Mechanical Engineering Quiz 38
1 / 50
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________?
2 / 50
The crown of the fire box is made hemispherical in order to___________________?
3 / 50
All radiations in a black body are___________________?
4 / 50
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to___________________?
5 / 50
The center of gravity of a triangle lies at the point of __________________?
6 / 50
Phenomenon of choking in compressor means __________________?
7 / 50
Which of the following has least value of conductivity_________________?
8 / 50
When a body floating in a liquid, is displaced slightly, it oscillates about _________________?
9 / 50
Which of the following laws is applicable for the behavior of a perfect gas__________________?
10 / 50
Fuel oil consumption guarantees for I C engine are usually based on__________________?
11 / 50
Chilled cast iron has____________________?
12 / 50
Isotopes of same elements have___________________?
13 / 50
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?
14 / 50
Which of the following pipe joints would be suitable for pipes carrying steam_____________?
15 / 50
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?
16 / 50
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?
17 / 50
The lenght of Cornish boiler is of the order of _________________?
18 / 50
Air refrigeration cycle is used in ____________________?
19 / 50
Poise is the unit of________________?
20 / 50
Which one of the following represents a group incentive plan ?
21 / 50
The moment on the pulley which produces rotation is called ___________________?
22 / 50
The number of electrons in 1 cm3 of metal would be of the order of_______________?
23 / 50
Relationship between the number of links (L) and number of pairs (P) is___________________?
24 / 50
Which of the following cycles is not a reversible cycle_____________________?
25 / 50
Isothermal compression effeicency can be attained by running the compressor__________________?
26 / 50
Reheating of steam under ideal conditions takes place at constant __________________?
27 / 50
Diesel engines have low specific fuel consumption compared to petrol engine. This statement is____________________?
28 / 50
Calorie is a measure of
29 / 50
Freon group of refrigerants are___________________?
30 / 50
Leakage past the piston rings and valve seats in I.C engines with increase in speed_______________?
31 / 50
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is_________________?
32 / 50
Steam in water tube boiler as compared to fire tube boiler_________________?
33 / 50
The flow in which each liquid particle has a definite path and their paths do not cross each other is called__________________?
34 / 50
If n = number of members andy = number of joints, then for a perfect frame, n =_________________?
35 / 50
In queuing theory, the nature of the waiting situation can be studied and analysed mathematically if_________________?
36 / 50
The first unclear power plant in India is located at____________________?
37 / 50
The value of Poisson?s ratio for cast iron is_________________?
38 / 50
For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?
39 / 50
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?
40 / 50
The bulk modulus of elasticity with increase in pressure__________________?
41 / 50
The impact strength of a material is an index of its ___________________?
42 / 50
The reason for supercharging in any engine is to________________?
43 / 50
The effective power of gas turbines is increased by adding the following in compressor__________________?
44 / 50
Which of the following mechanisms produces mathematically an exact straight line motion____________________?
45 / 50
Frederick W. Taylor introduced a system of working known as________________?
46 / 50
Free cutting steels_____________________?
47 / 50
Choose the wrong statement ?
48 / 50
Short horizontal lines on pressure-enthalpy chart show__________________?
49 / 50
The probability distribution of activity times in PERT follows following distribution__________________?
50 / 50
Film coefficient is defined as Inside diameter of tube________________?
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