681.
The function of steam stop valve is
A
TO regulate flow Of steam from boiler to steam pipe
B
TO separate steam from water
C
TO collect steam from drum
D
TO provide safety of boiler
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The function of steam stop valve is
TO regulate flow Of steam from boiler to steam pipe
TO separate steam from water
TO collect steam from drum
TO provide safety of boiler
The function of ozone layer is
protects the earth from harmful effect of ultraviolet rays
increase the temperature of earth
increases in atmosphere
none of the above
The function of boiler is
To compressed steam
To generate steam at a desired pressure
To heat feed water
To blow out hot gases.
The following is the one of the characteristics of I.C. engine
Large in size
Cheaper fuel may be used
Starting is difficult
More efficient
The correct location of economizer is :
Between furnace and preheater
between forced draft fan and furnace
between airpreheater and chimney
near the superheater
The compression ratio for the diesel engine is approximately in the following range
5:1 to 10:1
11:1 to 20:1
12:1 to 15:1
10:1 to 12:1
The clutch ordinarily remains in disengaged condition when it is used for power transmission in:
Automobile
Machine tools
Crane
Elevator
The clearance volume in a compressor is provided
To increase volumetric efficiency
to reduce the work input
So that piston does no strike the cylinder head
To accommodate valves in the cylinder
The cam shaft speed of four stroke engine is
Double than crank shaft speed
Four times of crank shaft speed
Equal to crank shaft speed
Half of crank shaft speed
The air standard cycle on which the petrol engine work is
Otto cycle
Carrot cycle
Joule cycle
Dual cycle
The ability of a material to resist fracture due to high impact loads is called
strength
stiffness
toughness
brittleness
Specific heat is defined as the amount of heat required
To raise unit of temp of a substance
To raise unit mass of substance through unit degree of temperature
To raise unit mass of substance through 100 C
None of this
Saturation temperature of steam increase
With decrease in pressure
with increase in pressure
is unaffected by pressure
none of the above
Reducing pressure angle on gears results in
Weaker teeth
Stronger teeth
High velocity ratio
High efficiency
Pump is a machine which is used to do
lift liquid from low height to higher elevation
To store liquid
To compress liquid
none of the above
Petroleum is
Solid fuel
Liquid fuel
Secondary fuel
None of this
Natural fuel is
That occur in nature
Known as secondary fuel
Prepared fuel
None of the above
Main disadvantage of nuclear energy is
High operating cost
Low efficiency
Waste disposal
All of above
In the Polytropic Process PVn= C, if n = infinity , the process is called
isochoric
isobaric
isothermal
adiabatic
In S.I. unit for the force is.
Kgm
Kgf
Newton
Lb