| Post Name | Junior Instructor-Lift and Escalator Mechanic-Industrial Training Department |
|---|---|
| Question Paper Code | 003/2020/OL |
| Category Code | 095/2018 |
| Date of Test | 22 January 2020 |
| Medium of Question | ENGLISH |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
The tool used for marking and testing of angles 90Β°
Answer
A. Try-square
2
Why rotatable bevels are used in dial indicator
Answer
D. For making final zero setting
3
The connection link used to make a connection between sling and load to be lifted is
Answer
B. Shackle
4
Rivet used for structural application is
Answer
B. Snap head
5
The arc used in Electric Arc welding is
Answer
A. Low voltage high current
6
The flux used in brazing
Answer
B. Borax
7
How many types of foundations are there based on depth?
Answer
D. 2
8
Size of a wire rope specified by its.
Answer
A. Nominal diameter
9
A hacksaw blade specified by its.
Answer
A. Length
10
Which of the following is a solid lubricant?
Answer
C. Graphite
11
While chipping the slag or grinding which is used to protect eyes.
Answer
D. Goggles
12
In which of the following drives there is no slip.
Answer
D. Chain drive
13
The point angle of centre punch is.
Answer
C. 90Β°
14
The welding process that uses non-consumable electrode is
Answer
A. TIG welding
15
Washer is used to
Answer
B. Provide bearing area
16
A flange coupling is used to connect two shafts
Answer
A. Perfectly aligned
17
What does COP stand for?
Answer
A. Car Operating Pannel
18
What is the purpose of counter weight?
Answer
B. Balance the weight of car
19
The device designed to stop a descending car or counter weight beyond its normal limit.
Answer
C. Buffer
20
The elevator car is suspended on the main rope by means of a frame called.
Answer
A. Sling
21
A device which acts as stopping mechanism when the elevator runs beyond its rated speed.
Answer
B. Over speed governor
22
One Micrometer is equal to.
Answer
C. 0.001mm
23
If the belt of an electric motor is broken, it needs the following type of maintenance
Answer
A. Corrective
24
Type of maintenance is done before failure.
Answer
A. Preventive
25
The device which connects the elevator car and landing doors without backlash.
Answer
B. Door coupler
26
It is used to know the elevator car position.
Answer
B. Floor position indicator
27
Which of the following is not a safety device on an elevator?
Answer
C. Call button
28
Compensating ropes are generally required on elevators when the travel is.
Answer
D. 30 M or greater
29
A cylindrical rod with both ends threaded is known as.
Answer
C. Stud
30
Sliding part between elevator guide rail and car.
Answer
B. Guide shoe
31
The elevator which is used to transport goods.
Answer
C. Freight elevator
32
A standard metric thread having 3 mm pitch on 40 mm diameter designated as.
Answer
B. M40 x 3
33
Maximum travel height of a roped holeless hydraulic elevator is
Answer
D. 18 m
34
To unlock door interlock when the cabin comes at the floor level in a manually operated doors.
Answer
A. Returning cams
35
The portion of a building or structure used for discharge of passenger or goods into or from a lift car.
Answer
D. Lift landing
36
On a triple thread screw, lead equals.
Answer
D. 3 times of pitch
37
In a ball bearing balls are subjected to.
Answer
C. Fatigue
38
Bronze is welded by
Answer
C. Oxidizing flame
39
The included angle of V- Belt is usally
Answer
C. 30Β° - 40Β°
40
Scaffolding method is used for travel up to.
Answer
D. 40 m
41
A moving staircase which carries people between floors of building.
Answer
B. Escalator
42
Which of the following is a scalar quantity?
Answer
D. Speed
43
The side of an escalator extending above the step.
Answer
C. Balustrade
44
String cable is used to
Answer
B. Connect two door panels
45
Scribers are made of
Answer
C. High carbon steel
46
The part of the step where a passenger stands on escalator.
Answer
A. Step tread
47
The point angle of the drill depends on the.
Answer
D. Material of work
48
File card is used for
Answer
C. Cleaning the file teeth
49
Mechanical device attached to the car frame or counter weight to stop and hold in the event of free fall
Answer
B. Safety gear
50
Which device is used to mount the pulley on shaft?
