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問題一覧
1
In a four stroke Diesel engine, drawing air into the cylinder is what stroke ?
a. First Stroke
2
Increasing the total amount of changing air in the working cylinder of the engine.
b. Supercharging
3
Rings located in the grooves of the piston usually near the top and near the bottom
b. Piston Ring
4
The portion of the piston which extends below the piston pin and serves as a guide for the piston and connecting rod.
a. Piston Skirt
5
An engine in which the fuel is burned directly within the working cylinder.
a. Internal Combustion Engine
6
What type of gas turbine is used in aircraft?
a. Open cycle type
7
Which of the following compressors is generally used for gas turbines ?
c. Axial Flow Type
8
Overall efficiency of a gas turbine is _______.
c. Less than Diesel efficiency
9
Which curve represents the average of daily load curves over a one-month period and is used for rate establishment?
c. Monthly Load Curve
10
What is the " Maximum Demand " often referred to as ?
b. Peak Load
11
What is the purpose of a Load-Duration Curve ?
b. To rearrange data from a chronological load curve
12
What does " Demand Factor " measure ?
a. The ratio of connected load to maximum demand
13
What is the " Diversity Factor " in electrical systems ?
c. The ratio of individual maximum demands to simultaneous maximum demand.
14
What is " Base Load " in the context of electrical systems ?
b. The minimum load over a given period
15
A simultaneous generation of electricity and steam (or heat) in a single power plant:
D. Cogeneration
16
What is the clockwork-operated device which records continuously the humidity of the atmosphere?
D. Hygrograph
17
A Francis turbine has what flow:
A. Inward flow reaction
18
A type of water turbine:
C. Pelton
19
If the pressure of the confined gas is constant, the volume is directly proportional to the absolute temperature:
B. Joule
20
Pump used to increase air pressure above normal, air is then used as a motive power:
B. Air compressor
21
The locus of elevations:
B. Hydraulic gradient
22
The dividing point between the high pressure and low pressure sides of the refrigeration cycle occurs at the:
A. Expansion valve
23
Type of turbine that has high pressure and low pressure is called:
D. Compound turbine
24
Heat exchanger used to provide heat transfer between the exhaust gases and the air prior to its entrance to the combustor.
C. Regenerator
25
S.I unit of force:
B. Newton
26
Heat transfer due to density differential:
A. Convection
27
If the fluid travels parallel to the adjacent layers and paths of individual particles do not cross, the flow is said to be:
D. Laminar
28
At any instant, the number of particles passing every cross-section of the stream is the same, the flow is said to be:
A. Steady flow
29
The intake pipe to a hydraulic turbine from a dam is:
D. Penstock
30
Scavenging efficiency of a four stroke diesel engine is:
D. Between 95 % and 100 %
31
Flash point of liquids is the temperature at which:
A. The fuel emits vapors at a rate which produces an inflammable mixture with air
32
Flash point for diesel fuel oil should be:
A. Maximum 49°C
33
Air standard efficiency of a diesel engine depends on:
B. Compression ratio
34
What amount of air is required in a low bypass factor?
B. Lesser
35
The term "exposure" in radiological effects is used as a measure of a Gamma ray or an X-ray field in the surface of an exposed object. Since this radiation produces ionization of the air surrounding the object, the exposure is obtained as:
A. x = no. of ions produced per mass of air x per coulombs per kg
36
The design of an air supply duct of an air conditioning system:
D. Affects the distribution of air
37
The energy of fluid flowing at any section in a pipeline is a function of:
C. Height above a chosen datum, density, internal energy, pressure and velocity od flow
38
Ignition of the air fuel mixture in the intake of the exhaust manifold:
B. Backfire
39
A theoretical body which when heated to incandescence would emit a continuous light-ray spectrum:
B. Black body
40
The ratio of the average load to the peak load over a designated period of time is called:
A. Load factor
41
The ratio of the sum of individual maximum demands of the system to the overall maximum demand of the whole system:
A. Demand factor
42
Heavy water is:
D. D₂O
43
The hydraulic formula CA is use to find:
A. Quantity of discharge through an orifice
44
If the temperature is held constant and the pressure is increased beyond the saturation pressure, we have a:
C. Compressed liquid
45
Which of the following a set of standard condition:
B. 101.325, 273⁰k, 22.4 m³/kg mole
46
In sensible cooling process, the moisture content:
A. Does not change
47
The internal combustion engines never work on________ cycle:
A. Rankine
48
The locus of elevation to which water will rise in the piezometer tube is termed:
C. Hydraulic gradient
49
When four events takes place in one revolution of a crankshaft of an engine, the engine is called:
C. Two stroke engine
50
Which of the following does not belong to the group?
C. Time injection system