Mechanical Engineering Quiz 18
1 / 50
The diameter of fire tubes in Cochran boiler is of the order of___________________?
2 / 50
The maximum number of jets generally employed in impulse turbine without jet interference is________________?
3 / 50
If three forces acting in different planes can be represented by a triangle, these will be in________________?
4 / 50
In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?
5 / 50
Proximate analysis of fuel is determination of percentage of ____________________?
6 / 50
According to Kirchoff?s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a _________________?
7 / 50
In the axial flow gas turbine, the work ratio is the ratio of____________________?
8 / 50
Liquids_________________?
9 / 50
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is____________________?
10 / 50
Air vessels in reciprocating pump are used to__________________?
11 / 50
Secondary air is the used to_________________?
12 / 50
Vacuum for reciprocating steam engines compared to steam turbines is__________________?
13 / 50
In hydrodynamic bearings_____________________?
14 / 50
In boiling water reactor, moderator is__________________?
15 / 50
Which one of the following metals would work-harden more quickly than the others__________________?
16 / 50
A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?
17 / 50
Presence of moisture in fuel oil would____________________?
18 / 50
A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?
19 / 50
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as ________________?
20 / 50
Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows ________________?
21 / 50
Young?s modulus is defined as the ratio of ___________________?
22 / 50
Tensile strength of steel can be safely in-creased by________________?
23 / 50
Melting point of iron is__________________?
24 / 50
Water tube boilers are those in which________________?
25 / 50
With increase in engine speed, the ignition of spark in petrol engine has to be __________________?
26 / 50
According to first law of thermodynamics_______________________?
27 / 50
Resistance to fatigue of a material is measured by________________?
28 / 50
Fuel consumption of diesef engines is not guaranteed at one quarter load because at such low loads________________?
29 / 50
The saturation temperature of steam with increase in pressure increases____________________?
30 / 50
Electron-volt is the unit of________________?
31 / 50
Hydrogen is preferred as better coolant in comparison to C02 because former_____________________?
32 / 50
The capillary rise at 20?C in a clean glass tube of 1 mm bore containing water is approximately____________________?
33 / 50
The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to___________________?
34 / 50
The ratio of heat utilised to produce steam and the heat liberated in furnace is known as___________________?
35 / 50
Lancing is the operation of _________________?
36 / 50
The total energy of each particle at various places in the case of perfect incompres sible fluid flowing in continuous sream__________________?
37 / 50
The atmospheric pressure with rise in altitude decreases__________________?
38 / 50
If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella___________________?
39 / 50
Turbo propeller has the following additional feature over the turbojet __________________?
40 / 50
Residual stress in materials_________________?
41 / 50
Supercharging is essential in_____________?
42 / 50
The coal requirement per kW hour generation in the thermal power plant is of the order of__________________?
43 / 50
The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as________________?
44 / 50
Super conduction by metals is observed in the temperature range of_________________?
45 / 50
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of___________________?
46 / 50
Work done in an adiabatic process between a given pair of end states depends on__________________?
47 / 50
What does symbol ?O? imply in work study________________?
48 / 50
Work done in a free expansion process is___________________?
49 / 50
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases ____________________ ?
50 / 50
Zeroth law of thermodynamics________________?
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