, rubber, titanium
D. Gold, copper, mica - CORRECT ANSWER-A. Silver, copper, aluminum
4. Large impulse turbines will use what of rotor?
A. Build-up rotors.
B. Solid rotors
C. Combination of solid and build-up rotors
D. All of the above - CORRECT ANSWER-D. All of the above
5. The most effect purging medium to use when dealing with iron sulphide is:
A. air
B. carbon dioxide
C. nitrogen
D. water - CORRECT ANSWER-D. water
, 6. The shape of a ball bearing is ______ when a load is applied to the ball.
A. elliptical
B. circular
C. rectangle
D. radial
E. trapezoid - CORRECT ANSWER-A. elliptical
7. Which of the following is a typical 4000 hour inspection duty with compressors?
A. Service the crankcase breather
B. Take oil samples
C. Recalibrate all temperature and pressure gauges
D. Check gas discharge and inlet temperatures - CORRECT ANSWER-A. Service the
crankcase breather
8. What does the term nominal filter refer to?
A. A ratio of large to small particles found in a test run.
B. The largest particle that will pass
through the filter under specific test conditions
C. The length of time a filter is functional based on particle tests.
D. That a stated percentage of a certain size particle will be stopped - CORRECT ANSWER-D.
That a stated percentage of a certain size particle will be stopped
9. Which of the following best defines a breaker fabric?
A. An open mesh used to reinforce against longitudinal breaking under impact
B. A single layer of fabric that provides load support
C. The traverse yarns that run perpendicular to the warp yarns
D. Yarns in the fabric that provide the tension strength
E. An extra layer of rubber compound that protects against separation - CORRECT ANSWER-
A. An open mesh used to reinforce against longitudinal breaking under impact
10. Regulators are classified as to their:
A. stage and type
B. weight and size
C. service and type
D. color and size - CORRECT ANSWER-C. service and type
11. Ropes made of synthetic fibre are stronger than those made of natural fibres.
A. False
B. True - CORRECT ANSWER-B. True
12. Which of the following is an application for a hydrodynamic bearing system?
A. Steam turbines
B. Large radio telescopes whose journals operate at slow speeds
C. Large electric motors