RRB JE 2015-26-09-2015-2 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-26-09-2015-2 RRB Questions

41.
In a bar chart the vertical axis represents
A.
Time
B.
Types of activities
C.
Number of labours
D.
Various activities of the project
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ANSWER :
D. Various activities of the project
42.
Initial setting time is maximum for
A.
Portland-Pozzolana cement
B.
Portland-Slag cement
C.
Low heat portland-pozzolana cement
D.
High strength portland cement
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ANSWER :
C. Low heat portland-pozzolana cement
43.
The viscosity of a gas
A.
Decreases with increase in temperature
B.
Increases with increase in temperature
C.
is independent of temperature
D.
is independent of pressure for very high pressure intensities
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ANSWER :
B. Increases with increase in temperature
44.
In an internal focussing type of telescope, the lens provided is
A.
Concave
B.
Convex
C.
Plano-convex
D.
Plano-concave
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ANSWER :
A. Concave
45.
Voids ratio of a soil mass can
A.
Never be greater than unity
B.
Be zero
C.
Take any value greater than zero
D.
Take values between 0 and 1 only
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ANSWER :
C. Take any value greater than zero
46.
The main ingredients of portland cement are
A.
Lime and silica
B.
Lime and alumina
C.
Silica and alumina
D.
Lime and iron
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ANSWER :
A. Lime and silica
47.
Which of the following devices should be used for accurate measurement of low D.C. voltage?
A.
Small range moving coil voltmeter
B.
D.C. potentiometer
C.
Small range thermocouple voltmeter
D.
Hot wire voltmeter
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ANSWER :
B. D.C. potentiometer
48.
A direct current can be measured by
A.
a D.C. potentiometer directly
B.
a D.C. potentiometer in conjunction with a standard resistance
C.
a D.C. potentiometer in conjunction with a volt ratio box
D.
a D.C. potentiometer in conjunction with volt ratio box and standard resistance
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ANSWER :
B. a D.C. potentiometer in conjunction with a standard resistance
49.
Basically a potentiometer is a device for
A.
comparing two voltages
B.
measuring a current
C.
comparing two currents
D.
measuring a voltage
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ANSWER :
A. comparing two voltages
50.
In order to achieve high accuracy, the slide wire of a potentiometer should be
A.
as long as possible
B.
as short as possible
C.
neither too small nor too large
D.
very thick
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ANSWER :
A. as long as possible