Question19:-Among the following which is the book of Herman Gundert ?
A:-Puthan Pana
B:-Mishiha Charitham
C:-Sathyaveda Itihasam
D:-Janova Parvam
Correct Answer:- Option-C
Question20:-The Araya Samajam was founded by
A:-Sahodaran Ayyappan
B:-Pandit Karuppan
C:-Ayyankali
D:-Ayya Vaikunda Swamikal
Correct Answer:- Option-B
Question21:-Coating of fluorescent lamps
A:-Reduces glare
B:-Converts UV rays to visible light
C:-Converts visible light to UV rays
D:-Converts visible light to IR rays
Correct Answer:- Option-B

Question22:-If the supply frequency of a 4 pole induction motor is 50 Hz and that of rotor induced emf is 1.5 Hz, at what
speed the motor is running ?

A:-1500 rpm

B:-1490 rpm

C:-1455 rpm

D:-1425 rpm

Correct Answer:- Option-C

Question23:-Calculate the average value of a sinusoidal voltage with a maximum value of 100 V.

A:-63.66 V

B:-70.71 V

C:-31.84 V

0-۷

Correct Answer:- Option-A

Question24:-A coil consists of 700 turns and a current of 10 A on the coil gives rise to a flux of 1.2 mWb. Find the voltage
induced in the coil if the current is reversed in 0.02 second.
A:-0.9 mV

C:-1.96 mV
D:-1.68 mV
Correct Answer:- Option-D
Question25:-The open circuit test on transformer will provide the value of
A:-Core loss
B:-Full load Cu loss
C:-Cu loss at half load
D:-Total full load loss
Correct Answer:- Option-A
Question26:-As per IS classification, the minimum compressive strength of a first class brick should be
A:-75 Kg/*cm*(2)*
B:-100 Kg/*cm*(2)*
C:-125 Kg/*cm*(2)°
D:-150 Kg/*cm*(2)°
Correct Answer:- Option-B
Question27:-The workability of concrete is assessed through
1. Slump test
2. Compaction factor test
3. Setting time of cement
4. Le-Chatelier's apparatus
A:-Land 2
B:-2 and 3
C:-3 and 4
D:-4 and 1
Correct Answer:- Option-A