Answer
A. Key
51
In terms of energy bands, semiconductors can be defined as those material which at room temperature have
Answer
D. All of the above
52
In an N type semiconductor there are
Answer
C. Immobile positive ions
53
A square wave oscillator is
Answer
B. An Astable multivibrator
54
In a transistor the reverse saturation current ICo
Answer
A. Doubles for every 10Β°C rise in temperature
55
An SCR can be turned OFF by
Answer
C. Reducing the Anode current below the holding current
56
DIAC is a
Answer
B. Two terminal device
57
Which one of the following is not a characteristics of the UJT
Answer
C. Gate current
58
A TRIAC can be triggered
Answer
C. By positive & negative cycle of the supply
59
The procedure used for controlling the speed of a 3 phase induction motor is
Answer
C. variable voltage -variable frequency method
60
The purpose of the synchronizing control in a CRO is to
Answer
D. Lock the display of the signal
61
Which is the necessary condition for generating sinusoidal voltage in a feedback type oscillator
Answer
D. Both A and B
62
The largest number that can be represented by 'n' bits is
Answer
A. 2^(n) - 1
63
The binary equivalent of the Hexadecimal number (18)ββ is
Answer
D. 00011000b
64
The output of a logic gate is "1" when all its inputs are at logic "0", the gate is
Answer
D. None of above
65
If a mod 9 counter is constructed using 4 flip flops the counter will skip
Answer
A. 7 Counts
66
The two input OR gate is
Answer
C. 7432
67
Which of the following statement about RAM is not correct
Answer
D. The data's are entered or stored in the chip during manufacturing
68
The PIV of diode in a half wave rectifier circuit with shunt capacitor filter is
Answer
A. 2Vm
69
The number of comparators required in a 3 bit comparator type ADC is
Answer
B. 7
70
The rotor of a stepper motor has no
Answer
D. All of these
71
Which method of speed control cannot be used in a permanent magnet dc motor
Answer
C. Varying the field current
72
Which test on a transformer provides information about regulation, efficiency and heading under load conditions.
Answer
D. back to back test
73
In a transformer the resistance between primary and secondary must be
Answer
D. infinite
74
V curves for a synchronous motor represent relation between
Answer
C. Armature current & field current
75
An induction motor is expected to take largest starting current under which method of starting
Answer
A. Direct online starting
76
The starting capacitor of a single phase motor is
Answer
A. Electrolytic capacitor
77
An elevator drive is required to operate in
Answer
D. Four quadrants only
78
An ideal insulating material should have low
Answer
C. dielectric loss angle
79
Two wire A and B of the same material and length l and 2l have radius r and 2r respectively, the ratio of their specific resistance will be
Answer
A. 1:1
80
Across the surface of a charged conductor, the electric
Answer
C. field is discontinuous
81
In magnetic circuits, an air gap is usually inserted so as to
Answer
B. prevent saturation
82
An Electromagnetic field is radiated from a
Answer
D. an oscillating dipole
83
In a series RLC circuit, the maximum voltage across the capacitor occurs at a frequency
Answer
B. below the resonant frequency
84
Wave winding is employed in a DC Machine of
Answer
B. low current and high voltage rating
85
The flux in transformer core
Answer
C. remains constant irrespective of Load
86
In cylindrical Rotor ............ portion of the rotor is wound
Answer
B. two third
87
Protection by fuses is generally not used beyond
Answer
A. 200 A
88
Aluminium conductor cables can be joined by
Answer
C. compression
89
Minimum distance of underground cable from the foundation of the building should be
Answer
C. 10 cm
90
Resolution of an instrument is
Answer
A. the minimum quantity it can measure
91
The response of a galvanometer is independent of its
Answer
C. circuit resistance
92
A dynamometer type wattmeter response to the
Answer
A. average value of active power
93
Permission for addition/alteration in the lift installation is granted in
Answer
B. Form B
94
The licence for existing lift/escalator is issued in?
Answer
A. Form F
95
Motor used for elevators is generally
Answer
B. induction motor
96
A synchronous motor is found to be more economical when the load is above
Answer
D. 100 kW
97
According to Indian Electricity rules, extra high voltage implies voltage exceeding.
Answer
C. 33 kV
98
The first type of variable speed drive ever used on lifts was the so-called
Answer
B. Ward-Leonard system
99
What type of elevator is used for low rise buildings where speed is not the main consideration?
Answer
C. Hydraulic
100
Which motors are invariably used in lift systems to achieve good starting torques and enable good speed control using variable voltage systems
Answer
B. Double cage rotor induction motors
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