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mmup mechanical questions 03

MECHANICAL ENGINEERING QUESTIONS


How much time required for trained personnel to identify fire alarm, to evaluate and reset the condition back to normal
3 hour
1 hour
30 minutes
3 minutes
ANS: d
In a power plant cycle, if efficiency of turbine ( = 80 %) and efficiency of generator(=90%), then overall efficiency is
170%
100%
72%
10%
ANS: c
During a project phase, Change order (change request) means
Change in scope
Change in cost
Change in Time
Change in any work
ANS: d
During which of the below process, status reports, change request, forecasts created
Estimation
Planning
Initiation
execution
ANS: d
According to Brundtland Commission in 1987 report,  the Three pillars of sustainability and sustainability development are
Economic, environmental, cultural
Economic, environmental, social
Political, economic, environment
Cultural, political, social
ANS: b
Below change is least bothered  during project phase
Scope
Time
People, performance
Cost
ANS: c ( because Scope, time and Time are triple constraints from project point of view. Resource, performance, etc are least effective)
When boiling water in open pan, which is constant
a). temperature is constant
b). pressure is constant
c). volume is constant
d) All above
ANS: a. temperature is constant at boiling point.
If calorific value of fuel needs to be high,
Water vapor condensed initially when fuel burns
Water vapor condensed later when fuel burns
Water vapor is not formed while fuel burns
 Water vapor is formed
ANS: c
If water vapor leaves at the eye of centrifugal pump, it is called
water hammer
cavitation
boiling
All the above
ANS: b
 When three phases of fluid co-exist at
Saturation point
Triple point
Critical point
Freezing point
ANS: b
COP (coefficient of performance) of refrigeration system defined as below
Compressor output to compressor input
Compressor input to compressor output
Cooling load output to compressor input
Compressor input to cooling load output
ANS: c
In a vapor compression refrigeration cycle, if super heating value increased and condensate value decreased,
COP increase
COP decrease
ANS: a
Inspection Frequency of smoke detector in accordance with NFPA72
Weekly
Semi-annually
Annually
Daily
ANS: b
classification of alarm system as per NFPA72
public and private
supervising station fire alarm system
protected premises fire alarm system
all the above
ANS:
Operating mode of alarm system
Public and private
Day and night
12 hour and 24 hour
All the above
ANS:
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