RRB JE 2015-26-09-2015-3 RRB Question Paper

RRB JE 2015 Question Papers

RRB JE 2015-26-09-2015-3 RRB Questions

11.
A grinding wheel of 150 mm diameter is rotating at 3000 rpm. The grinding speed is
A.
7.5π m/sec
B.
15π m/sec
C.
45π m/sec
D.
450π m/sec
😑 View Answer Rough Work
ANSWER :
A. 7.5π m/sec
12.
In Die casting, machining allowance is
A.
Small
B.
Large
C.
Very large
D.
Not provided
😑 View Answer Rough Work
ANSWER :
D. Not provided
13.
The grinding operation is a
A.
Shaping operation
B.
Forming operation
C.
Surface finishing operation
D.
Dressing operation
😑 View Answer Rough Work
ANSWER :
C. Surface finishing operation
14.
The process in which leaving a tab without removing any material is
A.
Notching
B.
Lancing
C.
Parting
D.
Sliting
😑 View Answer Rough Work
ANSWER :
B. Lancing
15.
Steel rails are welded by
A.
Gas welding
B.
Thermit welding
C.
Resistance welding
D.
Argon arc welding
😑 View Answer Rough Work
ANSWER :
B. Thermit welding
16.
D.C. generator works on the principle of
A.
Electromagnetic Induction
B.
Ohm's Law
C.
Lenz's Law
D.
Kirchoff's Law
😑 View Answer Rough Work
ANSWER :
A. Electromagnetic Induction
17.
Thermal relays are used in
A.
motor starters
B.
switchgear protection
C.
transformer protection
D.
generators
😑 View Answer Rough Work
ANSWER :
A. motor starters
18.
The most commonly used moderator in a Nuclear reactor is
A.
graphite
B.
oil
C.
oxygen
D.
heavy water
😑 View Answer Rough Work
ANSWER :
D. heavy water
19.
Over speed protection of a generator is done by
A.
Governor
B.
Differential protection
C.
Over current relay
D.
Alarm
😑 View Answer Rough Work
ANSWER :
A. Governor
20.
The motor which does not have winding on it, is
A.
Repulsion
B.
Reluctance
C.
Hysterisis
D.
Universal
😑 View Answer Rough Work
ANSWER :
C. Hysterisis