Power Engineering 5th Class QNS
An agency or code with which fittings must comply is:
Choose one answer.
a. Health and Safety Code
b. Fittings and Boiler Parts Act
c. Boiler Repair Code
d. Plumbing Gas Act
e. ASME Code - ANS e
Hot water heating boilers have stop valves in...
The boilers and pressure vessels act was put into place to protect:
a) contractors
b)owners
c)employers
d)employees
e) the public - ANS e
Which of the following codes have the Canadian jurisdictions adopted in reference to
pressure vessel regulation?
a)CBT V33
b)CBT V62
c)CSA B51
d)CSA B52
e)CSA B31 - ANS c
If a piping system design is approved, a piping number is stamped on the design, such
as PP-455-E-03-P. The last P in this number would indicate:
a) the plant owner
b) the type of plant
c) the inspection district
d) the number of the plant
e) that the design is a pressure piping design - ANS b
The chief boiler inspectors have established ____________, in which most provinces
participate:
a) codes
b) acts
c) regulations
d) inspections
e)a system of standardised exams - ANS e
CSA B51 Code was produced to cover:
a) refrigeration plants
b) fish packing plants
c) natural gas piping
d) all aspects of a power plant
e) boilers and pressure piping - ANS e
CSA B51 Appendix E covers which of the following sections?
a) Quality assurance programmes
,b) Sample forms
c) Burial of pressure vessels
d) Guidelines for safety/relief valves
e) Inspection of wells in pressure coils - ANS b
CSA B52 Code was produced to cover:
a) refrigeration plants
b) heating plants
c) gas plants
d)natural gas plants
e)boiler and pressure piping - ANS a
Which of the following ASME Codes is used by an operator to care for and operate a
low pressure boiler correctly?
a) Section II
b) Section IV
c) Section VI
d) Section IX
e) Section XI - ANS c
What is the surface area of a cylinder with a diameter of 4 cm and height of 6 cm?
(include the areas of the ends)
a)75.4 cm2
b)25.1 cm2
c) 100.5cm2
d)88.0cm2
e)1892.5cm2 - ANS c
10. What is the volume of a cylinder with a diameter of 9 cm and a height of 15 cm?
a)106.0cm3
b)3817.0cm3
c)238.6cm3
d) 954.3cm3
e)1590.4 cm3 - ANS d
Find the surface area of a sphere with a radius of 3 m.
a)452.2 m2
b)28.26 m2
c)37.68 m2
d)7.1 m2
,e)113.1 m2 - ANS e
Which of the following equations correctly expresses the volume of a hemisphere?
a) V = (4 π r3 ) / 3
b) V/2 = (4 π r3 ) / 3
c) V = (2 π r3 ) / 3
d)V = (4π r3/2 ) / 3
e)V/2 =(2/3) π r2 - ANS e
A pressure vessel is in the form of a cylinder with each end in the form of a hemisphere.
The vessel operates at 1100 kPa. If the overall length is 12 m and the diameter is 3 m,
what is the volume of the pressure vessel?
a)77.79 m3
b)113.1 m3
c)91.9 m3
d)94.2 m3
e)84.8 m3 - ANS d
What is the surface area of a pressure vessel in the form of a cylinder with each end in
the form of a hemisphere, if the overall length is 12 m and the diameter is 3 m?
a) 113.1 m2
b) 141.3 m2
c) 84.82 m2
d) 98.9 m2
e) 106.3 m2 - ANS d
Which of the following statements about simple machines is false?
a) The machine receives energy by means of a single applied force
b) the machine produces work by means of a single output force
c) Work output is the product of the load and the distance moved by the load
d) Work input is greater than work output
e)The machine receives energy by means of 2 or more applied forces - ANS a
A massless bar is 4.6 m long with a pivot (fulcrum) 1.6 m from the right end. A 41 kg
mass is placed at the left end, 3.0 m from the fulcrum. Calculate the force (in Newtons)
that must be placed at the right end (1.6 m from the fulcrum) so that system is balanced.
a)754.14 N
b)76.88 N
c)27.50 N
d)123 N
, e)1206.63 N - ANS a
An effort of 3 kN is required to move a mass of 2000 kg in a certain simple machine. If
the mass is raised 1.5 m while the effort moves 12 m, find the velocity ratio (VR), the
actual mechanical advantage (MA), and the efficiency (Eff) of the machine.
a) VR = 8, MA = 0.67, Eff = 5.3%
b) VR = 12, MA = 6.54, Eff = 54.4%
c) VR = 8, MA = 0.67, Eff = 8.3%
d) VR = 8, MA = 6.54, Eff = 81.8%
e) VR = 1.5, MA = 0.67, Eff = 44.7% - ANS d
A block and tackle system has 3 pulleys in each of two blocks. If a downward effort of
100 N is applied and the machine has an efficiency of 83.6%, what is the maximum
mass that can be moved?
a)501.6 kg
b)51.1 kg
c)5113.1 kg
d)250 kg
e)25.6 kg - ANS b
Which of the following statements about incline planes is false?
a) A ramp is an incline plane?
b) Work input = work output + work wasted
c) A screw is an incline plane
d) Work is wasted in friction
e) No work is wasted in producing heat - ANS e
Which of the following examples is not an example of a dynamic body?
a) a body that is accelerating
b) a body that is decelerating
c) a body that is orbiting at a constant speed around a planet
d) a body moving at a uniform velocity along a straight line
e)a body colliding with another body and deflecting in a new direction - ANS e
The rate of change of velocity is:
a)mass
b)force
c)acceleration
d)weight
e)displacement - ANS c
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